[Bug 281882] Re: ssh hangs in initial handshaking when using IPv6

[DaveAbrahams]

I can confirm this problem on Intrepid with kernel 2.6.27-11-server

This really bites when you try to SSH in from a Mac to an avahi name,
which seems to go with ipv6 by default.

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ssh hangs in initial handshaking when using IPv6
https://bugs.launchpad.net/bugs/281882
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[Bug 84899] Re: SSH with GSSAPIAuthentication option on SSH servers are very slow

[DaveAbrahams]

I've reproduced the problem on: Intrepid Minimal CD Install + ssh

There's no apparent avahi installed or activated

In that configuration, -o GSSAPIAuthentication=no on the client
command line has no effect, nor does setting it in the server's
ssh_config file (though why that would change anything, I have no idea).
The only way to suppress the delay seems to be to put

UseDNS no

in the server's /etc/ssh/sshd_config

-- 
SSH with GSSAPIAuthentication option on SSH servers are very slow
https://bugs.launchpad.net/bugs/84899
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