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knevyn
New Contributor III

vpn tunnel disable file transfers

We are having an issue with client VPN disconnecting when we try to download file from the office. We're using Shrew for the client and a 3120. Transferring files up to the office work.

We've tried 11.4.1, 11.5.0, and 11.5.1.

Any ideas on the problem or how to troubleshoot?

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2 Replies
Anonymous
Not applicable

Re: vpn tunnel disable file transfers

Kevin,

Thanks for posting your question on the forum!

I'm not aware of any issues as that. The first thing I would recommend doing is turning on "debug cry ike" and log the output as a file transfer is taking place. Also, take a look at the Shrew log and see what it is seeing.

Is it happening with all the file transfers or just a certain file? Is it happening with a file transfer in one direction or in both directions?

Please do not hesitate to let us know if you have any questions.

Thanks,

Noor

mick
Contributor
Contributor

Re: vpn tunnel disable file transfers

If this is only happening with large files, but small files download successfully, it could be a packet fragmentation problem.  In this case packet capture with wireshark/tcpdump would show 'segment lost' errors.  You can try setting the MTU of the NIC at a smaller size on the client machine, e.g. 1400, 1380, 1340, etc. to see if at some point the download succeeds.

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Regards,

Mick