All,
I have users connecting to an ASA using the anyconnect client, with a profile that is set to reconnect automatically. The profile is set to force all DNS lookups to go the DNS servers set on the VPN connection.
On occasions following an automatic reconnect, usually if the user loses internet connectivity very briefly (e.g less than 30 seconds) and the client reconnects DNS lookups fail and the user has to manually disconnect/reconnect for the lookups to work again.
I have tested with a packet capture on an impacted user's machine that the UDP DNS lookups appear to be being sent via the VPN connection, however no response is seen.
TCP/ICMP connections appear to work without issue over the VPN which complicates matters.
Has anyone seen this type of behaviour previously or thoughts on how to diagnose further?
thanks
