Security Policy Using Policy Groups

Security Policy Using Policy Groups

Table 1. Feature History

Feature Name

Release Information

Description

Security Policy Using Policy Groups

Cisco IOS XE Catalyst SD-WAN Release 17.12.1a

Cisco Catalyst SD-WAN Manager Release 20.12.1

This feature provides a simple, reusable, and structured approach for configuring security policies in Cisco Catalyst SD-WAN. You can create a security policy, that is, a logical grouping of policies that is applied to one or more sites or a single device at a site in the network. To deploy the policy group to devices, the devices must be managed by a configuration group in Cisco Catalyst SD-WAN.

The Deploy Policy Group workflow provides a guided method to choose previously created policy groups and deploy them to sites or a single device at a site that is managed by configuration groups.

Configure Secure Service Edge

Cisco IOS XE Catalyst SD-WAN Release 17.13.1a

Cisco Catalyst SD-WAN Manager Release 20.13.1

With this feature you can configure a Secure Service Edge (SSE) profile using Cisco Secure Access as the provider. You can associate the SSE profile to a policy group to deploy to a device.

Information About Security Policy

Configuring security policies using policy groups simplifies the experience of configuring and deploying policies on Cisco IOS XE Catalyst SD-WAN devices. Use a workflow to configure policies and associate them with devices in the network.

The Policy Groups page includes the following:

  • Policy Group (see Policy Group chapter)

  • Application Priority & SLA (see Policy Group chapter)

  • Embedded Security

  • Secure Internet Gateway (SIG)

  • DNS Security

Enable RBAC for Security Policy

To create a policy group and security feature profiles using configuration groups, role-based access control (RBAC) must provide read and write permissions on the following profiles to access each feature. Set the permissions of the user group to enable access to policy groups from Configuration > Policy Groups.

  1. From the Cisco SD-WAN Manager menu, choose Administration > Manage Users > User Groups.

  2. Click Add User Group.

  3. Enter User Group Name.

  4. Check a Read or Write check box for the Policy Group, Device and Deploy feature that you want to assign to a user group.

  5. Check a Read or Write check box for the following features that you want to assign to a user group:

    • Feature Profile > DNS Security > DNS Policy

    • Feature Profile > Sig Security > Sig Policy

    • Feature Profile > Embedded Security > Legacy Policy

    • Feature Profile > Embedded Security > NGFirewall

    • Feature Profile > Embedded Security > Policy

    • Feature Profile > Policy Object > Advanced Inspection Profile

      The Advanced Inspection Profile has the following subfeature profiles:

      • Advanced Malware Protection

      • Intrusion Prevention

      • SSL Decryption

      • SSL Decryption Profile

      • URL Filtering

  6. Click Add.

Restrictions for Security Policy

From Cisco IOS XE Catalyst SD-WAN Release 17.14.1a and Cisco Catalyst SD-WAN Manager Release 20.14.1, security policy supports matching traffic using a custom application in a custom-defined application list. In earlier releases, this is not supported.

Configure a Security Policy Using a Policy Group

Using the Create Security Policy workflow, you can create a security policy, add sub-policy, add rules to existing sub-policies, and so on.

  1. From the Cisco SD-WAN Manager menu, choose Workflows > Workflow Library > Create Security Policy. Alternatively, choose Configuration > Policy Groups.

  2. Click Embedded Security.

  3. On the Embedded Security page, click Add Security Policy. This launches the Security Policy workflow.

  4. Enter Policy Name and Description and click Next.

  5. On the Select the optional Configuration Group to associate with the security policy page, choose the configuration groups and click Next.

  6. Click Add Sub-Policy. Refer to the steps used in the procedure, Configure an Embedded Security Sub-Policy.

  7. Click Submit.You can view the new security policy in the Embedded Security tab.

Configure a Group of Interest for a Security Policy

  1. From the Cisco SD-WAN Manager menu, choose Configuration > Policy Groups > Group of Interest.

  2. Click the Security tab. The list of security objects and profiles appears.

Use the following tables to configure a different group of lists for security policy:

Application

Field

Description

Application List Name

Name of the application list.

Note

 

See the information about custom applications in Restrictions for Security Policy.

Applications

Choose one or more application types from the drop-down list. For example, Third Party Control, ABC News, Microsoft Teams, and so on.

Choose one or more application family types from the drop-down list. For example, application-service, audio_video, authentication, behavioral, compression, database, encrypted, and so on.

Data Prefix

Field

Description

Data Prefix List Name

Name of the prefix list.

Data Prefix

The data prefix value.

Local Domain

Field

Description

Local Domain List Name

Name of the local domain list.

Local Domain

The local domain values separated by comma. For example, cisco.com.

FQDN (Fully Qualified Domain Name)

The FQDN is intended to be used for matching standalone servers in data centers or a private cloud. When matching public URLs, the recommended match action is drop. If you use inspect for public URLs, you must define all related sub URLs and redirect URLs.

Field

Description

FQDN List Name

Name of the FQDN list.

FQDN

The URL names separated by comma. For example, cisco.com.

Signature

The signature set blocks vulnerability with a Common Vulnerability Scoring System (CVSS) score that is greater than or equal to 9. It also blocks Common Vulnerabilities and Exposures (CVEs) published in the last two years and that have the rule categories: Malware CNC, Exploit Kits, SQL Injection or blocked list.

Field

Description

IPS Signature List Name

Name of the IPS signature list.

IPS Signature

The signatures in the format Generator ID:Signature ID, separated with commas. For example, 1234:5678.

