ASA 5505 + ASA 5540 static VPN, ssh and rdp problems

Question

Greetings!
I've recentely set up a VPN between Cisco ASA 5540(8.4) ana 5505(8.3).
Everything works fine, but there is a small problem that is really annoying me.
From the inside network behind ASA 5505 I connect via rdp or ssh to a host inside ASA 5540.
Then I minimize ssh and rdp windows and don't use it for ten minutes. But I still use VPN for downloading some files.
Then I open ssh window - the session is inactive, open rdp window - I see a black screen (for 10-15 seconds, and then it shows RDP)
There are no timeouts on ssh or rdp hosts configured, via GRE tunnel it works perfectly without any hangs.
What can I do to get rid of this problem?
Thanks in advance.

Answer 1

Dear Fedor,
You could try adding the following commands to your configuration (on both ASAs) in order to increase the timeout values of the specific TCP sessions:
access-l rdp_ssh permit tcp 1.1.1.0 255.255.255.0 2.2.2.0 255.255.255.0 eq 22
access-l rdp_ssh permit tcp 1.1.1.0 255.255.255.0 2.2.2.0 255.255.255.0 eq 3389
class-map TCP_TIMEOUT
      match access-list rdp_ssh
policy-map global_policy
     class TCP_TIMEOUT
          set connection timeout idle 0:30:00
          set connection timeout half 0:30:00
* Please make sure you define the specific RDP and SSH ports in the ACL and avoid the use of "permit ip any any".
Let me know.
Portu.
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