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I had a problem with ssh 5.6 or 5.8 connecting across a VPN. I solved it by going back to ssh 5.5. But I don't understand the reason why 5.8 or 5.6 do not work. Here's the story: Actors: - laptop with cygwin 1.7 and openssh 5.8p1 on windows XP - desktop with redhat EL linux 5 with openssh 4.3p2 When the machines are on the LAN, I can ssh from one to the other. Not so when the laptop is connecting to the company network via a VPN. - I can connect from the desktop to the laptop - I cannot connect from the laptop to the desktop Here is the trace when connecting from laptop to dekstop: OpenSSH_5.8p1, OpenSSL 0.9.8r 8 Feb 2011 debug1: Reading configuration data /home/.ssh/config debug1: Reading configuration data /etc/ssh_config debug1: Connecting to a.b.c.d [a.b.c.d] port 22. debug1: Connection established. debug1: identity file /home/.ssh/id_rsa type 1 debug1: identity file /home/.ssh/id_rsa-cert type -1 debug1: identity file /home/.ssh/id_dsa type 2 debug1: identity file /home/.ssh/id_dsa-cert type -1 debug1: identity file /home/.ssh/id_ecdsa type -1 debug1: identity file /home/.ssh/id_ecdsa-cert type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_4.3 debug1: match: OpenSSH_4.3 pat OpenSSH_4* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.8 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-ctr hmac-md5 none debug1: kex: client->server aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP On the desktop (/var/log/secure), seconds after trying to establish the connection from the laptop I see: "fatal: Read from socket fails. Connection reset by peer" Luckily I found the 5.5 tar.bz2 file in my dist directories. Once I installed it using setup, I was able to connect using ssh (and unison) I did not see anything in the /usr/share/doc/Cygwin or /usr/share/doc/openssh/ that would point to a difference between 5.5 and 5.6, 5.8. Any thoughts on what could be causing the problem? Thanks, Mirko
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