Range is 0 to 4294967295

URL Allow

List-based filtering allows the user to control access by permitting or denying access based on allowed or blocked lists. Here are some important points to note about these lists:

  • URLs that are allowed are not subjected to any category-based filtering.

  • If the same item is configured under both the allowed and blocked list, the traffic is allowed.

  • If the traffic does not match either the allowed or blocked lists, then it is subjected to category-based and reputation-based filtering.

Field

Description

Allow URL List Name

Name of the Allow URL list.

Allow URL

The URLs to allow.

URL Block

List-based filtering allows the user to control access by permitting or denying access based on allowed or blocked lists.

Field

Description

Block URL List Name

Name of the Block URL list.

Block URL

The URLs to block.

Zone

Field

Description

Zone List Name

Name of the zone list.

VPN

Choose to configure zones with zone type as VPN. Add the VPNs to the zones from the drop-down list. The options are:

  • Payment Processing Network

  • Corporate Users

  • Local Internet for Guests

  • Physical Security Devices

Interface

Choose to configure zones with zone type as Interface. Add the interfaces to the zones from the Add Interface drop-down list. The options are:

  • Ethernet

  • FastEthernet

  • FiveGigabitEthernet

  • FortyGigabitEthernet

  • GigabitEthernet

  • HundredGigE

Port

Field

Description

Port List Name

Name of the port list.

Port

The port values separated by comma.

The range is 0 to 65530.

Protocol

Field

Description

Protocol List Name

Name of the protocol list.

Protocols

Select one or more protocol names from the drop-down list. For example, snmp, tcp, udp, icmp, echo, telnet, and so on.

Geo Location

Field

Description

Geo Location List Name

Name of the geolocation list.

Geo Location

Select one or more geo locations from the drop-down list. For example, Africa, Antartic, Asia, Europe, and so on.

The security group of interest has the following profiles:

  • Advanced Inspection Profile

  • Intrusion Prevention Policy

  • URL Filtering

  • Advanced Malware Protection

  • TLS/SSL Profile

  • TLS/SSL Decryption

Advanced Inspection Profile

Field

Description

Profile Name

Name of the advanced inspection profile.

Description

The description of the profile.

Select an Intrusion Prevention

Choose an intrusion prevention option from the drop-down list.

Select an URL Filter

Choose a URL filter from the drop-down list.

Select an Advanced Malware Protection

Choose an advanced malware protection.

TLS Action

Choose the TLS action. The options are:

  • Decrypt

  • Pass Through

  • Do not Decrypt

Intrusion Prevention Policy

Field

Description

Profile Name

Name of the intrusion prevention policy.

Signature Set

Choose a signature set that defines the rules for an evaluating traffic from the Signature Set drop-down list. The following options are available.

  • Balanced: Provides protection without significant effect on system performance.

  • Connectivity: Less restrictive and provide better performance by imposing fewer rules.

  • Security: Provides more protection than Balanced but with an impact on performance.

Inspection Mode

Choose the inspection mode. The following options are available:

  • Detection: Choose this option for intrusion detection mode.

  • Protection: Choose this option for intrusion protection mode.

Custom Signature Set

Select one or more web categories from the drop-down list. The categories are: abortion, abused-drugs, auctions, and so on.

Select an Signature Allow List

Select a signature allow list.

Alerts Log Level

Choose the alert log level:

  • Error

  • Emergency

  • Alert

  • Critical

  • Warning

  • Notice

  • Info

  • Debug

URL Filtering Policy

Field

Description

Profile Name

Name of the URL filtering policy.

Web Category

Choose the web category. The options are Block and Allow.

Web Reputation

Choose the web reputation from the drop-down list. The reputation options are:

  • High Risk

  • Suspicious

  • Moderate Risk

  • Low Risk

  • Trustworthy

Select one or more web categories

Select one or more web categories from the drop-down list. The categories are: abortion, abused-drugs, auctions, and so on.

Select allow URL list

Select an allow URL list.

Select block URL list

Select a block URL list.

Block Page Server

Choose one of the options:

  • Block Page Content: Enter the default content header and content body.

  • Redirect URL: Enter the redirect URL.

Alerts and Logs

Choose the alert and log type:

  • Blocklist

  • Allowlist

  • Reputation/Category

Advanced Malware Protection Policy

Field

Description

Profile Name

Name of the advanced malware protection policy name.

Select AMP Cloud Region

Select AMT Cloud region. The options are:

  • NAM

  • EU

  • APJC

Alert Log Level

Choose the alert log level. The options are:

  • Critical

  • Warning

  • Info

File Analysis

Enable file analysis.

Select TG Cloud Region

Select TG Cloud region. The options are NAM and EU.

Select one or more file types

Select one or more file types. The options are, pdf, ms-exe, new-office, rtf, mdb, mscab, msole2, wri, xlw, flv, and swf.

TLS/SSL Profile

Field

Description

Profile Name

Name of the TLS/SSL profile.

Select Categories to assign action

Set the categories between the actions—Decrypt, No Decrypt, and Pass Through URL Categories.

Alternatively, choose multiple categories and set the action.

Reputation

Enable reputation to choose the Decrypt Threshold. The decrypt threshold options are:

  • High Risk

  • Suspicious

  • Moderate Risk

  • Low Risk

  • Trustworthy

Advanced Options

Select a Decrypt Domain list

Choose the decrypt domain list or click Create New to create a new decrypt domain list.

  1. Enter Decrypt Domain List Name.

  2. Enter Decrypt Domain

  3. Click Add.

Select a No Decrypt Domain list

Choose the no decrypt domain list or click Create New to create a new no decrypt domain list.

