[App_rpt-users] Server Login Anomaly

[Joel]

kk6ecm wrote:
>
> Our connectivity outside of the valley was disrupted this morning. I sit in
> one domain, and our club repeater sits in another (first digits of IP
> address different). I could ping the repeater IP address, with a reasonable
> response, but when I attempted to login, it requested my login name, but
> would not return to request the password. I had the same difficulty with two
> Allstar servers in my local domain, with me behind my firewall.
>
> The question is this, what might the ACID build be expecting from the WWW
> that was not available to it during this larger system outage, that would
> not allow it to respond to my login with a return request for the password?

Bob,

This most likely is broken DNS. SSH will log the attempt after you enter the user name along with IP address and reverse DNS (PTR Record) before it will even prompt for the password. It likely is stuck waiting on a DNS response that is not forthcoming. Sometimes the request will time out before the login will - other times not.

Likely your network outage broke your DNS chain. Either you can't reach your recursive DNS server - or - if your using your own local resolver, then it's unable to reach certain points it needs to resolve the reverse PTR record and is stuck awaiting for a response.

You can put "UseDNS no" in your sshd config file to stop it from doing this. That is, once you can get back into that box!

73's
Joel/N7GLV