Security Profiles

A security profile typically refers to a set of rules and configurations applied to network traffic to enforce security policies. These profiles include the following protective measures:

  • Firewall Rules

  • Intrusion Prevention Systems (IPS)

  • Antivirus/Antimalware

  • Web Filtering

  • Data Loss Prevention (DLP)

  • Application Control

These particular profiles are generally added to a policy rule, policy rule set, or a policy rule set group and ordered by priority.

Decryption Profile

A decryption profile is used by the Multicloud Defense Gateway in a reverse proxy or forward proxy scenario. When a connection is proxied, the front-end session is terminated on the gateway and a new back-end session is established to the server. The intention of this termination is to decrypt and inspect the traffic to protect against malicious activity. In order to decrypt encrypted traffic, a decryption profile is necessary.

TLS Versions in your Decryption Profile

The Multicloud Defense Gateway supports all TLS versions (TLS 1.3, TLS 1.2, TLS 1.1, TLS 1.0). Users can specify a minimum TLS version to use and Multicloud Defense Gateway will negotiate a TLS version that is equal to or higher than the specified minimum TLS version. The gateway always uses the highest TLS version possible combined with the strongest cipher suite during the TLS negotiation. In the case where the Multicloud Defense Gateway cannot negotiate a version that meets the minimum TLS version specified, the gateway drops the session and logging a TLS_ERROR event.


Note

Only a single minimum TLS version can be applied to a gateway. A consistent minimum TLS version must be used across all decryption profiles referenced by all service objects that are used within a policy ruleset or policy ruleset group. If different minimum TLS versions are specified, the minimum TLS version that will be applied cannot be predetermined.

Cipher Suites

The Multicloud Defense Gateway supports a set of default and user-selectable cipher suites. The default set are PFS cipher suites that are always selected. The user-selectable set are Diffie-Hellman and PKCS (RSA) cipher suites that can be selected by the user. The combined set of cipher suites (default and user-selected) are used by the gateway for establishing a secure front-end encrypted session. The client will send an ordered list of preferred cipher suites. The gateway will respond with a cipher suite chosen from the ordered set submitted by the client and the set available by the gateway. If the client allows the server to define the order, then the cpher suite chosen is from the ordered set available by the gateway and the set submitted by the client.

With version 24.10 and later, the Multicloud Defense Controller assists the creation of your decryption profile by auto-selecting the strongest cipher suites once you've chosen the minimum TLS version. Note that both the Multicloud Defense Controller and the Multicloud Defense Gateway must be running at least version 24.10. Older gateway versions do not support this automated help feature and you cannot edit the ciphers suites of an existing decrpytion profile. We strongly recommend updating your gateway to match at least version 24.10 to take advantage of this functionality.

The following is an ordered list of cipher suites supported by the gateway and available in a decryption profile:

Category

Cipher Suite

Key Exchange

Cipher

Hash

Default

PFS

ECDHE-RSA-AES256-GCM-SHA384

ECDHE-RSA

AES256-GCM

SHA384

✅

PFS

ECDHE-RSA-AES256-CBC-SHA384

ECDHE-RSA

AES256-CBC

SHA384

✅

Diffie-Hellman

DH-RSA-AES256-GCM-SHA384

DH-RSA

AES256-GCM

SHA384

PFS

DHE-RSA-AES256-GCM-SHA384

DHE-RSA

AES256-GCM

SHA384

✅

PFS

DHE-RSA-AES256-CBC-SHA256

DHE-RSA

AES256-CBC

SHA384

✅

PFS

DHE-RSA-AES256-CBC-SHA

DHE-RSA

AES256-CBC

SHA

✅

Diffie-Hellman

DH-RSA-AES256-SHA256

DH-RSA

AES256-CBC

SHA256

Diffie-Hellman

DH-RSA-AES256-SHA

DH-RSA

AES256-CBC

SHA160

PKCS (RSA)

AES256-GCM-SHA384

PKCS-RSA

AES256-GCM

SHA384

PKCS (RSA)

AES256-SHA256

PKCS-RSA

AES256-CBC

SHA256

PKCS (RSA)

