Hi I have a linux server that is behind a customer firewall. I can SSH into it but when I try to scp, the connection dies. I believe this is an MTU issue as described here: http://www.snailbook.com/faq/mtu-mismatch.auto.html. How can I set the MTU to a smaller value for just this one customer? I don't have these issues with our other remote servers so I think the problem is at the customer end. I've tried talking to the customers IT guy about this and he didn't seem to know what an MTU was.

My remote server is running Fedora 10

  • Why the downvote? Seems a perfectly legitimate question to me.
    – Massimo
    Oct 7, 2011 at 7:04

2 Answers 2


MTU is based on the interface not ip-adresses. You can setup a second (virtual) interface with a different ip and the mtu you want.

  • 1
    You can't change the mtu of a virtual interface separately from the phyiscal one Jul 9, 2012 at 17:39

Remember that this problem maybe caused by the missed configure MTU on the network equipment between you and your server. What file size you are trying to transfer?

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