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Server: RH (though I am not sure which version) Client: Linux Mint 15

I'm trying to ssh from a machine behind a router to a server on the network to which the router is connected. I'm using public key authentication. I get this error:

debug1: Next authentication method: publickey debug1: Offering DSA public key: /home/XXXXX/.ssh/id_dsa Connection closed by XXX.XXX.XXX.XXX

If I connect the client to the same network the router and server are attached, then everything seems to work fine.

Does SSHD contact the client and could the router be blocking this transaction? The logs are not providing a lot of information, and I do not have admin permission for the server, so I cannot look at all the configuration the way it is set up.

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