AES256-SHA

PKCS-RSA

AES256-CBC

SHA160

PFS

ECDHE-RSA-AES128-GCM-SHA256

ECDHE-RSA

AES128-GCM

SHA256

✅

PFS

ECDHE-RSA-AES128-CBC-SHA256

ECDHE-RSA

AES128-CBC

SHA256

✅

Diffie-Hellman

DH-RSA-AES128-GCM-SHA256

DH-RSA

AES128-GCM

SHA256

PFS

DHE-RSA-AES128-GCM-SHA256

DHE-RSA

AES128-GCM

SHA256

✅

PFS

DHE-RSA-AES128-CBC-SHA256

DHE-RSA

AES128-CBC

SHA256

✅

Diffie-Hellman

DH-RSA-AES128-SHA256

DH-RSA

AES128-CBC

SHA256

Diffie-Hellman

DH-RSA-AES128-SHA

DH-RSA

AES128-CBC

SHA160

PKCS (RSA)

AES128-GCM-SHA256

PKCS-RSA

AES128-GCM

SHA256

PKCS (RSA)

AES128-SHA256

PKCS-RSA

AES128-CBC

SHA256

PKCS (RSA)

AES128-SHA

 PKCS-RSA

AES128-CBC

SHA160

PFS

ECDHE-RSA-DES-CBC3-SHA

ECDHE-RSA

DES-CBC3

SHA

✅

PFS

ECDHE-RSA-RC4-SHA

ECDHE-RSA

RC4

SHA

✅

PKCS (RSA)

RC4-SHA

PKCS-RSA

RC4

SHA160

PKCS (RSA)

RC4-MD5

PKCS-RSA

RC4

SHA160

Create a Decryption Profile

Use the following procedure to create a decryption profile.

Procedure

Step 1

Navigate to Policies > Profiles > Decryption.

Step 2

Click Create.

Step 3

Specify a Profile Name and a Description.

Step 4

For Certificate Method choose Select Existing.

Step 5

For Certificate choose the desired certificate.

Step 6

For Min TLS Version choose the lowest TLS version that is accepted by the decryption profile. The default is TLS 1.0.

Step 7

If using non-default (non-PFS) cipher suites, select the set of desired cipher suites from the Diffie- Hellman or PKCS (RSA) menus.

Step 8

Click Save.

What to do next

Attach the profile to a policy rule set. See Rule Sets and Rule Set Groups for more information.

Network Intrusion (IDS/IPS) Profile

Network intrusion profiles are a collection of Intrusion Detection and Protection (IDS/IPS) rules that can be used to evaluate transactions to ensure the traffic is not malicious.

An Intrusion Detection System (IDS) is defined as a solution that monitors network events and analyzes them to detect security incidents and imminent threats, specifically suspicious or abnormal activity such as malicious transactions, and sends immediate alerts when it is observed. IDS searches for and against hosts and networks.

An Intrustion Protection System (IPS) actively analyzes network traffic and compared it against known attack patterns and signatures. When the system detects suspicious traffic, it blocks it from entering the network. IPS rules cover both network-bsed IPs and host-based IPs.

Multicloud Defense combines both of these systems within a singular profile to create an easy-to-configure network intrusion profile made to detect malicious probes or new network patterns from a compromised system that both detects, rejects, and reports supsicious traffic. Preemptive blocking and reporting can mitigate any downtime on your network and further improve blocking activity in the future. A network intrusion profile in Multicloud Defense is compiled of the following rule sets:

Table 1. Multicloud Defense supports the following IDS/IPS Rule Sets

Rule Sets

Description

Talos Rules

The Talos rules are a premium set of rules from Cisco based on intelligence gathered from real-world investigations, penetration tests and research that provide an advanced level of protection for applications and frameworks.

Note that the IDS/IPS profile does not include web applications that might be malicious. See Web Application Firewall (WAF) Profile for more information.

Create an IPS/IDS Profile

Use the following procedure to create and add an IPS/IDS profile to a ruleset:

Procedure

Step 1

Navigate to Policies > Profiles > IPS/IDS.

Step 2

Click Create.

Step 3

Click into the General Settings tab.

Step 4

Enter a unique Profile Name.

Step 5

(Optional) Enter a Description. This may help differntiate between other profiles with a similar name.

Step 6

Toggle the Threat PCAP option file if the IDS/IPS Profile detects malicious activity. Note that if you toggle this option on, you must have a PCAP profile attached to the gateway.

Step 7

In the Rule Set section of the general settings, note that at least one ruleset from a rules library (Talos, Custom) is required to be specified in the IDS/IPS profile. If Talos rules and custom rulesets are used, at least one of the two must be enabled. If the desire is to disable the entire IDS/IPS Profile, remove the IDS/IPS Profile from any policy ruleset so the IDS/IPS profile will not be evaluated. Use the drop-down menu to select one of the followingsettings that are applied to all rulsets within this profile:

  • Disabled - Specify whether to disable the use of Talos rules.

