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This document describes a configuration example for Adaptive Security Appliance (ASA) Cisco AnyConnect Secure Mobility Client access.
This document assumes that the ASA is fully operational and configured to allow the Cisco Adaptive Security Device Manager (ASDM) or Command Line Interface (CLI) to make configuration changes.
Cisco recommends that you have knowledge of these topics:
This information in this document is based on these software and hardware versions:
Note: Download the AnyConnect VPN Client package (anyconnect-win*.pkg) from the Cisco Software Download (registered customers only). Copy the AnyConnect VPN client to the ASA's flash memory, which is downloaded to the remote user computers in order to establish the SSL VPN connection with the ASA. Refer to the Installing the AnyConnect Client section of the ASA configuration guide for more information.
The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, ensure that you understand the potential impact of any command.
Adaptive Security Appliance (ASA) Cisco AnyConnect Secure Mobility Client access uses two-factor authentication with the help of One-Time Password (OTP). One must provide the correct credentials and token for an AnyConnect user to connect successfully.
Two-factor authentication utilizes two different authentication methods which can be any 2 of these.
In general, it comprises something a user knows (username and password), and something a user has (for example, an entity of information that only an individual owns like a token or certificate). This is more secure than traditional authenciation designs where a user authenticates via credentials stored either on ASA's local database or Active Directory (AD) Server integrated with ASA. One-Time Password is one of hte simplest and most popular forms of two-factor authentication for securing network access. For example, in large enterprises, Virtual Private Network access often requires the use of One-Time Passwrod tokens for remote user authentication.
In this scenario, you use OpenOTP authenication server as AAA server which uses radius protocol for communication between ASA and AAA server. User credentials are configures on the OpenOTP server which is associated with Google Authenticator Application servicing as a soft token for the two-factor authentication.
OpenOTP configuration is not covered here as it is outside the scope of this document. You can check these links for further reading.
Setting up OpenOTP
https://www.rcdevs.com/docs/howtos/openotp_quick_start/openotp_quick_start/
Configuring ASA for OpenOTP authentication
https://www.rcdevs.com/docs/howtos/asa_ssl_vpn/asa/
This packet capture was taken on ASA's outside interface connected to AAA server at 10.106.50.20.
Anyconnect License Information
Here are some links to useful information about the Cisco AnyConnect Secure Mobility Client licenses:
This section describes how to configure the Cisco AnyConnect Secure Mobility Client on the ASA.
Note: Use the Command Lookup Tool (registered customers only) in order to obtain more information on the commands used in this section.
ASDM AnyConnect Configuration Wizard
The AnyConnect Configuration Wizard can be used in order to configure the AnyConnect Secure Mobility Client. Ensure that an AnyConnect client package has been uploaded to the flash/disk of the ASA Firewall before you proceed.
Complete these steps in order to configure the Anyconnect Secure Mobility Client via the Configuration Wizard:
AnyConnect Secure Mobility Client
ASA CLI Configuration
This section provides the CLI configuration for the Cisco anyConnect Secure Mobility Client for reference purposes.
!--------------------Client pool configuration------------- ------
ip local pool ANYCONNECT-POOL 192.168.100.1-192.168.100.254 mask 255.255.255.0
!
interface GigabitEthernet1/1
nameif outside
security-level 0
ip address dhcp setroute
!
