Quick question

[Adam McDougall]

Sounds to me like a general reverse lookup DNS problem.  Make sure every
machine involved has a working dns server listed in /etc/resolv.conf or
/etc/hosts which list a hostname and ip for every computer involved.  When
you connect to most unix services, they try to reverse lookup your
hostname and ip and will stall for a minute or two trying to do so. 

On Wed, 29 Nov 2000, Bennett, Daniel wrote:

> >
> > Any ideas from anyone on why my linux machine takes forever to
> > accept Telnet and FTP connections. Once it actually accepts the
> > connection, it flies, and apache never seems to stall on initial
> > connection. It just stalls. I'm running Redhat 7 with 128 MB of
> > RAM. I was thinking it is a RAM problem (not enough), but the box
> > isn't doing that much most of the day. Would apmd do something like
> > this without me telling it to? Any ideas would be helpful.
> >
> 
> 	Most likely it's the TCP wrappers waiting for a DNS lookup.  If you
> have entries in your /etc/hosts.allow or /etc/hosts.deny that explicitly
> specify hosts, or an entry turning on PARANOID when you telnet into the box
> it does a reverse (then forward if PARANOID) DNS lookup to make sure you're
> allowed to have access.. Also, login does a reverse lookup to put a hostname
> in /var/log/utmp.  Check your /etc/resolve.conf.
> 	Or it could be identd, but I've never had a problem with that
> before.
> 	
>