Martijn Koster wrote:
Ah, I thought it might be something to do with MTU values, but felt like I was just guessing. Thanks.
At present my MTU is set to 1500 (according to ifconfig). If I test the route to my server: ping -s 1472 -M do ip.of.my.server I get a reliable response. (-s 1473 fails, which I would expect with the TCP/IP overhead of 28bytes)
If I follow the advice of the linked FAQ I will be reducing my MTU to 576. I don't see that having a noticeably negative effect on SSH but will it negatively affect other traffic?
[NB: Test just performed from office away from 3G connection I was using over the weekend; I would not be surprised if reducing the MTU over the weekend would have been necessary. Connections from the office are far more reliable but do drop sometimes.]