On Mon, Sep 21, 2009 at 09:44:34AM +0200, Janne Johansson wrote: > Ian Chard wrote: > > I'm troubleshooting a very strange problem, where my ssh connection to a > > few different OpenBSD machines drops suddenly, with the client machine > > receiving a TCP RST from the server. I've taken tcpdump captures on > > both sides (in different sessions, so the tcpdump process doesn't die > > with my shell), and the OpenBSD machine's capture doesn't log the RST it > > apparently sends. > > > There are ISPs that "traffic shape" their links by killing long-lasting > TCP streams by faking the RST in the middle. >
pf(4) does this as well, if the state times out (the default timeout for established sessions is around a day). Many other systems behave similar (sometimes with much shorter timeouts). Enabling ssh keepalive helps. -- :wq Claudio
