ssh delays
John Chambers
jc at trillian.mit.edu
Fri Sep 21 10:22:00 EDT 2001
Well, digging around in TFM and assorted archives turned up
nothing, so I thought I'd ask the experts:
Starting a few weeks ago, ssh from my home machine started
showing a 1- to 2-minute delay before asking for a
password. It's obvious that "something has changed", but I
haven't found any clues as to what.
It's not a DNS delay, because I can ask nslookup about the
host, and it replies instantly. Ping and traceroute also
respond in under a second.
When I use ssh from outside to get to the machine, it is
also instantaneous. Only outgoing ssh has this delay. There
are no messages of any sort added to any log file that I
can find. I've run ssh with -v, and here's an example of
what it says:
| : ssh -v trill
| SSH Version OpenSSH_2.3.0p1, protocol versions 1.5/2.0.
| Compiled with SSL (0x0090600f).
| debug: Reading configuration data /home/jc/.ssh/config
| debug: Applying options for trill*
| debug: Reading configuration data /usr/local/etc/ssh_config
| debug: Applying options for *
| debug: Seeding random number generator
| debug: ssh_connect: getuid 500 geteuid 0 anon 0
At this point comes the long delay. Then it succeeds with
no apparent problems:
| debug: Connecting to trillian.mit.edu [18.62.1.54] port 22.
| debug: Seeding random number generator
| debug: Allocated local port 723.
| debug: Connection established.
| debug: Remote protocol version 1.5, remote software version 1.2.26
| ...
Any idea where I might find another clue?
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