Red Hat Bugzilla – Bug 56681
openssh hangs over wireless network
Last modified: 2007-04-18 12:38:25 EDT
I just installed a wireless network, and have been experiencing weird
problems with SSH that I presume indicate a bug in SSH itself.
Basically, SSH connections freeze up, in a not particularly predictable
way. Sometimes they freeze up almost immediately, although it pretty much
always lets me log in and hit returna few times. Starting something big,
like an X client, often causes it to freeze up within a few seconds. But
sometimes it can go for 20 minutes without freezing.
The freezing usually isn't permanent. The connection often starts working
again, at least temporarily, in 5-30 minutes.
With an ethernet connection and the same machines on the same network, this
problem does not reappear. Wireless networking otherwise works fine,
including long downloads using FTP or red-carpet, and web browsing and all
The wireless card I'm using is a Netgear MA401, and the access point is a
Linksys BEFW11S4. I'm running openssh 2.9p2-9
I suspect that there's a network-level problem here, because a TCP connection is
a TCP connection, whether it goes through the air or on a wire. If you run
"/sbin/ifconfig eth0" (replacing eth0 with the name of the wireless interface),
are you seeing large amounts of packets being lost?
This is clearly not an openssh bug.