!--------------------Split ACL configuration--------------------
access-list SPLIT-TUNNEL standard permit 10.0.0.0 255.255.255.0
pager lines 24
logging enable
logging timestamp
mtu tftp 1500
mtu outside 1500
icmp unreachable rate-limit 1 burst-size 1
icmp permit any outside
asdm image disk0:/asdm-782.bin
no asdm history enable
arp timeout 14400
no arp permit-nonconnected
route outside 0.0.0.0 0.0.0.0 10.106.56.1 1
!------------------Configure AAA server --------------------
aaa-server RADIUS_OTP protocol radius
aaa-server RADIUS_OTP (outside) host 10.106.50.20
key *****
!------Configure Trustpoint containing ASA Identity Certificate ------
crypto ca trustpoint ASDM_Trustpoint 0
enrollment self
subject-name CN=bglanyconnect.cisco.com
keypair self
!-------Apply trustpoint on outside interface------
ssl trust-point ASDM_Trustpoint0 outside
!-------Enable AnyConnect and configuring AnyConnect Image------
webvpn
enable outside
anyconnect image disk0:/anyconnect-win-4.5.02033-webdeploy-k9.pkg 1
anyconnect enable
tunnel-group-list enable
!--------------------Group Policy configuration--------------------
group-policy GroupPolicy_ANYCONNECT-PROFILE internal
group-policy GroupPolicy_ANYCONNECT-PROFILE attributes
dns-server value 10.10.10.99
vpn-tunnel-protocol ssl-client
split-tunnel-policy tunnelspecified
split-tunnel-network-list value SPLIT-TUNNEL
default-domain value cisco.com
!----------Tunnel-Group (Connection Profile) Configuration----------
tunnel-group ANYCONNECT_PROFILE type remote-access
tunnel-group ANYCONNECT_PROFILE general-attributes
address-pool ANYCONNECT-POOL
authentication-server-group RADIUS_OTP
default-group-policy GroupPolicy_ANYCONNECT-PROFILE
tunnel-group ANYCONNECT_PROFILE webvpn-attributes
group-alias ANYCONNECT-PROFILE enable
: end
For configuring and installing a third-party certificate on the ASA for AnyConnect client connections, refer to this document.
Configure ASA SSL Digital Certificate
Use this section in order to confirm that your configuration works properly.
Note: The Output Interpreter Tool (registered customers only) supports certain show commands. Use the Output Interpreter Tool in order to view an analysis of show command output.
These show commands can be executed to confirm the status of AnyConnect client and its statistics.
ASA(config)# show vpn-sessiondb anyconnect
Session Type: AnyConnect
Username : cisco Index : 1
Assigned IP : 192.168.100.1 Public IP : 10.106.49.111
Protocol : AnyConnect-Parent DTLS-Tunnel
License : AnyConnect Premium
Encryption : AnyConnect-Parent: (1)none DTLS-Tunnel: (1)AES256
Hashing : AnyConnect-Parent: (1)none DTLS-Tunnel: (1)SHA1
Bytes Tx : 15122 Bytes Rx : 5897
Group Policy : GroupPolicy_ANYCONNECT-PROFILE
Tunnel Group : ANYCONNECT_PROFILE
Login Time : 14:47:09 UTC Wed Nov 1 2017
Duration : 1h:04m:52s
Inactivity : 0h:00m:00s
VLAN Mapping : N/A VLAN : none
Audt Sess ID : 000000000000100059f9de6d
Security Grp : none
ASA(config)# show vpn-sessiondb detail anyconnect filter name cisco
Session Type: AnyConnect Detailed
Username : cisco Index : 1
Assigned IP : 192.168.100.1 Public IP : 10.106.49.111
Protocol : AnyConnect-Parent DTLS-Tunnel
License : AnyConnect Premium
Encryption : AnyConnect-Parent: (1)none DTLS-Tunnel: (1)AES256
Hashing : AnyConnect-Parent: (1)none DTLS-Tunnel: (1)SHA1
Bytes Tx : 15122 Bytes Rx : 5897
Pkts Tx : 10 Pkts Rx : 90
Pkts Tx Drop : 0 Pkts Rx Drop : 0
Group Policy : GroupPolicy_ANYCONNECT-PROFILE
Tunnel Group : ANYCONNECT_PROFILE
Login Time : 14:47:09 UTC Wed Nov 1 2017
Duration : 1h:04m:55s
Inactivity : 0h:00m:00s
VLAN Mapping : N/A VLAN : none
Audt Sess ID : 000000000000100059f9de6d
Security Grp : none
AnyConnect-Parent Tunnels: 1
DTLS-Tunnel Tunnels: 1
AnyConnect-Parent:
Tunnel ID : 1.1
Public IP : 10.106.49.111
Encryption : none Hashing : none
TCP Src Port : 53113 TCP Dst Port : 443
Auth Mode : userPassword
Idle Time Out: 30 Minutes Idle TO Left : 1 Minutes
Client OS : win
Client OS Ver: 6.1.7601 Service Pack 1
Client Type : AnyConnect
Client Ver : Cisco AnyConnect VPN Agent for Windows 4.5.02033
Bytes Tx : 7561 Bytes Rx : 0
Pkts Tx : 5 Pkts Rx : 0
Pkts Tx Drop : 0 Pkts Rx Drop : 0
DTLS-Tunnel:
Tunnel ID : 1.3
Assigned IP : 192.168.100.1 Public IP : 10.106.49.111
Encryption : AES256 Hashing : SHA1
Ciphersute : AES256-SHA
Encapsulation: DTLSv1.0 UDP Src Port : 63257
UDP Dst Port : 443 Auth Mode : userPassword
Idle Time Out: 30 Minutes Idle TO Left : 0 Minutes
Client OS : Windows
Client Type : DTLS VPN Client
Client Ver : Cisco AnyConnect VPN Agent for Windows 4.5.02033
Bytes Tx : 0 Bytes Rx : 5801
Pkts Tx : 0 Pkts Rx : 88
Pkts Tx Drop : 0 Pkts Rx Drop : 0
This section provides the information you can use in order to troubleshoot your configuration.
