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 at 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 at gmail.com renato.diogo at yahoo.com.br 2009/3/31 Les Mikesell <lesmikesell at gmail.com>: > 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 at gmail.com > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >