Will Angenent
2007-Sep-21 12:35 UTC
openssh-4.7p1 & RemoteForward to openssh-3.6.1p2 Disconnecting: Bad, packet length
Hi, I've just upgraded to openssh-4.7p1 on my gentoo box, and I've noticed a incompatibility with openssh-3.6.1p2 running on a redhat AS3 server. If I ssh from my openssh-4.7_p1 client to the openssh-3.6.1p2 server, and RemoteForward a port, the ssh connection closes if I try to send more than roughly 300K through the tunneled port. The problem isn't present when I use openssh-4.6p1 as a client. A typical error is: Disconnecting: Bad packet length 327708. The number varies with retries. The problem is easily reproducible. Steps to reproduce: - ssh from client ssh openssh-4.7p1 -> server openssh-3.6.1p2 with -R2000:127.0.0.1:2000 - on client: nc -l -p 2000 > /dev/null - on server cat a_big_ish_file |nc 127.0.0.1 2000 => the ssh connection terminates with the error If I'd have a clue where to begin to look for, I'd give you more info, but I'm afraid I'm not too initiated in the openssh world. If I can do anything to help with the diagnosis, please let me know. Regards, Will -- The Wellcome Trust Sanger Institute is operated by Genome Research Limited, a charity registered in England with number 1021457 and a company registered in England with number 2742969, whose registered office is 215 Euston Road, London, NW1 2BE.
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