  1. Enter No Decrypt Domain List Name.

  2. Enter No Decrypt Domain

  3. Click Add.

Fail Decrypt

Enable the fail decrypt option, if decryption fails.

TLS/SSL Decryption

Field Name

Description

Policy Name

Name of the policy. The name can contain a maximum of 32 characters.

Server Certificate Checks

Expired Certificate

Defines what the policy should do if the server certificate has expired. The options are:

  • Drop: Drop traffic

  • Decrypt: Decrypt traffic

Untrusted Certificate

Defines what the policy should do if the server certificate is not trusted. The options are:

  • Drop: Drop traffic

  • Decrypt: Decrypt traffic

Certificate Revocation Status

Defines whether the Online Certificate Status Protocol (OCSP) should be used to check the revocation status of the server certificate. The options are Enabled or Disabled.

Unknown Revocation Status

Defines what the policy does, if the OCSP revocation status is unknown.

  • Drop: Drop traffic

  • Decrypt: Decrypt traffic

Unsupported Mode Checks

Unsupported Protocol Versions

Defines the unsupported protocol versions.

  • Drop: Drop the unsupported protocol versions.

  • Decrypt: Decrypt the unsupported protocol versions.

Unsupported Cipher Suites

Defines the unsupported cipher suites.

  • Drop: Drop the unsupported cipher suites.

  • Decrypt: Decrypt the unsupported cipher suites.

Failure Mode

Defines the failure mode. The options are close and open.

Certificate Bundle

Check the Use default CA certificate bundle checkbox to use the default CA.

Minimum TLS Version

Sets the minimum version of TLS that the proxy should support. The options are:

  • TLS 1.0

  • TLS 1.1

  • TLS 1.2

Proxy Certificate Attributes

RSA Keypair Modules

Defines the Proxy Certificate RSA Key modules. The options are:

  • 1024 bit RSA

  • 2048 bit RSA

  • 4096 bit RSA

Ec Key Type

Defines the key type. The options are:

  • P256

  • P384

  • P521

Certificate Lifetime (in Days)

Sets the lifetime of the proxy certificate, in days.

Configure Embedded Security

Security is a critical element of today's networking infrastructure. Network administrators and security officers are hard pressed to defend their networks against attacks and breaches. Due to hybrid clouds and remote employee connectivity, the security perimeter around networks is disappearing.

The Enterprise Firewall with Application Awareness uses a flexible and easily understood zone-based model for traffic inspection, compared to the older interface-based model.

A firewall policy is a type of localized security policy that allows stateful inspection of TCP, UDP, and ICMP data traffic flows. Traffic flows that originate in a given zone are allowed to proceed to another zone based on the policy between the two zones. A zone is a grouping of one or more VPNs. Grouping VPNs into zones allows you to establish security boundaries in your overlay network so that you can control all data traffic that passes between zones. For more information on Embedded Security, see Enterprise Firewall with Application Awareness.

  1. From the Cisco SD-WAN Manager menu, choose Configuration > Policy Groups > Embedded Security.

  2. Choose a security policy and click Edit.

  3. Click Add Rule.

Field

Description

Rule Name

The name of the rule.

Sequence

Specify the sequence.

Destination Zone

In the Destination Zone drop-down list, choose the zone to which data traffic is sent. The options are:

  • No-Zone

  • Corporate_Users

  • Local_Internet_for_Guests

  • Payment_Processing_Network

  • Physical_Security_Devices

  • Self

  • Untrusted

Zones are created based on the VPNs in the configuration group selected in the create security policy workflow.

Match

Choose the desired match conditions from the Add Conditions drop-down list. The options are:

  • Applications

  • Protocol

  • Source

    • Geo Location

    • IPv4 Prefix

    • Port

  • Destination

    • FQDN

    • Geo Location

    • IPv4 Prefix

    • Port

When ISE is enabled, then SGT option is available in the Source and Destination. Identity User or User group is only supported for Source.

Action

Choose the desired action conditions. The options are:

  • Pass

  • Drop

  • Inspect

  • Log Events: Unified Logging for Inspect Action. Select Advanced Inspection Profile from the drop-down list.

Configure an Embedded Security Sub-Policy

  1. From the Configuration > Policy Groups, choose Embedded Security.

  2. Choose a security policy from the list and click Edit. and enter the following details.

  3. Click Add Sub-Policy to add sub-policies for a security policy.

Field

Description

VPN / Interface

Specify the VPN or the interface.

Source Zone

Choose the zone that is the source of the data packets.

Zone List Name

The name of a zone list.

VPN

Choose to configure zones with zone type as VPN. Add the VPNs to the zones from the drop-down list. The options are:

  • Payment Processing Network

  • Corporate Users

  • Local Internet for Guests

  • Physical Security Devices

Interface

Choose to configure zones with zone type as Interface. Add the interfaces to the zones from the Add Interface drop-down list.

Rule Name

The name of the rule.

Sequence

Specify the sequence.

Destination Zone

Choose the zone to which data traffic is sent. The options are:

  • Any

  • Corporate_Users

  • Local_Internet_for_Guests

  • Payment_Processing_Network

  • Physical_Security_Devices

  • Self

  • Untrusted (VPN 0)

Match

Choose the desired match conditions from the Add Conditions drop-down list. The options are:

  • Applications

  • Protocol

  • Source

    • Geo Location

    • IPv4 Prefix

    • Port

  • Destination

    • FQDN

    • Geo Location

    • IPv4 Prefix

    • Port

Action

Choose the desired action conditions. The options are:

  • Pass

  • Drop

  • Inspect

  • Log Events - Unified Logging for Inspect Action. Select Advanced Inspection Profile from the drop-down list.

