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I use ssh tunnel as web proxy, it works well, but it often stops responding after I browse a while, which can be several minutes or one hour, putty client doesn't respond either. I have to start a new putty client to continue using it.

If I don't use the tunnel for browsing, my putty client can usually keep alive for several hours even when I don't use the computer, it doesn't seem to be caused by the connection between my server (freebsd) and my computer. When browser and putty stop responding, if I close the browser, putty may recover after a while.

What's the possible reason for that? Thanks!

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closed as off topic by womble, Jason Berg, Scott Pack, Holocryptic, Iain♦ Jul 30 '11 at 19:00

Questions on Server Fault are expected to generally relate to servers, networking, or desktop infrastructure, within the scope defined in the faq.

2 Answers

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Next to impossible to guess without logs (client, server, etc.). You may try going through the logs as the starting point.

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You use the words 'keep alive', but are you actually using the KeepAlive option?

If not, turn it on! It'll keep your TCP session from timing out. It's possible there's a stateful firewall in the way.

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Thanks, I will give it a try. – lastsmoke Jul 31 '11 at 1:57
Still the same...Putty client rarely gets disconnected, but with ssh tunnel browsing, the browser and putty will easily hung. – lastsmoke Jul 31 '11 at 2:48
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