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Re: ssh login lag



You are blocking any incoming DNS packets by blocking udp. I believe
sshd tries to lookup the hostname of the ipaddress, it times out in few
seconds, this causes the lag. This can also happen if
your /etc/resolv.conf is pointing to unresponsive servers.

Following are the following fixes.

-> make "UseDNS no" in sshd_config

-> allow DNS from iptables AND verify /etc/resolv.conf

HTH
Arun

On Thu, 2006-05-25 at 00:37 -0700, atomi wrote:
> I've got a pretty bare bones system. Headless Fedora Core 5
> My problem occurs when I login via putty through SSH,
> after I've entered my password there is an ugly lag...
> 
> here here is my IPTABLES:
> 
> *filter 
> :OUTPUT ACCEPT [0:0]
> :FORWARD ACCEPT [0:0]
> :FIREWALL-INPUT - [0:0]
> :INPUT ACCEPT [0:0]
> -A INPUT -j FIREWALL-INPUT
> 
> -A FIREWALL-INPUT -p tcp --dport ssh -j ACCEPT
> -A FIREWALL-INPUT -p tcp -m tcp -j REJECT 
> -A FIREWALL-INPUT -p udp -m udp -j REJECT
> COMMIT
> 
> so, alright, pretty simple huh; anyone know why the lag monster
> appears?
> ANY insight i think would help.
> Thanks guys,
> atomi.
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