User / User Group

An identity service engine has to be enabled to configure User / User Group sub policies. You can configure using Administration > Integration Management > Identity Service Engine.

Configure Embedded Security Additional Settings

  1. From the Cisco SD-WAN Manager menu, choose Configuration > Policy Groups, choose Embedded Security.

  2. Choose a security policy from the list and click Edit and enter the following details.

  3. Click Additional Settings to configure additional settings for a security policy.

    Field

    Description

    TCP SYN Flood Limit

    Specify the threshold of SYN flood packets per second for each destination address.

    Max Incomplete

    Specify the timeout limits for the firewall policy. A Max Incomplete timeout limit protects firewall resources and keeps these resources from being used up.

    TCP Limit

    Specify the maximum TCP half-open sessions allowed on a device.

    UDP Limit

    Specify the maximum UDP half-open sessions allowed on a device.

    ICMP Limit

    Specify the maximum ICMP half-open sessions allowed on a device.

    Audit Trail

    Enable the Audit Trail option. This option is only applicable for rules with an inspect action.

    Unified Logging

    Enable the unified logging feature.

    Optimized Policy

    Enable the optimized policy option.

    Session Reclassify Allow

    Allow re-classification of traffic on policy change.

    ICMP Unreachable Allow

    Allow ICMP unreachable packets to pass through.

    Advanced Inspection Profile

    Attach a global advanced inspection profile (AIP) at a device level. All the rules in the device that match the traffic to be inspected are inspected using the advance inspection profile.

  4. Choose the profile from the Advanced Inspection Profile drop-down list or click Create New.

    Field

    Description

    Profile Name

    The name of the profile.

    Description

    The description of the profile.

    Select an Intrusion Prevention

    Specify the maximum TCP half-open sessions allowed on a device.

    UDP Limit

    Specify the maximum UDP half-open sessions allowed on a device.

    ICMP Limit

    Specify the maximum ICMP half-open sessions allowed on a device.

    Audit Trail

    Enable the Audit Trail option. This option is only applicable for rules with an inspect action.

    Unified Logging

    Enable the unified logging feature.

    Optimized Policy

    Enable the optimized policy option.

    Session Reclassify Allow

    Allow re-classification of traffic on policy change.

    ICMP Unreachable Allow

    Allow ICMP unreachable packets to pass through.

  5. Choose the intrusion prevention from the Select an Intrusion Prevention drop-down list or click Create New.

    Field

    Description

    Profile Name

    The name of the profile. The name can have a maximum of 32 characters.

    Signature Set

    Specify the signature set. The options are:

    • Balanced

    • Connectivity

    • Security

    Inspection Mode

    Specify the inspection mode. The options are:

    • Detection

    • Protection

    Advanced

    Customer Signature Set

    Enable customer signature set to add a new global custom signature. In the Add New Global Custom Signature window, choose Download From the following options:

    • Remote Server

    • Local Server (Not Recommended)

    Select an Signature Allow List

    Select an allowed signature list or Create New to create a new IPS signature list.

    Alert Log Level

    Choose the alert log level:

    • Error

    • Emergency

    • Alert

    • Critical

    • Warning

    • Notice

    • Info

    • Debug

  6. Click Add.

  7. Choose the advanced malware protection profile from the Select an Advanced Malware Protection drop-down list or click Create New.

    Field

    Description

    Profile Name

    The name of the profile. The name can have a maximum of 32 characters.

    Select AMP Cloud Region

    Choose the AMP cloud region. The options are:

    • NAM

    • EU

    • APJC

    Inspection Mode

    Specify the inspection mode. The options are:

    • Detection

    • Protection

    Alert Log Level

    Choose the alert log level:

    • Critical

    • Warning

    • Info

    File Analaysis

    Enable file analysis.

    Select TG Cloud Region

    Choose the cloud region from the drop-down list. The options are:

    • NAM

    • EU

    Alert Log Level

    Choose the alert log level:

    • Critical

    • Warning

    • Info

    Select one or more file types

    Choose one or more file type from the drop-down list:

    • All

    • pdf

    • ms-exe

    • new-office

    • rtf

    • mdb

    • mscab

    • msole2

    • wri

    • xlw

    • flv

    • swf

  8. Click Add.

  9. Choose a URL filter from the URL Filter drop-down list or Create New.

    Field

    Description

    Profile Name

    The name of the profile. The name can have a maximum of 32 characters.

    Web Category

    Choose the web category from the drop-down list. The options are:

    • Block

    • Allow

    Select one or more web categories

    Choose one or more web categories from the drop-down list. The options are: abortion, abused-drugs and so on.

    Web Reputation

    Choose the web reputation from the drop-down list. The reputation options are:

    • High Risk

    • Suspicious

    • Moderate Risk

    • Low Risk

    • Trustworthy

    Advanced

    Select allow url list

    Select an allowed URL list or Create New to create a new allow URL list.

    Select block url list

    Select a blocked URL list or Create New to create a new block URL list.

    Block Page Server

    Choose the block page server from the drop-down list. The options are:

    • Block Page Content

    • Redirect URL: Specify the redirect URL

    Alerts And Logs

    Choose one or more file type from the drop-down list:

    • Blocklist

    • Allowlist

    • Reputation/Category

  10. Click Add.

  11. Choose TLS Action.

    Field

    Description

    TLS Action

    Choose the web category from the drop-down list. The options are:

    • Decrypt

    • Pass Through

    • Do not Decrypt

    Select an TLS/SSL Decryption

    Choose the TLS/SSL decryption profile from the drop-down list or Create New profile.

