I have setup a capture on our ASA. We are trying to connect across a VPN tunnel wiht a certain app and it wont connect.
We can telnet and SSH to the device across the tunnel OK. It is just this one app that wont start.
I have a capture set up on the inside interface of our ASA and what I see are SYN packets leaving the device on our inside interface, and RST, ACK packets coming back from the device on the remote side of the tunnel.
The egress connection attempt from the device on the inside network tries the connection using a destination port of 4000. Does this mean that the device on the other end of the tunnel is not listening on port 4000?