  • Manual - Specify the Talos rule's version.

  • Automatic - Specify the number of days from publish date to delay automatic update to the latest Talos rule's version.

Use the other drop-down menu to select when the rules within this profile are updated. You can opt to update the rule set Immediately after Talos sends out an update, or any number of days after the update.

Step 8

Click Talos Rules: Policy and choose from the table which policy profile to use as a base. You can only select one profile.

Unless your window view is maximized, scroll to the right of the window and assign an action for the selected profile:

  • Rule Default - Allow or Deny the requests based on the action specified in each triggered Rule and log an Event.

  • Allow Log - Allow the requests and log an event.

  • Allow No Log - Allow the requests and do not log an event.

  • Deny Log - Deny the requests and log an event.

  • Deny No Log - Deny the requests and do not log an event.

Step 9

Click the Talos Rules: Category tab and choose at least one category from the table to the profile.

Step 10

Click the Talos rules: Class tab and choose at least one class from the table to the profile.

Step 11

At the top of the screen click into the Advanced Settings tab.

Step 12

Under Rule Supression click Add and enter a valid Source IP/CIDR List of IP addresses and a corresponding Rule ID List. To remove a row of lists simply click the minus icon to the right of the row.

Step 13

Under Event Filtering: Profile Event Filtering, enter the following information:

  • Type - You can opt for either Rate or Sample. Generated events are rate- or sample-limited based on the specified Number of Events triggered over a Time evaluation interval (in seconds).

  • Number of Events - Manually enter a value of allowed number of events.

  • (Available for the Rate type) Time (Seconds) - enter a numerical value in seconds.

Step 14

Under Event Filtering: Rule Event Filtering, click Add. Enter the following information:

  • Rule ID List - Specify a comma-separated list of rule IDs.

  • Number of Events - Manually enter a value of allowed number of events.

  • (Available for the Rate type) Time (Sec) - enter a numerical value in seconds.

  • Type - Select either Rate or Sample. Generated events are rate- or sample-limited based on the specified Number of Events triggered over a Timeevaluation interval (in seconds).

Step 15

Under the Rule Setting List section of the advanced settings, click Add and enter the following:

  • Source IP/CIDR List - provide a comma-separated list of IPs or CIDRs

  • Rule ID List - provide a comma-separated list of rule IDs. Note that for high number rules, only the rule ID is necessary. For low number rules, the GID and ID need to be specified for the rule ID as GID:ID. An example is 119:3.

  • Action - Select an action for when the source IP/CIDR list or rule ID list is triggered on. Note that if a rule is suppressed, no action is taken and no logs are sent or captured.

    • Allow Log - Allow the requests and log an event.

    • Allow No Log - Allow the requests and do not log an event.

    • Deny Log - Deny the requests and log an event.

    • Deny No Log - Deny the requests and do not log an event.

What to do next

Attach the profile to a policy rule set. See Rule Sets and Rule Set Groups for more information.

Data Loss Prevention (DLP) Profile

The DLP (Data Loss Prevention) profile provides Multicloud Defense customers with the ability to specify policy rules to detect and take action upon finding exfiltration patterns in the data when the Multicloud Defense solution is deployed in the forward proxy (egress) mode.

Multicloud Defense allows customers to specify common pre-packaged data patterns such as Social Security Numbers (SSN), AWS secrets, credit card numbers etc., in addition to custom PCRE based regular expression patterns. This makes it easy to enforce protections for PCI, PII, and PHI data to meet compliance requirements. This feature is integrated with the existing Multicloud Defense feature set requiring no separate DLP services.

Create a Data Loss Prevention Profile

Procedure

Step 1

Navigate to Policies > Profiles > Data Loss Prevention.

Step 2

Click Create Intrusion Profile.

Step 3

Select Data Loss Prevention.

Step 4

Provide a unique Name and enter a description for the profile.

Step 5

Enter the DLP FIlter List in the table.

Step 6

Click Add to insert more rows as needed.

Step 7

Provide a Description for the filter.

Step 8

Choose a predefined static pattern (e.g CVE Number) from the dropdown list or provide a custom Regular expression.

Step 9

Provide a count to define the number of times the pattern must be seen in the traffic.

Step 10

Select an Action to take if the pattern matches the count number of times.