Configure a Secure Internet Gateway

Cisco Catalyst SD-WAN edge devices support routing, security, and other LAN access features that can be managed centrally. On high-end devices, you can enable all these features while providing the scale and performance required by large enterprises. However, on lower-end devices, enabling all the security features simultaneously can degrade performance. To avoid the performance degradation, integrate lower-end devices with Secure Internet Gateways (SIG) that do most of the processing to secure enterprise traffic. When you integrate a Cisco Catalyst SD-WAN edge device with a SIG, all client internet traffic, based on routing or policy, is forwarded to the SIG.

Access Umbrella credentials from Administration > Settings > Cloud Provider Credentials.

To configure a secure internet gateway:

  1. From the Cisco SD-WAN Manager menu, choose Configuration > Policy Groups > Secure Internet Gateway.

  2. Click Add Secure Internet Gateway.

  3. Choose SIG Provider. The options are:

    • Umbrella

    • Zscaler

    • Generic

Umbrella Configuration

Table 2. Cisco Umbrella Credentials

Field

Description

Organization ID

Enter the Cisco Umbrella organization ID (Org ID) for your organization.

For more information, see the Cisco Umbrella SIG User Guide.

SIG Umbrella API Key

Enter the Umbrella Management API Key.

Management API keys are used in SIG is Secure Internet Gateway (SIG) - (Management).

For more information, see the Cloud Security API documentation on the Cisco DevNet portal.

SIG Umbrella API Secret

Enter the Umbrella Management API Secret.

For more information, see the Cloud Security API documentation on the Cisco DevNet portal.

Zscaler Configuration

You can access Zscaler credentials from Administration > Settings > Cloud Provider Credentials.

Table 3. Zscaler Credentials

Field

Description

Organization

Name of the organization in Zscaler cloud.

Partner base URI

This is the base URI that Cisco SD-WAN Manager uses in REST API calls.

To find this information on the Zscaler portal, see the ZIA Help > ZIA API > API Developer & Reference Guide > Getting Started.

Username

Username of the Cisco Catalyst SD-WAN partner account.

Password

Password of the Cisco Catalyst SD-WAN partner account.

Partner API key

Partner API key.

To find the key in Zscaler, see Managing SD-WAN Partner Keys.

Generic Configuration

To create tunnels, click Configuration and do the following:

Parameter Scope

Scope Description

Device Specific (indicated by a host icon)

Use device-specific value for the parameter. For device-specific parameters, you cannot enter value in the feature template. Enter the value when you add a device to the configuration group.

To change the default key, type a new string and move the cursor out of the Enter Key box.

Global (indicated by a globe icon)

Enter value for the parameter, and apply that value to all devices.

  1. Click Add Tunnel.

  2. In the Add Tunnel dialog box, under Basic Settings configure the following:

    Table 4. Basic Settings
    Field Description
    Tunnel Type

    Umbrella: (Read only) ipsec

    Zscaler: Click ipsec or gre.

    Generic: Click ipsec or gre.

    Interface Name (1..255)

    Name of the interface.
    Description

    Description for the interface.
    Tracker

    By default, a tracker is attached to monitor the health of tunnels.
    Tunnel Source Interface Name of the source interface of the tunnel. This interface should be an egress interface and is typically the internet-facing interface.
    Source Public IP

    (Automatic GRE tunnels to Zscaler only)

    Public IP address of the tunnel source interface that is required to create the GRE tunnel to Zscaler.

    Default: Auto

    We recommend that you use the default configuration. With the default configuration, the Cisco IOS XE SD-WAN device finds the public IP address assigned to the tunnel source interface using a DNS query. If the DNS query fails, the device notifies Cisco SD-WAN Manager of the failure. Enter the public IP address only if the DNS query fails.

    Data-Center For a primary data center, click Primary, or for a secondary data center, click Secondary. Tunnels to the primary data center serve as active tunnels, and tunnels to the secondary data center serve as back-up tunnels.
    Tunnel Destination IP Address/FQDN

    (Manual tunnels only)

    The IP address of the SIG provider endpoint. The configuration of FQDN for Tunnel Destination IP address is not supported.

    Preshared Key

    (Manual tunnels only)

    This field is displayed only if you choose ipsec as the Tunnel Type.

    Enter the password to use with the preshared key.

    Advanced Options
    Shutdown

    Click No to enable the interface; click Yes to disable.

    Default: No
    IP MTU

    Specify the maximum MTU size of packets on the interface.

    Range: 576 to 2000 bytes

    Default: 1400 bytes
    TCP MSS

    Specify the maximum segment size (MSS) of TPC SYN packets. By default, the MSS is dynamically adjusted based on the interface or tunnel MTU such that TCP SYN packets are never fragmented.

    Range: 500 to 1460 bytes

    Default: None
    DPD Interval

    Specify the interval for IKE to send Hello packets on the connection.

    Range: 10 to 3600 seconds

    Default: 10
    DPD Retries

    Specify the number of seconds between DPD retry messages if the DPD retry message is missed by the peer.

    After one DPD message is missed by the peer, the router changes the state and sends a DPD retry message at a faster retry interval, which is the number of seconds between DPD retries if the DPD message is missed by the peer. The default DPD retry message is sent every 2 seconds. Five DPD retry messages can be missed before the tunnel is marked as down.

