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тАО11-13-2008 10:50 AM
тАО11-13-2008 10:50 AM
When I try to ssh from my server to another server it takes over a minute before getting a prompt on the other server. Telnet works okay.
I've checked /etc/resolv.conf, /etc/hosts, /etc/inetd.conf and they look okay, compared to a server that works. I checked the syslog.log file, no errors.
Anyone have any ideas where to look?
Thanks
nj
Solved! Go to Solution.
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тАО11-13-2008 11:26 AM
тАО11-13-2008 11:26 AM
Re: ssh slow
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тАО11-13-2008 12:08 PM
тАО11-13-2008 12:08 PM
Re: ssh slow
Try by numeric ip address. If its still slow, look at lanadmin, network and switch configuration.
If numeric if fast and name is not, then you may have slow DNS servers, or DNS servers from Microsoft that need a patch or two or three.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО11-13-2008 12:56 PM
тАО11-13-2008 12:56 PM
Re: ssh slow
Steven - Thanks, you got me going in a positive direction. When I use the IP address it does go faster, almost immediate. But, I'm pointing to the same DNS server as the other servers that work ok. But it dose seem to be related to reverse lookup. I have an entry in my hosts file and nsswitch.conf looks at the hosts file first, then DNS.
And I'm getting ready to leave for the night, so thanks for the responses and I'll take this up in the AM. Points will be coming.
Thanks,
nj
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тАО11-13-2008 01:13 PM
тАО11-13-2008 01:13 PM
Re: ssh slow
in otherwords: SvrA -> ssh -> SvrB, given you're description, trying to lookup SvrA on SvrB has problems....
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тАО11-16-2008 03:50 PM
тАО11-16-2008 03:50 PM
Solution...indicating that DNS isn't working correctly on this server.
> But, I'm pointing to the same DNS server as the other servers that work ok.
Use nsquery rather than nslookup. You may be pointing to the same DNS servers but the first couple of servers may not be reachable or the DNS server refuses to talk to this system. For exapmple:
nsquery hosts some_host
> But it dose seem to be related to reverse lookup. I have an entry in my hosts file and nsswitch.conf looks at the hosts file first, then DNS.
...reverse lookup -- very common mistake in Microsoft DNS servers. You can eliminate the delay using your current nsswitch.conf file by adding each hostname (and aliases such as FQDN's) to your /etc/hosts file.
nsquery hosts 12.34.56.78
to show reverese lookup results.
Bill Hassell, sysadmin
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тАО12-05-2008 08:24 AM
тАО12-05-2008 08:24 AM
Re: ssh slow
Thanks again,
U