Note: Refer to Important Information on Debug Commands before you use debug commands.
Caution: On the ASA, you can set various debug levels; by default, level 1 is used. If you change the debug level, the verbosity of the debugs can increase. Do this with caution, especially in production environments.
To troubleshoot the complete authentication process for an incoming AnyConnect client connection, you can use these debugs:
These commands confirm the user credentials are correct or not.
test aaa-server authentication <aaa_server_group> [<host_ip>] username <user> password <password>
In case of correct username and password,
ASA(config)# test aaa authentication RADIUS_OTP host 10.106.50.20
Username: cisco
Password: *****
INFO: Attempting Authentication test to IP address <10.106.50.20> (timeout: 12 seconds)
ERROR: Authentication Challenged: No error
The last error pertains to the fact that since the AAA server expects the user to enter one-time password post successful authentication of username and password, and this test does not involve a user actively entering OTP, you see Access-Challenge sent by AAA server in response to which no error is seen on the ASA.
In case of incorrect username and/or password,
ASA(config)# test aaa authentication RADIUS_OTP host 10.106.50.20
Username: cisco
Password: ***
INFO: Attempting Authentication test to IP address <10.106.50.20> (timeout: 12 seconds)
ERROR: Authentication Rejected: AAA failure
Debugs from a work setup look something like this:
AnyConnect Client Real IP: 10.106.49.111
ASA IP: 10.106.48.191
ASA(config)# debug radius all
ASA(config)# debug aaa authentication
debug aaa authentication enabled at level 1
radius mkreq: 0x8
alloc_rip 0x74251058
new request 0x8 --> 7 (0x74251058)
got user 'cisco'
got password
add_req 0x74251058 session 0x8 id 7
RADIUS_REQUEST
radius.c: rad_mkpkt
rad_mkpkt: ip:source-ip=10.106.49.111
RADIUS packet decode (authentication request)
--------------------------------------
Raw packet data (length = 180).....
01 07 00 b4 b6 c2 bf 25 cf 80 53 a9 a2 3d c8 ca | .......%..S..=..
74 05 27 5c 01 07 63 69 73 63 6f 02 12 d7 99 45 | t.'\..cisco....E
6e 0f 46 71 bc 52 47 b0 81 b4 18 ae 34 05 06 00 | n.Fq.RG.....4...
00 40 00 1e 0f 31 30 2e 31 30 36 2e 34 38 2e 31 | .@...10.106.48.1
39 31 1f 0f 31 30 2e 31 30 36 2e 34 39 2e 31 31 | 91..10.106.49.11
31 3d 06 00 00 00 05 42 0f 31 30 2e 31 30 36 2e | 1=.....B.10.106.
34 39 2e 31 31 31 04 06 0a 6a 30 bf 1a 22 00 00 | 49.111...j0.."..
00 09 01 1c 69 70 3a 73 6f 75 72 63 65 2d 69 70 | ....ip:source-ip
3d 31 30 2e 31 30 36 2e 34 39 2e 31 31 31 1a 1a | =10.106.49.111..
00 00 0c 04 92 14 41 4e 59 43 4f 4e 4e 45 43 54 | ......ANYCONNECT
2d 50 52 4f 46 49 4c 45 1a 0c 00 00 0c 04 96 06 | -PROFILE........