    Range: 2 to 60 seconds

    Default: 3

    IKE
    IKE Rekey Interval

    Specify the interval for refreshing IKE keys.

    Range: 3600 to 1209600 seconds (1 hour to 14 days)

    Default: 14400 seconds
    IKE Cipher Suite

    Specify the type of authentication and encryption to use during IKE key exchange.

    Choose one of the following:

    • AES 256 CBC SHA1

    • AES 256 CBC SHA2

    • AES 128 CBC SHA1

    • AES 128 CBC SHA2

    The IPsec Cipher Suite defaults vary by the type of the SIG:

    • Umbrella: AES 256 GCM

    • Zscaler: None

    • Generic: NULL SHA 512
    IKE Diffie-Hellman Group

    Specify the Diffie-Hellman group to use in IKE key exchange, whether IKEv1 or IKEv2.

    • 2 1024-bit modulus

    • 14 2048-bit modulus

    • 15 3072-bit modulus

    • 16 4096-bit modulus

    The IKE group defaults vary by the type of the SIG:

    • Umbrella: 14 2048-bit modulus

    • Zscaler: 2 1024-bit modulus

    • Generic: 16 4096-bit modulus

    IPSec
    IPsec Rekey Interval

    Specify the interval for refreshing IPsec keys.

    Range: 3600 to 1209600 seconds (1 hour to 14 days)

    Default: 3600 seconds
    IPsec Replay Window

    Specify the replay window size for the IPsec tunnel.

    Options: 64, 128, 256, 512, 1024, 2048, 4096.

    Default: 512
    IPsec Cipher Suite

    Specify the authentication and encryption to use on the IPsec tunnel.

    Options:

    • AES 256 CBC SHA1

    • AES 256 CBC SHA 384

    • AES 256 CBC SHA 256

    • AES 256 CBC SHA 512

    • AES 256 GCM

    • NULL SHA1

    • NULL SHA 384

    • NULL SHA 256

    • NULL SHA 512

    Default: AES 256 GCM
    Perfect Forward Secrecy

    Specify the PFS settings to use on the IPsec tunnel. Choose one of the following Diffie-Hellman prime modulus groups:

    • Group-2 1024-bit modulus

    • Group-14 2048-bit modulus

    • Group-15 3072-bit modulus

    • Group-16 4096-bit modulus

    • None: disable PFS

    The Perfect Forward Secrecy defaults vary by the type of the SIG:

    • Umbrella: None

    • Zscaler: None

    • Generic: Group 16

  3. Click Add.


Note

When a security policy associated with Zscaler is removed from a device and a new configuration group is deployed, the corresponding tunnel entry sometimes fails to be deleted from Zscaler's cloud services. As a result, attempting to establish a new tunnel may result in a DUPLICATE_ITEM error due to the presence of the existing entry. To resolve this issue, manually delete the stale tunnel entry from the Zscaler cloud whenever a security policy is removed from a device.

Tracker Configuration

To create one or more trackers to monitor tunnel health, click Tracker and do the following:

  1. Source IP Address: Enter a source IP address for the probe packets.

  2. Click Add Tracker.

  3. In the Add Tracker dialog box, configure the following:

    Table 5. Tracker Parameters
    Field Description
    Name Name of the tracker. The name can be up to 128 alphanumeric characters.
    API url of endpoint Specify the API URL for the SIG endpoint of the tunnel.
    Threshold

    Enter the wait time for the probe to return a response before declaring that the configured endpoint is down.

    Range: 100 to 1000 milliseconds

    Default: 300 milliseconds
    Probe Interval

    Enter the time interval between probes to determine the status of the configured endpoint.

    Range: 20 to 600 seconds

    Default: 60 seconds
    Multiplier

    Enter the number of times to resend probes before determining that a tunnel is down.

    Range: 1 to 10

    Default: 3

  4. Click Add.

High Availability Configuration

To designate active and back-up tunnels and distribute traffic among tunnels, click High Availability and do the following:

  1. Click Add Interface Pair.

  2. In the Add Interface Pair dialog box, configure the following:

    Field Description
    Active Interface

    Choose a tunnel that connects to the primary data center.
    Active Interface Weight

    Enter weight (weight range 1 to 255) for load balancing.

    Load balancing helps in distributing traffic over multiple tunnels and this helps increase the network bandwidth. If you enter the same weights, you can achieve ECMP load balancing across the tunnels. However, if you enter a higher weight for a tunnel, that tunnel has higher priority for traffic flow.

    For example, if you set up two active tunnels, where the first tunnel is configured with weight of 10, and the second tunnel with weight configured as 20, then the traffic is load-balanced between the tunnels in a 10:20 ratio.

    Backup Interface

    To designate a back-up tunnel, choose a tunnel that connects to the secondary data center.

    To omit designating a back-up tunnel, choose None.

    Backup Interface Weight

    Enter weight (weight range 1 to 255) for load balancing.

    Load balancing helps in distributing traffic over multiple tunnels and this helps increase the network bandwidth. If you enter the same weights, you can achieve ECMP load balancing across the tunnels. However, if you enter a higher weight for a tunnel, that tunnel has higher priority for traffic flow.

    For example, if you set up two back-up tunnels, where the first tunnel is configured with weight of 10, and the second tunnel with weight configured as 20, then the traffic is load-balanced between the tunnels in a 10:20 ratio.

  3. Click Add.

Configure a Secure Service Edge

Before You Begin

Create the Cisco SSE credentials from Administration > Settings > Cloud Credentials.