Note

 

There are cases where the pre-defined pattern for AWS Access Key and AWS Secret Key doesn’t match in DLP inspection due to pattern being more restrictive. Use the following relaxed custom pattern in DLP profile to detect AWS Access Key and AWS Secret Key. Be aware that this could generate false positives log events.

AWS Access Key: (?<![A-Z0-9])[A-Z0-9]{20}(?![A-Z0-9])

AWS Secret Key: (?<![AZa-z0-9/+=])[A-Za-z0-9/+=]{40}(?![A-Za-z0-9/+=])

What to do next

Attach the profile to a policy rule set. See Rule Sets and Rule Set Groups for more information.

Anti-Malware Profile

An anti-malware profile prevent malware attacks by scanning all incoming data to prevent malware from being installed and infecting a computer. Antimalware programs can also detect advanced forms of malware and offer protection against ransomware attacks. Currently, the Talos ClamAV virus detection engine is a large portion of the profile. ClamAV® is an antivirus engine for detecting trojans, viruses, malware and other malicious threats.

If you opt to create an anti-malware profile, we strongly recommend immeidately adding it to a policy by being configured to a rule.

Create an Anti-Malware Profile

Procedure

Step 1

Navigate to Policies > Profiles > Anti Malware.

Step 2

Select Anti-malware.

Step 3

Provide a unique Name and enter a description.

Step 4

Select one of the following modes for Talos ruleset:

  • Manual Mode - select the Talos Ruleset Version from dropdown. The selected ruleset version is used by the Multicloud Defense datapath engine on all Gateways which use this profile and is not automatically updated to newer ruleset versions.

  • Automatic Mode - select how many days to delay the deployment by, after the ruleset version is published by Multicloud Defense. New rulesets are published daily by Multicloud Defense and the gateways using this profile are automatically updated to the latest ruleset version which is N days or older, where N is the "delay by days" argument selected from the dropdown. For example, if you select to delay the deployment by 5 days on Jan 10, 2024, the Multicloud Defense Controller will select a ruleset version which was published on Jan 5th or before. Note that Multicloud Defense may not publish on some days if our internal testing with that ruleset version fails for some reason.

Step 5

Select the desired Action to take when a match for a virus signature is found.

What to do next

Attach the profile to a policy rule set. See Rule Sets and Rule Set Groups for more information.

Web Application Firewall (WAF) Profile

Web protection profiles are a collection of Web Application Firewall (WAF) rules that can detect and block known web application attacks. You can configure WAF profiles to use signatures and constraints to examine web traffic. You can also enforce an HTTP method policy, which controls the HTTP method that matches the specified pattern. It typically protects web applications from attacks such as cross-site forgery, cross-site-scripting (XSS), file inclusion, and SQL injection, among others.

Table 2. Supported WAF rule sets

Rulesets

Description

Core Rules

The core rules are a standard set of rules from ModSecurity CRS (Core Rule Set) that provide a base level of protection for any web application.

Trustwave Rules

The Trustwave rules are a premium set of rules from ModSecurity based on intelligence gathered from real-world investigations, penetration tests and research that provide an advanced level of protection for specific web applications and frameworks.

Custom Rules

The custom rules are a particular set of rules written by customers that provide a specialized level of protection for custom web applications.

Note that the WAF profile does not include malicious IPs. See Malicious IP Profile and Network Intrusion (IDS/IPS) Profile for more information.

Create WAF Profile

Use the following procedure to create a WAF profile.


Note

If core Rulesets are specified, the core rules cannot be disabled. In order to disable the core rules, remove all core rulesets from the WAF profile so they will not be evaluated.

Procedure

Step 1

Navigate to Policies > Profiles > WAF.

Step 2

Click Create.

Step 3

Specify the following general settings:

  1. Enter a unique Profile Name.

  2. (Optional) Enter a Description. This may help differentiate between profiles with a similar name.

  3. Specify the action:

    • Rule Default - Allow or deny the requests based on the action specified in each triggered rule and log an event.

    • Allow Log - Allow the requests and log an event.

    • Deny Log - Deny the requests and log an event.

  4. Specify whether to generate a Threat HAR file if the WAF profile detects malicious activity. The gateway should have a Pcap profile attached, for this to work.

  5. Specify whether to generate a HTTP Request HAR file if the WAF profile detects malicious activity.

  6. In the RULE SETSsection, in the vertical tab located to the left, click Core Rules. You must specify at least one ruleset from a rules library (Core, Trustwave, Custom):

    • Specify the following:

      • Manual - Specify the core rules version to use.

