VPN client. RDP problems (Terminal Server) after migrating from PIX to ASA

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Jun 28th, 2007
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I have migrated from PIX515E with VPN client configured and working fine to a pair of ASA 5520 with active-standby scheme. All is working fine but I have a problem with RDP and file sharing.

When I connect to the VPN with the client I can ping the server, and I can access to shared folders, but almost everytime I get disconnected from the server with "Encryption Error" at Remote Desktop client. VPN client keeps connected and I can ping the server.

Whe I am connected to the VPN I am able to begin copying files but after some seconds or minutes the file transmision gets disconnected. VPN clients keeps connected and I can ping the server.

I have tried to set MTU to 1300 at client and I have configured "sysopt connection tcpmss 1300" at ASA with no luck.

Any idea ??

Thanks a lot.

Best regards,

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r.carreras Sun, 07/01/2007 - 11:38
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I have found a workaround for this problem. I have disabled "Instant Messaging" inspection and now it seems that it's working fine.

Is this a "bug" ???

Thank you.

pornthip_k Sun, 07/15/2007 - 05:16
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I got the problem likt you.

How to result this issue?

Thank you.

r.carreras Mon, 07/16/2007 - 03:38
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It was needed to disable instant messenger traffic inspection.

I have not been able to turn on messenger traffic inspection without VPN problems.


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