Configure a Secure Service Edge

Choose the SSE Provider. The options are:

  • Cisco Secure Access

  • (Minimum supported release: Cisco Catalyst SD-WAN Manager Release 20.14.1) Zscaler

Configure a Tracker

While creating automatic tunnels, Cisco SD-WAN Manager creates and attaches a default tracker endpoint with default values for failover parameters. However, you can also create customized trackers with failover parameters that suit your requirements.

  1. In the Source IP Address field, enter a source IP address without a subnet mask.

  2. Click Add Tracker.

  3. In the Add Tracker pop-up window, configure the following:

    Table 6. Tracker Parameters
    Field Description
    Name Name of the tracker. The name can be up to 128 alphanumeric characters.
    API url of endpoint

    Specify the API URL for the Secure Service Edge endpoint of the tunnel.

    Default: service.sig.umbrella.com
    Threshold

    Enter the wait time for the probe to return a response before declaring that the configured endpoint is down.

    Range: 100 to 1000 milliseconds

    Default: 300 milliseconds
    Probe Interval

    Enter the time interval between probes to determine the status of the configured endpoint.

    Range: 20 to 600 seconds

    Default: 60 seconds
    Multiplier

    Enter the number of times to resend probes before determining that a tunnel is up or down.

    Range: 1 to 10

    Default: 3

  4. Click Add.

Configure Tunnels

To create tunnels, click Configuration and do the following:

  1. Click Add Tunnel.

  2. In the Add Tunnel pop-up window, under Basic Settings, configure the following:

    Table 7. Basic Settings
    Field Description
    Tunnel Type

    • Cisco Secure Access: (Read only) ipsec

    • (Minimum supported release: Cisco Catalyst SD-WAN Manager Release 20.14.1) Zscaler: ipsec or gre
    Interface Name (1..255)

    Name of the interface.

    Description

    Enter a description for the interface.
    Tracker

    By default, a tracker is attached to monitor the health of tunnels.
    Tunnel Source Interface Name of the source interface of the tunnel. This interface should be an egress interface and is typically the internet-facing interface. The tunnel source interface supports loopback.

    Source Public IP

    (Minimum supported release: Cisco Catalyst SD-WAN Manager Release 20.14.1)

    Public IP address of the tunnel source interface that is required to create the GRE tunnel to Zscaler.

    Default: Auto.

    We recommend that you use the default configuration. With the default configuration, the Cisco IOS XE Catalyst SD-WAN device finds the public IP address assigned to the tunnel source interface using a DNS query. If the DNS query fails, the device notifies Cisco SD-WAN Manager of the failure. Enter the public IP address only if the DNS query fails.

    Data-Center For a primary data center, click Primary, or for a secondary data center, click Secondary. Tunnels to the primary data center serve as active tunnels, and tunnels to the secondary data center serve as back-up tunnels.

    Advanced Options (Optional)

    Shutdown

    Click the radio button to enable this option.

    Default: Disabled

    Enable Tracker

    Click the radio button to enable this option.
    IP MTU

    Specify the maximum MTU size of packets on the interface.

    Range: 576 to 2000 bytes

    Default: 1400 bytes
    TCP MSS

    Specify the maximum segment size (MSS) of TPC SYN packets. By default, the MSS is dynamically adjusted based on the interface or tunnel MTU such that TCP SYN packets are never fragmented.

    Range: 500 to 1460 bytes

    Default: None
    DPD Interval

    Specify the interval for Internet Key Exchange (IKE) to send Hello packets on the connection.

    Range: 10 to 3600 seconds

    Default: 10
    DPD Retries

    Specify the number of seconds between Dead Peer Detection (DPD) retry messages if the DPD retry message is missed by the peer.

    If a peer misses a DPD message, the router changes the state and sends a DPD retry message. The message is sent at a faster retry interval, which is the number of seconds between DPD retries. The default DPD retry message is sent every 2 seconds. The tunnel is marked as down after five DPD retry messages are missed.

    Range: 2 to 60 seconds

    Default: 3

    IKE
    IKE Rekey Interval

    Specify the interval for refreshing IKE keys.

    Range: 3600 to 1209600 seconds (1 hour to 14 days)

    Default: 14400 seconds
    IKE Cipher Suite

    Specify the type of authentication and encryption to use during IKE key exchange.

    Choose one of the following:

    • AES 256 CBC SHA1

    • AES 256 CBC SHA2

    • AES 128 CBC SHA1

    • AES 128 CBC SHA2

    Default: AES 256 CBC SHA1
    IKE Diffie-Hellman Group

    Specify the Diffie-Hellman group to use in IKE key exchange, whether IKEv1 or IKEv2.

    IPSec
    IPsec Rekey Interval

    Specify the interval for refreshing IPsec keys.

    Range: 3600 to 1209600 seconds (1 hour to 14 days)

    Default: 3600 seconds
    IPsec Replay Window

    Specify the replay window size for the IPsec tunnel.

    Options: 64, 128, 256, 512, 1024, 2048, or 4096 packets.

    Default: 512
    IPsec Cipher Suite

    Specify the authentication and encryption to use on the IPsec tunnel.