      • Automatic - Specify the numbers of days from publish date to delay automatic update to the latest core rules version.

    • Identify the rules you want to add to the profile and click Add to Profile. The selections appear in the table located to the right.

  7. In the vertical tab located to the left, click Trustwave Rules.

    • Specify the following:

      • Disabled - Specify whether to disable the use of Trustwave rules.

      • Manual - Specify the Trustwave rules version to use.

      • Automatic - Specify the number of days from publish date to delay automatic update to the latest Trustwave rules version.

    • Identify the rules you want to add to the profile and click Add to Profile. The selections appear in the Profile Selections table located to the right.

  8. In the vertical tab located to the left, click Custom Rules.

    • Specify one of the following options:

      • Disabled - Specify whether to disable the use of custom rules.

      • Manual - Specify the custom rules version to use.

      • Automatic - Specify the number of days from publish date to delay automatic update to the latest custom rules version.

    • Identify the rules you want to add to the profile and click Add to Profile. The selections appear in the Profile Selectionstable located to the right.

Step 4

Scroll to the top of the window and click the Advanced Settings tab:

  1. Under "Rule Suppression", click Add to add one or more rows for rules. Rules can be suppressed for a specific IP or a list of CIDRs:

    • For Source IP/CIDR List, provide a comma-separated list of IPs or CIDRs.

    • For Rule ID List, provide a comma-separated list of rule IDs.

  2. Under "Event Filtering" provide the following information:

    • Type - Rate or Sample

    • Number of Events

    • Time (Seconds)

  3. Under "Rule Event Filtering" click Add to add one or more rows for rules. For every new row you create, enter a valid Rule ID List, Number of Events, Time (Sec), and choose either Type or Sample as the Type.

  4. Under "Core Rule Set", select a value for both the Request Anomaly and Response Anomaly. Note that using a value less than 3 for the "Request Anomaly" results in a huge volume of alerts.

  5. Select the Paranoia Level. Your options range from 1–4.

Step 5

Click Save.

What to do next

Attach the profile to a policy rule set. See Rule Sets and Rule Set Groups for more information.

Event Filtering

To reduce the number of security events that are generated when the WAF Profile is triggered, the Event Filtering under Advanced Settings can be configured to rate limit or sample the events. The configuration does not alter the detection or protection behavior.

When specifying Type as Rate, the generated events are rate limited based on the specified Number of Events triggered over a Time evaluation interval (in seconds). For example, if Number of Events is specified as 50 and Time is specified as 5 seconds, only 10 events per second will be generated.

When specifying Type as Sample, the generated events are sampled based on the specified Number of Events. For example, if Number of Events is specified as 10, only 1 event will be generated for every 10 events triggered.

Profile Event Filtering

Profile Event Filtering applies to all rules that are configured in the WAF Profile:

  • Specify the Type as Rate or Sample:

    • Rate- Specify the Number of Events and the Time evaluation interval (in seconds).

    • Sample- Specify the Number of Events.

Rule Event Filtering

To reduce the number of security events that are generated when the WAF profile is triggered, event filtering can be configured to rate limit or sample the events. The configuration does not alter the detection or protection behavior.

Rule event filtering applies to specific rules that are configured in the WAF profile.

Procedure

Step 1

Click Add under Rule Event Filtering.

Step 2

For Rule ID List, specify a comma-separated list of Rule IDs.

Step 3

Specify Type as Rate or Sample.

  • Rate- Specify the Number of Events and the Time evaluation interval (in seconds).

  • Sample- Specify the Number of Events.

What to do next

Associate WAF Profile with a Policy Rule

Create L7 DoS Profile

Multicloud Defense Gateways provide the ability to monitor, detect, and remediate application layer attacks by continuously monitoring the client requests to a backend web server. Layer 7 DoS attacks are targeted at depleting web server resources, affecting service availability by sending many HTTP requests. This feature is enabled when the gateways are enabled to proxy inbound connections to a backend web service to maintain availability of web based applications. Enabling this feature also allows the gateways to provide additional security for cases where a frontend load balancer may not support, or, may not be optimized to detect and remediate against application DoS attacks.

This feature can also be used to provide DoS protection against backend web servers hosting API services.

Procedure

Step 1

Navigate to Policies > Profiles > Layer 7 DOS.

Step 2

Select Layer 7 DOS.

Step 3

Provide a unique Profile Name.

Step 4

(Optional) Enter a Description. This may help differentiate between other profiles that may have similar names.

Step 5

Add Request Rate Limits.

