Daily Archives: March 29, 2016

Test AAA Server on Cisco ASA and IOS Devices

AAA, Cisco, Cisco ASA, Security, ,

When We configure AAA on Cisco ASA or any IOS device (Router/Switch), it is always a good practice to confirm that the configuration is good and the server is available and responding correctly.

Cisco IOS:

Radius Server IP Address: 10.1.2.3
Username: amolak
Password: password123

ROUTER-1#test aaa group radius server 10.1.2.3 amolak password123 legacy
Attempting authentication test to server-group radius using radius
User was successfully authenticated.

ROUTER-1#test aaa group radius server 10.1.2.3 amolak wrongpassword legacy  
Attempting authentication test to server-group radius using radius
User authentication request was rejected by server.

Cisco ASA:

Radius Servers Group Name: RADIUS-SERVERS
Radius Server IP Address: 10.1.2.3
Username: amolak
Password: password123

ASA-1# test aaa-server authentication RADIUS-SERVERS
Server IP Address or name: 10.1.2.3
Username: amolak
Password: password123
INFO: Attempting Authentication test to IP address <10.1.2.3> (timeout: 12 seconds)
INFO: Authentication Successful

ASA-1# test aaa-server authentication RADIUS-SERVERS
Server IP Address or name: 10.1.2.3
Username: amolak
Password: wrongpassword
INFO: Attempting Authentication test to IP address <10.1.2.3> (timeout: 12 seconds)
ERROR: Authentication Rejected: AAA failure

Note that you can choose the group, or specific server in the group. This makes it possible to check all servers in the group are working.

Self Signed Certificate for WebVPN on ASA

Cisco ASA, Security, VPN, ,

We will configure self signed certificate on Cisco ASA for AnyConnect (WebVPN).

1.Generate an RSA key for the certificate. The name should be unique. For example, sslvpnkeypair.

ASA-1(config)#crypto key generate rsa label sslvpnkeypair modulus 1024
INFO: The name for the keys will be: sslvpnkeypair
Keypair generation process begin. Please wait…

2. Create a trustpoint for the self-issued certificate.

ASA-1(config)#crypto ca trustpoint self

3. The fully qualified domain name is used for both fqdn and CN. The name should resolve to the ASA outside interface IP address.

ASA-1(config-ca-trustpoint)#enrollment self
ASA-1(config-ca-trustpoint)#fqdn vpn.amolak.net
ASA-1(config-ca-trustpoint)#subject-name CN=vpn.amolak.net

4. The RSA key is assigned to the trustpoint for certificate creation.

ASA-1(config-ca-trustpoint)#keypair sslvpnkeypair

5. Assign the trustpoint to be used for SSL connections on the outside interface.

ASA-1(config-ca-trustpoint)#crypto ca enroll self noconfirm
% The fully-qualified domain name in the certificate will be: vpn.amolak.net
ASA-1(config)# ssl trust-point self outside

Final Configuration:

crypto key generate rsa label sslvpnkeypair modulus 1024
!
crypto ca trustpoint self
 enrollment self
 fqdn vpn.amolak.net
 subject-name CN=vpn.amolak.net
 keypair sslvpnkeypair
!
crypto ca enroll self noconfirm
!
ssl trust-point self outside