useDNS yes vs useDNS no

Discussion of Co:Z sftp, a port of OpenSSH sftp for z/OS
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sboshko
Posts: 4
Joined: Mon Dec 22, 2014 8:23 am

useDNS yes vs useDNS no

Post by sboshko »

I have "useDNS yes" coded on our development system and a user is saying that it takes a long time to log in. They have a Windows server that runs an automated script, and often they time out during the log in step. On our production system I have "useDNS no" coded and they don't have a problem. All other parameters between our develpment & production systems are the same. Could this parameter delay log in?
Thank you.
coz
Posts: 391
Joined: Fri Jul 30, 2004 5:29 pm

Re: useDNS yes vs useDNS no

Post by coz »

The delay is probably due to an issue with the reverse dns lookup on your server. It may be related to this: https://bugs.launchpad.net/ubuntu/+sour ... bug/424371

Is there a reason you need to specify UseDNS yes in your sshd_config?

More specifically, this is a Ported Tools OpenSSH question, and you should contact IBM for formal support.
sboshko
Posts: 4
Joined: Mon Dec 22, 2014 8:23 am

Re: useDNS yes vs useDNS no

Post by sboshko »

Thank you for your prompt response. I think that useDNS was coded incorrectly, because all our other LPARs have useDNS no coded.
Regards
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