Limiting excessive requests to a resource is based on the following parameters. The values for these parameters should be based on measuring and understanding the traffic patterns for your web services to be protected by the Layer 7 DoS option.

Table 3. Parameters

Parameter

Description

URI

A relative URI used to indicate the path to limit requests for a resource. For example, if you intend to monitor and protect your service resource at https://www.example.com/login.html, you would enter /login.html as the URI parameter in the Request Rate Limits table.

HTTP Methods

HTTP methods can be specified per-resource URI to control which HTTP methods in the client requests are rate limited and which ones are not. You can select multiple methods from the drop down for each row in the table. An empty HTTP method list means that method is ignored and the rate applies to all calls to the resource.

Note

 

The rate is applied for each resource; therefore, multiple methods share the rate limit specified in the Request Rate in that row. For example, if the rate is 3 requests for every second, and GET, POST and PUT are specified in the HTTP Methods, and 2 GETs and 1 POST happen to that URI from a single client IP in the same second, a PUT will NOT be allowed in that same second.

Request Rate

The number of requests for every second. It determines the rate at which a single client can send requests to the URI resource mentioned in the URI part of the rule.

Burst Size

Specifies the maximum number of simultaneous requests that a client can send to the URI resource mentioned in the URI part of the rule. Any requests beyond this threshold, arriving at the proxy at the same time, will not be sent to the backend server.

Step 6

Click Save when completed. The order of the rules is important based on the URI as the rules are checked from the top down and applied on first match. If the URI added higher in the list includes a resource path that includes resources in the rules below it, the first rule matched will be applied.

What to do next

URL (Uniform Resource Locator) Filter Profile

A URL filtering profile evaluates the URL of an HTTP request and applies an action to either allow or deny the traffic. In order to evaluate the URL, the traffic must be processed by a Forward Proxy rule. The set of URLs in the profile can be specified as strings representing the full path or as strings representing a Perl Compatible Regular Expression (PCRE). If only domain filtering is required, it is best to use an FQDN filtering profile. An FQDN filtering profile can also be used in conjunction with URL filtering, where the domain is evaluated using the FQDN filtering profile and the URL is evaluated using the URL filtering profile.

The URL filtering profile can use a set of pre-defined categories. To view more information on categories, please see FQDN / URL Filtering Categories.


Note

The URL filtering is organized as a table containing user-specified rows (URLs and Categories) along with two default rows (Uncategorized and ANY). Categories and URLs can be combined within each row if desired.

The limits for each URL filtering profile are as follows:

  • Maximum user-specified rows: 254 (Standalone or a group of standalones)

  • Maximum Categories and URLs per row: 60

  • Maximum URL character length: 2048

When specifying a multi-level domain (e.g., `www.example.com`), it's important to escape the `.` character (e.g., `www\.example\.com`) otherwise it will be treated as a wildcard for any single character

Uncategorized

  • The penultimate row in a URL filtering profile, which is represented as Uncategorized.

  • Specifies the policy action to take for URLs that do not match the user-specified URLS or do not have a category.

  • If a standalone profile is used in a group profile and the group profile is applied to a policy ruleset, the Uncategorized row will be taken from the group profile. The Uncategorized row of a standalone profile is only applicable if the standalone profile is directly applied to a policy ruleset.

Default (ANY)

  • The final row in a URL filtering profile, which is represented as ANY.

  • Specifies the policy action to take for URLs that do not match the user-specified URLs or categories, or are not uncategorized.

  • If a standalone profile is used in a group profile and the group profile is applied to a policy ruleset, the ANY row will be taken from the group profile. The ANY row of a standalone profile is only applicable if the standalone profile is directly applied to a policy ruleset.

Create the URL Filtering Profile

Use the following procedure to create a standalone URL filtering profile:

Procedure

Step 1

Navigate to Policies > Profiles > URL Filtering.

Step 2

Click Create.

Step 3

Provide a unique Name.

Step 4

(Optional) Enter a Description. This may help differenatiate between other profiles with similar names.

Step 5

Click Add to create a new row.

Step 6

Specify individual URLs (e.g., https://www.google.com):

  • Each URL is specified as a PCRE (Perl Compatible Regular Expression).

  • Each URL must be specified as a full path.

  • Consider escaping the decimal "." character else it will be treated as a single character wildcard.

Step 7

Specify Categories (e.g., Gambling, Sports, Social Networking).

Step 8

Specify the HTTP methods to which the policy is applied.

