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tmate-io / tmate-ssh-server

tmate SSH server
https://tmate.io
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Error doing the key exchange #14

Closed jajm closed 8 years ago

jajm commented 9 years ago

Hi,

tmate works fine when I use master.tmate.io, but when I try to use it with my own server, tmate-slave answers this:

[.........................] [tmate] FATAL Error doing the key exchange

and tmate:

Error connecting: kex error : no match for method server host key algo: server [ssh-dss,ssh-rsa], client [ecdsa-sha2-nistp256]

When I move my ~/.ssh/known_hosts away, it works.

Any idea how I could fix this ?

ytti commented 9 years ago

Not sure if I'm seeing same or not. I'm running latest version from github, and tmate-slave works for me. Occasionally it crashes on 'error doing the key exchange', I presume simply because these are some port-sniffing attempts with crappy payload, case which probably is mishandled.

2015-09-03 00:05:09 [main] [tmate] Child spawned pid=6347, ip=116.54.201.188 2015-09-03 00:05:09 [.........................] [tmate] FATAL Error doing the key exchange 2015-09-03 00:05:09 [main] [tmate] Child 6347 exited (255)

Happens relatively frequently:root@tmate:~# grep FATAL /var/log/tmate-slave.log|ruby -nae 'puts $F[0]'|uniq -c 50 2015-08-18 107 2015-08-19 54 2015-08-20 58 2015-08-21 12 2015-08-27 49 2015-08-28 78 2015-08-29 162 2015-08-30 43 2015-08-31 54 2015-09-01 53 2015-09-02 6 2015-09-03 root@tmate:~#

Doesn't really bother me much systemd restarts it, and it always works when I need to use it.