    Options:

    • AES 256 CBC SHA1

    • AES 256 CBC SHA 384

    • AES 256 CBC SHA 256

    • AES 256 CBC SHA 512

    • AES 256 GCM

    Default: AEM 256 GCM
    Perfect Forward Secrecy

    Specify the Perfect Forward Secrecy (PFS) settings to use on the IPsec tunnel. Choose one of the following Diffie-Hellman prime modulus groups:

    • Group-2 1024-bit modulus

    • Group-14 2048-bit modulus

    • Group-15 3072-bit modulus

    • Group-16 4096-bit modulus

    • None: disable PFS

  3. Click Add.

Applicable only to Cisco Secure Access:

Region: When you choose the region, a pair of primary and secondary region is selected. Choose the primary region that Cisco Secure Service Edge provides from the drop-down list and the secondary region is auto-selected in Cisco SD-WAN Manager. If the primary region with a unicast IP address is not reachable then the secondary region with a unicast IP address is reachable and vice versa. Cisco Secure Access ensures that both the regions are reachable at all times.


Note

You can configure any DNS server on the device which connects to HTTPS to get the public IP address. To configure a source interface for HTTPS, use the ip http client source-interface command on Cisco SD-WAN Manager.

Configure High Availability

To designate active and back-up tunnels and distribute traffic among tunnels, click High Availability and do the following:

  1. Click Add Interface Pair.

  2. In the Add Interface Pair pop-up window, configure the following:

    Field Description
    Active Interface

    Choose a tunnel that connects to the primary data center.
    Active Interface Weight

    Enter weight (weight range 1 to 255) for load balancing.

    Load balancing helps in distributing traffic over multiple tunnels and this helps increase the network bandwidth. If you enter the same weights to both the tunnels, you can achieve ECMP load balancing across the tunnels. However, if you enter a higher weight for a tunnel, that tunnel has higher priority for traffic flow.

    For example, if you set up two active tunnels, where the first tunnel is configured with weight of 10, and the second tunnel with weight configured as 20, then the traffic is load-balanced between the tunnels in a 10:20 ratio.

    Backup Interface

    To designate a back-up tunnel, choose a tunnel that connects to the secondary data center.

    To omit designating a back-up tunnel, choose None.

    Backup Interface Weight

    Enter weight (weight range 1 to 255) for load balancing.

    Load balancing helps in distributing traffic over multiple tunnels and this helps increase the network bandwidth. If you enter the same weights, you can achieve ECMP load balancing across the tunnels. However, if you enter a higher weight for a tunnel, that tunnel has higher priority for traffic flow.

    For example, if you set up two back-up tunnels, where the first tunnel is configured with weight of 10, and the second tunnel with weight configured as 20, then the traffic is load-balanced between the tunnels in a 10:20 ratio.

  3. Click Add.

Advanced Settings

(Minimum supported release: Cisco Catalyst SD-WAN Manager Release 20.14.1)

Applicable only to Zscaler:

Field

Description

Primary Datacenter

Cisco SD-WAN Manager automatically selects the primary data center closest to the WAN edge device. To route traffic to a specific Zscaler data center, choose the data center from the drop-down list.

Secondary Datacenter

Cisco SD-WAN Manager automatically selects the secondary data center closest to the WAN edge device. To route traffic to a specific Zscaler data center, choose the data center from the drop-down list.

Zscaler Location

Field

Description

Zscaler Location

Enter the name of a location that is configured on the ZIA Admin Portal.

If you do not enter a location name, the Zscaler service detects the location based on the received traffic.

For more information about locations, see ZIA Help > Traffic Forwarding > Location Management > About Locations.

Country

You can enable or disable this option only if either primary or secondary data center is set to Auto. When you choose Auto, the data center selected is within the country of the device.

Gateway Options

Field

Description

Authentication Required

See ZIA Help > Traffic Forwarding > Location Management > Configuring Locations.

Default: Off

Enable Caution

See ZIA Help > Traffic Forwarding > Location Management > Configuring Locations.

Default: Off

Enable AUP

See ZIA Help > Traffic Forwarding > Location Management > Configuring Locations.

Default: Off

XFF Forwarding

See ZIA Help > Traffic Forwarding > Location Management > Configuring Locations.

Default: Off

Enable IPS Control

See ZIA Help > Traffic Forwarding > Location Management > Configuring Locations.

Default: Off

Enable Firewall

See ZIA Help > Traffic Forwarding > Location Management > Configuring Locations.

Default: Off

Configure DNS Security

The Cisco Catalyst SD-WAN Umbrella Integration feature enables the cloud-based security service by inspecting the Domain Name System (DNS) query that is sent to the DNS server through the device. The security administrator configures policies on the Umbrella portal to either allow or deny traffic toward the fully qualified domain name (FQDN). The router acts as a DNS forwarder on the network edge, transparently intercepts DNS traffic, and forwards the DNS queries to the Umbrella cloud.

  1. From the Cisco SD-WAN Manager menu, choose Configuration > Policy Groups > DNS Security.

  2. Click Add DNS Security Policy.

Field

Description

Add DNS Security Policy

From the Add DNS Security Policy drop-down list, select Create New to create a new DNS Security Policy policy.

Create New

Displays the DNS Security Policy wizard.

Policy Name

Enter a name for the policy.

Umbrella Registration Status

 Displays the status of the API Token configuration.

Manage Umbrella Registration

Click Manage Umbrella Registration to add Cisco Umbrella Registration Key and Secret. Specific network-devices keys are used in DNS.

  • Enter Organization ID.

  • Enter Registration Key.

  • Enter Secret.

You can edit the umbrella credentials from Administration > Settings > Cloud Provider.

Match All VPN

 Click Match All VPN to keep the same configuration for all the available VPNs.

Custom VPN Configuration

choose Custom VPN Configuration to input the specific VPNs.

Local Domain Bypass List

Choose the domain bypass.

DNS Server IP

Configure DNS Server IP from the following options:

  • Umbrella Default

  • Custom DNS

DNSCrypt

Enable or disable the DNSCrypt.