Step 9

Select on of the following as a subset of methods:

  • Delete

  • Get

  • Head

  • Options

  • Patch

  • Post

  • Put

Step 10

Specify All for all methods.

Step 11

Specify the policy Action for the user-specified URLs/Categories, Uncategorized and ANY rows:

  • Allow Log - Allow the requests and log an event.

  • Allow No Log - Allow the requests and do not log an event.

  • Deny Log - Deny the requests and log an event.

  • Deny No Log - Deny the requests and do not log an event.

Step 12

Specify the Return Status Code.

Step 13

Specify an integer value greater than or equal to 100 and less than 600. The value represents the HTTP status that will be returned to the client making the request. A common return code is 503.

Step 14

Click Save.

What to do next

Attach the profile to a policy rule set. See Rule Sets and Rule Set Groups for more information.

Fully Qualified Domain Name Filter Profile

A Fully Qualified Domain Name (FQDN) filter profile evaluates the FQDN associated with traffic and applies an action to either allow or deny the traffic. In order to evaluate the FQDN, traffic must be TLS encrypted and contain an FQDN in the SNI field of a TLS hello header. The FQDN can be evaluated for traffic that is processed by either a Forwarding or Forward Proxy rule. The set of FQDNs in the profile can be specified as strings representing the full domain or as strings represented by a Perl Compatible Regular Expression (PCRE). If only domain allowlisting is required, it is best to use an FQDN filtering profile. An FQDN filtering profile can also be used in conjunction with a URL filtering profile, where the domain is evaluated using the FQDN filtering profile and the URL is evaluated using the URL filtering profile.

Use FQDN filtering to filter categories that you want to allow or deny based on criteria, after a rule match. You can set filters at a granular level. The FQDN filter rows contain log-related actions such as deny or allow that you can use.

The FQDN filtering profile can also use a set of pre-defined categories. To view more information on categories, see FQDN / URL Filtering Categories.


Note

The FQDN filtering profile is organized as a table containing user-specified rows (FQDNs and categories) along with two default rows (Uncategorized and ANY). Categories and FQDNs can be combined within each row if desired.

The limits for each FQDN filter profile are as follows:

  • Maximum user-specified rows: 254 (standalone or group of standalones)

  • Maximum categories and FQDNs per row: 60

  • Maximum FQDN character length: 255

When specifying a multi-level domain (e.g., 'www.example.com'), it's important to escape the `.` character (e.g.,`www\.example\.com`) otherwise it will be treated as a wildcard for any single character.

Standalone vs. Group

A FQDN filter profile can be specified as standalone or group.

A standalone FQDN filter profile contains FQDNs and categories. The profile will be applied directly to a set of one or more policy rulesets or associated with a FQDN group profile.

A FQDN filter group profile contains an ordered list of standalone profiles that can be defined for different purposes and combined together into a group profile. The group profile can be applied directly to a set of one or more policy rulesets. Each team can create and manage specific standalone profiles. These standalone profiles can be combined together into a group profile to create hierarchies or different combinations based on the use case. An example combination could be a global FQDN list that would apply to everything, a CSP-specific list that would apply to each different CSP, and an application-specific list that would apply to each different application.

Uncategorized

  • The second-to-last row in an FQDN filter profile which is represented as Uncategorized.

  • Specifies the policy action to take for FQDNs that do not match the user-specified FQDNs or do not have a category.

  • If a standalone profile is used in a group profile and the group profile is applied to a policy ruleset, the Uncategorized row will be taken from the group profile. The Uncategorized row of a standalone profile is only applicable if the standalone profile is directly applied to a policy ruleset.

Default (ANY)

  • The final row in an FQDN filter profile, which is represented as ANY.

  • Specifies the policy action to take for FQDNs that do not match the user-specified FQDNs or categories, or are not Uncategorized.

  • If a standalone profile is used in a group profile and the group profile is applied to a policy ruleset, the ANY row will be taken from the group profile. The ANY row of a standalone profile is only applicable if the standalone profile is directly applied to a policy ruleset.

Create a Standalone FQDN Filter Profile

Use the following procedure to create a standalone FQDN filter profile:

Procedure

Step 1

Navigate to Policies > Profiles > FQDN Filtering.

Step 2

Click Create.

Step 3

Provide a unique Name.

Step 4

(Optional) Enter a Description. This may help differentiate between profiles with a similar name.

Step 5

Specify the Type as Standalone.

Step 6

Click Add to create a new row.

Step 7

Specify individual FQDNs (for example, google.com).

