ASA VPN Cisco mobile issues
Posted on 2011-10-20
we currently allow iPhone 4 devices to remote VPN connect in to our network using Cisco IPSEC VPN client. When connected, the phones connect to Cisco call manager using SIP connection and can be used to make VOIP calls on the network.
The VPN termination device is a Cisco ASA 5510 firewall and has an installed IPS module.
we have this strange issue where by the iPhone will connect to call manager 1 minute, and then won't connect again 2 minutes later if you disconnect. The VPN connection itself is fine - it always connects. it's just the connection to call manager that only works when it wants to.
i have checked the IPS logs and can't see anything being blocked by a signature or anything like that.
has anyone else had this problem?