00 00 00 02 | ....
Parsed packet data.....
Radius: Code = 1 (0x01)
Radius: Identifier = 7 (0x07)
Radius: Length = 180 (0x00B4)
Radius: Vector: B6C2BF25CF8053A9A23DC8CA7405275C
Radius: Type = 1 (0x01) User-Name
Radius: Length = 7 (0x07)
Radius: Value (String) =
63 69 73 63 6f | cisco
Radius: Type = 2 (0x02) User-Password
Radius: Length = 18 (0x12)
Radius: Value (String) =
d7 99 45 6e 0f 46 71 bc 52 47 b0 81 b4 18 ae 34 | ..En.Fq.RG.....4
Radius: Type = 5 (0x05) NAS-Port
Radius: Length = 6 (0x06)
Radius: Value (Hex) = 0x4000
Radius: Type = 30 (0x1E) Called-Station-Id
Radius: Length = 15 (0x0F)
Radius: Value (String) =
31 30 2e 31 30 36 2e 34 38 2e 31 39 31 | 10.106.48.191
Radius: Type = 31 (0x1F) Calling-Station-Id
Radius: Length = 15 (0x0F)
Radius: Value (String) =
31 30 2e 31 30 36 2e 34 39 2e 31 31 31 | 10.106.49.111
Radius: Type = 61 (0x3D) NAS-Port-Type
Radius: Length = 6 (0x06)
Radius: Value (Hex) = 0x5
Radius: Type = 66 (0x42) Tunnel-Client-Endpoint
Radius: Length = 15 (0x0F)
Radius: Value (String) =
31 30 2e 31 30 36 2e 34 39 2e 31 31 31 | 10.106.49.111
Radius: Type = 4 (0x04) NAS-IP-Address
Radius: Length = 6 (0x06)
Radius: Value (IP Address) = 10.106.48.191 (0x0A6A30BF)
Radius: Type = 26 (0x1A) Vendor-Specific
Radius: Length = 34 (0x22)
Radius: Vendor ID = 9 (0x00000009)
Radius: Type = 1 (0x01) Cisco-AV-pair
Radius: Length = 28 (0x1C)
Radius: Value (String) =
69 70 3a 73 6f 75 72 63 65 2d 69 70 3d 31 30 2e | ip:source-ip=10.
31 30 36 2e 34 39 2e 31 31 31 | 106.49.111
Radius: Type = 26 (0x1A) Vendor-Specific
Radius: Length = 26 (0x1A)
Radius: Vendor ID = 3076 (0x00000C04)
Radius: Type = 146 (0x92) Tunnel-Group-Name
Radius: Length = 20 (0x14)
Radius: Value (String) =
41 4e 59 43 4f 4e 4e 45 43 54 2d 50 52 4f 46 49 | ANYCONNECT-PROFI
4c 45 | LE
Radius: Type = 26 (0x1A) Vendor-Specific
Radius: Length = 12 (0x0C)
Radius: Vendor ID = 3076 (0x00000C04)
Radius: Type = 150 (0x96) Client-Type
Radius: Length = 6 (0x06)
Radius: Value (Integer) = 2 (0x0002)
send pkt 10.106.50.20/1645
rip 0x74251058 state 7 id 7
rad_vrfy() : response message verified
rip 0x74251058
: chall_state ''
: state 0x7
: reqauth:
b6 c2 bf 25 cf 80 53 a9 a2 3d c8 ca 74 05 27 5c
: info 0x74251190
session_id 0x8
request_id 0x7
user 'cisco'
response '***'
app 0
reason 0
skey 'testing123'
sip 10.106.50.20
type 1
RADIUS packet decode (response)
--------------------------------------
Raw packet data (length = 80).....
0b 07 00 50 ed 7a 06 92 f7 18 16 6b 97 d4 83 5f | ...P.z.....k..._
be 9b d7 29 18 12 75 6b 35 36 58 49 4f 6e 35 31 | ...)..uk56XIOn51
58 36 4b 75 4c 74 12 24 45 6e 74 65 72 20 79 6f | X6KuLt.$Enter yo
75 72 20 54 4f 4b 45 4e 20 6f 6e 65 2d 74 69 6d | ur TOKEN one-tim
65 20 70 61 73 73 77 6f 72 64 1b 06 00 00 00 5a | e password.....Z
Parsed packet data.....