  1. Each FQDN is specified as a PCRE (Perl Compatible Regular Expression).

  2. Consider escaping the "." character else it will be treated as a single character wildcard.

Step 8

Specify a Category (for example, Gambling, Sports, Social Networking).

Step 9

Specify the policy Action for the user-specified FQDNs/Categories, Uncategorized and ANY rows.

  • Allow Log - Allow the requests and log an event.

  • Allow No Log - Allow the requests and do not log an event.

  • Deny Log - Deny the requests and log an event.

  • Deny No Log - Deny the requests and do not log an event.

Step 10

(Optional) Specify Decryption Exception for any FQDNs where decryption is not desired or possible. Possible reasons for considering decryption exception include:

  • Desire to not inspect encrypted traffic (for example, financial services, defense, health care, etc.).

  • SSO authentication traffic where decryption is not possible.

  • NTLM traffic that cannot be proxied.

Step 11

Click Save when completed.

What to do next

Attach the profile to a policy rule set. See Rule Sets and Rule Set Groups for more information.

Create a Group FQDN Filter Profile

Use the following procedure to create a group FQDN filter profile with at least two standalone profiles:

Procedure

Step 1

Navigate to Policies > Profiles > FQDN Filtering.

Step 2

Click Create.

Step 3

Provide a unique Name.

Step 4

(Optional) Enter a Description. This may help differentiate between profiles that may have a similar name.

Step 5

Specify the Type as Group.

Step 6

Select an initial standalone profile (at least one standalone profile is required).

Step 7

Click Add FQDN Profile to create a new row for additional profiles.

Step 8

Select a standalone profile.

Step 9

Specify the policy Action for uncategorized FQDNs.

Step 10

Specify the policy Action for ANY FQDNs (default).

Step 11

(Optional) Specify the Decryption Exception for uncategorized or ANY if decryption is not desired or possible. Possible reasons for considering decryption exception include:

  • Desire to not inspect encrypted traffic (financial services, defense, health care, etc.).

  • SSO authentication traffic where decryption is not possible.

  • NTLM traffic that cannot be proxied.

Step 12

Click Save.

What to do next

Attach the profile to a policy rule set. See Rule Sets and Rule Set Groups for more information.

Malicious IP Profile

Additional security protections can be enabled to prevent communication from and to known malicious IPs. These malicious IPs are defined by Trustwave and integrated into Multicloud Defense as a security profile ruleset. The ruleset is updated frequently as updates are made available by Trustwave. The updates can be either dynamically or manually applied to a policy ruleset using the automatic update configuration or manual update configuration. For more information, see Create a Malicious IP Profile.


Note

Malicious IP are identified by Trustwave based on various learned behavior:

  • Malicious attackers identified from web honeypots

  • Botnet C&C hosts

  • TOR exit nodes

  • Other learned behavior

Create a Malicious IP Profile

Use the following procedure to create a malicious IP profile:

Procedure

Step 1

Navigate to Policies > Profiles > Malicious IPs.

Step 2

Click Create.

Step 3

Provide a unique Profile Name.

Step 4

(Optional) Enter a Description. This can help differentiate between other profiles with similar names.

Step 5

Check the box to enable IP Reputation.

Step 6

Choose one of the two options for the Trustwave Ruleset Version drop-down menu:

  • Manual - The selected ruleset version is used by the Multicloud Defense datapath engine on all gateways which use this profile. The profile will not be automatically updated to newer ruleset versions.

  • Automatic - Select the number of days to delay the update, after the ruleset version is published by Multicloud Defense. New rulesets are published frequently by Multicloud Defense. The gateways using this profile are automatically updated to the latest ruleset version which is N days or older, where N is the "delay by days" argument selected from the dropdown. For example, if you select to delay the deployment by 5 days on Jan 10, 2021, the Multicloud Defense controller will select a ruleset version which was published on Jan 5th or before. Note that Multicloud Defense may not publish on some days if our internal testing with that ruleset version fails for some reason.

Step 7

Click Save.

What to do next

Attach the profile to a policy rule set. See Rule Sets and Rule Set Groups for more information.

IP Reputation

The IP reputation checkbox is used as a means to enable or disable the profile. When checked and the profile is attached to a policy ruleset, malicious IP protection will be enforced. When unchecked and the profile is attached to policy rules, malicious IP protection will not be enforced. Our recommendation is to always check the IP reputation checkbox. If you want to disable the malicious IP profile, then remove its association from the policy rules rather than uncheck the checkbox.