I've seen this. After I rebooted with a new kernel in Linux (forgetting to re-enable my network card, doh!) I tried to ssh out, and it locked my terminal! It wouldn't even accept a ^C, just hung "forever". This is in debian, which uses openssh. I've also experienced the same thing here, again with openssh (but a working network card), when it just hangs while trying to connect to an unreachable host. No new information here, just wanted to back up Brian in that it is not an OS specific thing. And ping (the only other program I tried both times) does *not* hang. On Thu, Jan 04, 2001 at 05:55:14AM +0200, Sami Lehtinen wrote: > Brian Dantes, on December 29. 2000, wrote: > : I've seen various posts here about this problem - but no answers. > : I'm running SSH2 2.4.0 under Solaris 2.8 in a cron job script, and the > : script hangs indefinitely when the server it's trying to reach is > : completely unavailable for various network reasons. > : > : I was really hoping for a timeout parameter in the client that would > : force it to abandon the connection attempt after a specified amount > : of time. I'm frankly amazed that no provision was made for this > : feature. > > Huh? ssh uses standard socket calls to connect to the remote, and the > local machine's tcp stack should handle any network related > timeouts. The application re-tries the connection for five times > before giving up, but it is up to the system call as to how long one > attempt takes. > > It definitely shouldn't hang indefinitely. Have you tried other > applications (like telnet, finger) in the same conditions? If they act > the same, I'd say your system either has a bug in the TCP code or has > been misconfigured somehow. On the other hand, if they timeout > correctly, then ssh has set some socket options etc. that the Solaris > TCP stack doesn't like. Could you send a verbose (-d 5 would be nice) > of a connection attempt which just hangs in these conditions? > > -- > [[EMAIL PROTECTED] -- Sami J. Lehtinen -- [EMAIL PROTECTED]] > [work:+358 9 85657425][gsm:+358 50 5170 258][http://www.iki.fi/~sjl] > [SSH Communications Security Corp http://www.ssh.com/]
