Bug 56681

Summary: openssh hangs over wireless network
Product: [Retired] Red Hat Linux Reporter: Yaron Minsky <yminsky>
Component: opensshAssignee: Tomas Mraz <tmraz>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: 7.2   
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2005-02-03 11:10:41 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Yaron Minsky 2001-11-24 14:39:50 UTC 
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 rest.

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
Comment 1 Nalin Dahyabhai 2002-03-07 21:08:08 UTC 
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?
Comment 2 Tomas Mraz 2005-02-03 11:10:41 UTC 
This is clearly not an openssh bug.