Radius: Code = 11 (0x0B)
Radius: Identifier = 7 (0x07)
Radius: Length = 80 (0x0050)
Radius: Vector: ED7A0692F718166B97D4835FBE9BD729
Radius: Type = 24 (0x18) State
Radius: Length = 18 (0x12)
Radius: Value (String) =
75 6b 35 36 58 49 4f 6e 35 31 58 36 4b 75 4c 74 | uk56XIOn51X6KuLt
Radius: Type = 18 (0x12) Reply-Message
Radius: Length = 36 (0x24)
Radius: Value (String) =
45 6e 74 65 72 20 79 6f 75 72 20 54 4f 4b 45 4e | Enter your TOKEN
20 6f 6e 65 2d 74 69 6d 65 20 70 61 73 73 77 6f | one-time passwo
72 64 | rd
Radius: Type = 27 (0x1B) Session-Timeout
Radius: Length = 6 (0x06)
Radius: Value (Hex) = 0x5A
rad_procpkt: CHALLENGE
radius mkreq: 0x8
old request 0x8 --> 8 (0x74251058), state 3
wait pass - pass '***'. make request
RADIUS_REQUEST
radius.c: rad_mkpkt
rad_mkpkt: ip:source-ip=10.106.49.111
RADIUS packet decode (authentication request)
--------------------------------------
Raw packet data (length = 198).....
01 08 00 c6 b6 c2 bf 25 cf 80 53 a9 a2 3d c8 ca | .......%..S..=..
74 05 27 5c 01 07 63 69 73 63 6f 02 12 83 c4 00 | t.'\..cisco.....
3e 56 73 71 bc 52 47 b0 81 b4 18 ae 34 05 06 00 | >Vsq.RG.....4...
00 40 00 1e 0f 31 30 2e 31 30 36 2e 34 38 2e 31 | .@...10.106.48.1
39 31 1f 0f 31 30 2e 31 30 36 2e 34 39 2e 31 31 | 91..10.106.49.11
31 3d 06 00 00 00 05 42 0f 31 30 2e 31 30 36 2e | 1=.....B.10.106.
34 39 2e 31 31 31 04 06 0a 6a 30 bf 18 12 75 6b | 49.111...j0...uk
35 36 58 49 4f 6e 35 31 58 36 4b 75 4c 74 1a 22 | 56XIOn51X6KuLt."
00 00 00 09 01 1c 69 70 3a 73 6f 75 72 63 65 2d | ......ip:source-
69 70 3d 31 30 2e 31 30 36 2e 34 39 2e 31 31 31 | ip=10.106.49.111
1a 1a 00 00 0c 04 92 14 41 4e 59 43 4f 4e 4e 45 | ........ANYCONNE
43 54 2d 50 52 4f 46 49 4c 45 1a 0c 00 00 0c 04 | CT-PROFILE......
96 06 00 00 00 02 | ......
Parsed packet data.....
