ssh over vpn cisco

[lecarbajal]

Hello, i have a problem with the connection ssh v2 throught my cisco ASA, sometimes the connection of the ssh disconnected from the servers , we use VPN IPSEC and use it to connect to the server in the main office.

this is the configuration:
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 2:10:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute

Even the timeout conn is 1 hour the connection go down before that time, I dont know if this IOS version ASA804-k8 , has a bug and we are losing some connection, also we connect from windows XP 64bits to the server Linux, there is no timeout time configured in the server linux.

 

[NetRx]

Well the connection value on the ASA (timeout conn 1:00:00) is only for idle time so I'm guessing that won't be a factor here.

I would start by checking the logs on the server (if they exist) and the logs on the ASA. Bump up the logging to level 7 and send it to a syslog server with the following commands:

logging enable
logging host inside <IP address>
logging trap 7

I quickly perused the Cisco bug toolkit for any SSH-related items on ASA 8.x but came up dry when I specifically looked for your issue.

You should also check the interfaces on the intermediary devices (switches/routers) for resets, link flaps, etc...

Rich
Network Engineer - CCNA