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- login delays on one particular server
- Bob Fnord
April 7, 2010, 10:48 pm
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bunch of different servers, but when I connect to my home
server, running openssh-server 1:5.1p1-6ubuntu2, I notice it
takes a little while longer to log in (using an RSA key).
Using the -v option, I observe noticeable delays between
these two lines
debug1: Checking blacklist file /etc/ssh/blacklist.RSA-4096
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1p1
and between this line
debug1: SSH2_MSG_SERVICE_ACCEPT received
and the ssh banner.
Have I configured something funny on my server to cause
Re: login delays on one particular server
Might this be a lack of reverse DNS? If you can set the SSH server in
question to start sshd with the option '-u0', this prevents the
attempt to reverse DNS the incoming IP address. It's been an issue for
a *LONG* time, and changing the sshd arguments is the only way to turn
it off completely (unless code has changed noticeably lately).
The reverse DNS is used for logging even if it's not used for blocking
anything, and can take some time to timie out.
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