I don´t know about use 2 dns, but one dns requistion has timeout to 5000ms.
Do you test this use the dig or nslookup.
====
[renato@thedark ~]$ dig -x 127.0.0.1
; <<>> DiG 9.5.1-P2-RedHat-9.5.1-2.P2.fc10 <<>> -x 127.0.0.1
;; global options: printcmd
....
;; Query time: 14 msec
...
====
The dig showed the time of the query.
[]s
________________________________________________
Renato de Oliveira Diogo
Bacharel em Ciência da Computação
UNESP - Bauru
LPIC1 - Linux Professional Institute Certification - Nível 1
renato.diogo@xxxxxxxxx
renato.diogo@xxxxxxxxxxxx
2009/3/31 Les Mikesell <lesmikesell@xxxxxxxxx>:
> Ryan J M wrote:
>> The waiting time is about 50s on my CentOS box now. "yum remove
>> openssh* "and "yum install openssh*" can't make it right. "mv
>> ~/.ssh{,.bak}" not works either.
>> Here comes my tcpdump log, I am not an expert on SSH, Can anyone here
>> get me out of this?
>>
>
> The answering sshd will do a reverse DNS lookup on the connecting IP
> address. That's about the right time to wait for timeouts from 2 DNS
> servers if they don't respond.
>
> --
> Les Mikesell
> lesmikesell@xxxxxxxxx
>
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>
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