Radius: Code = 1 (0x01)
Radius: Identifier = 8 (0x08)
Radius: Length = 198 (0x00C6)
Radius: Vector: B6C2BF25CF8053A9A23DC8CA7405275C
Radius: Type = 1 (0x01) User-Name
Radius: Length = 7 (0x07)
Radius: Value (String) =
63 69 73 63 6f | cisco
Radius: Type = 2 (0x02) User-Password
Radius: Length = 18 (0x12)
Radius: Value (String) =
83 c4 00 3e 56 73 71 bc 52 47 b0 81 b4 18 ae 34 | ...>Vsq.RG.....4
Radius: Type = 5 (0x05) NAS-Port
Radius: Length = 6 (0x06)
Radius: Value (Hex) = 0x4000
Radius: Type = 30 (0x1E) Called-Station-Id
Radius: Length = 15 (0x0F)
Radius: Value (String) =
31 30 2e 31 30 36 2e 34 38 2e 31 39 31 | 10.106.48.191
Radius: Type = 31 (0x1F) Calling-Station-Id
Radius: Length = 15 (0x0F)
Radius: Value (String) =
31 30 2e 31 30 36 2e 34 39 2e 31 31 31 | 10.106.49.111
Radius: Type = 61 (0x3D) NAS-Port-Type
Radius: Length = 6 (0x06)
Radius: Value (Hex) = 0x5
Radius: Type = 66 (0x42) Tunnel-Client-Endpoint
Radius: Length = 15 (0x0F)
Radius: Value (String) =
31 30 2e 31 30 36 2e 34 39 2e 31 31 31 | 10.106.49.111
Radius: Type = 4 (0x04) NAS-IP-Address
Radius: Length = 6 (0x06)
Radius: Value (IP Address) = 10.106.48.191 (0x0A6A30BF)
Radius: Type = 24 (0x18) State
Radius: Length = 18 (0x12)
Radius: Value (String) =
75 6b 35 36 58 49 4f 6e 35 31 58 36 4b 75 4c 74 | uk56XIOn51X6KuLt
Radius: Type = 26 (0x1A) Vendor-Specific
Radius: Length = 34 (0x22)
Radius: Vendor ID = 9 (0x00000009)
Radius: Type = 1 (0x01) Cisco-AV-pair
Radius: Length = 28 (0x1C)
Radius: Value (String) =
69 70 3a 73 6f 75 72 63 65 2d 69 70 3d 31 30 2e | ip:source-ip=10.
31 30 36 2e 34 39 2e 31 31 31 | 106.49.111
Radius: Type = 26 (0x1A) Vendor-Specific
Radius: Length = 26 (0x1A)
Radius: Vendor ID = 3076 (0x00000C04)
Radius: Type = 146 (0x92) Tunnel-Group-Name
Radius: Length = 20 (0x14)
Radius: Value (String) =
41 4e 59 43 4f 4e 4e 45 43 54 2d 50 52 4f 46 49 | ANYCONNECT-PROFI
4c 45 | LE
Radius: Type = 26 (0x1A) Vendor-Specific
Radius: Length = 12 (0x0C)
Radius: Vendor ID = 3076 (0x00000C04)
Radius: Type = 150 (0x96) Client-Type
Radius: Length = 6 (0x06)
Radius: Value (Integer) = 2 (0x0002)
send pkt 10.106.50.20/1645
rip 0x74251058 state 7 id 8
rad_vrfy() : response message verified
rip 0x74251058
: chall_state 'uk56XIOn51X6KuLt'
: state 0x7
: reqauth:
b6 c2 bf 25 cf 80 53 a9 a2 3d c8 ca 74 05 27 5c
: info 0x74251190
session_id 0x8
request_id 0x8
user 'cisco'
response '***'
app 0
reason 0
skey 'testing123'
sip 10.106.50.20
type 1
RADIUS packet decode (response)
--------------------------------------
Raw packet data (length = 44).....
02 08 00 2c c0 80 63 1c 3e 43 a4 bd 46 78 bd 68 | ...,..c.>C..Fx.h
49 29 23 bd 12 18 41 75 74 68 65 6e 74 69 63 61 | I)#...Authentica
74 69 6f 6e 20 73 75 63 63 65 73 73 | tion success
Parsed packet data.....
Radius: Code = 2 (0x02)
Radius: Identifier = 8 (0x08)
Radius: Length = 44 (0x002C)
Radius: Vector: C080631C3E43A4BD4678BD68492923BD
Radius: Type = 18 (0x12) Reply-Message
Radius: Length = 24 (0x18)
Radius: Value (String) =
41 75 74 68 65 6e 74 69 63 61 74 69 6f 6e 20 73 | Authentication s
75 63 63 65 73 73 | uccess
rad_procpkt: ACCEPT
RADIUS_ACCESS_ACCEPT: normal termination
RADIUS_DELETE
remove_req 0x74251058 session 0x8 id 8
free_rip 0x74251058
radius: send queue empty
RSA SecurID Authentication for AnyConnect Clients on a Cisco IOS Headend Configuration
Revision | Publish Date | Comments |
---|---|---|
2.0 |
07-Dec-2022 |
Verified PII does not exist in document.
Updated, Title, Introduction, Alt Text, SEO, machine translation, style requirements, gerunds and formatting. |
1.0 |
27-Nov-2018 |
Initial Release |