I am planning on using a number of these IP phones at users homes, from where they can connect over the VPN client built into the phone to the ASA 5520, then once connected to the network, they can be configured to work with Asterisk.
I have attained the licensing required on the ASA as you can see below;
Licensed features for this platform:
Maximum Physical Interfaces : Unlimited
Maximum VLANs : 150
Inside Hosts : Unlimited
Failover : Active/Active
VPN-DES : Enabled
VPN-3DES-AES : Enabled
Security Contexts : 2
GTP/GPRS : Disabled
SSL VPN Peers : 10
Total VPN Peers : 750
Shared License : Disabled
AnyConnect for Mobile : Disabled
AnyConnect for Cisco VPN Phone : Enabled
AnyConnect Essentials : Disabled
Advanced Endpoint Assessment : Disabled
UC Phone Proxy Sessions : 2
Total UC Proxy Sessions : 2
Botnet Traffic Filter : Disabled
The problem I am having, is when I try and connect to the VPN from one of the IP phones, using an Anyconnect SSL connection I have configured on the ASA, I get "Failed to obtain WebVPN cookie" and it does not connect.
I have already looked at this guide https://supportforums.cisco.com/docs/DOC-21469 - but it does not really help as this only describes the process of sorting out the certificates with a CUCM, however I am using Asterisk as the call manager.
Can someone please explain what needs to be done to get this working? I have tried to search for answers but not getting anywhere, I cant find anything online about this.