"Corrupted MAC on input" disconnects

Installation, configuration and troubleshooting of the Cisco VPN Client on Linux systems

"Corrupted MAC on input" disconnects

Postby suseuser04 » Mon Aug 01, 2011 11:42 pm


I would like to make vpnclient work on openSUSE 11.4 with kernel
kernel-desktop- i586.
I used vpnclient-linux-x86_64- version of vpnclient and
applied the patch called vpnclient.patch-2.6.38 mentioned in this topic:

vpnclient built and installed without any problem.
I can run vpnclient and it makes the vpn tunnel.

However if I use ssh or sftp with bigger traffic (eg. transfer larger file)
the ssh/sftp connection is terminated with this message:

Corrupted MAC on input.
Disconnecting: Packet corrupt

ssh/sftp works if I don't use the vpn tunnel.

Does anyone else have this issue?
How could I fix it?


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