Quick question

Bennett, Daniel daniel.bennett@jnli.com
Wed, 29 Nov 2000 13:18:02 -0500


This message is in MIME format. Since your mail reader does not understand
this format, some or all of this message may not be legible.

------_=_NextPart_001_01C05A30.BC22751E
Content-Type: text/plain;
	charset="iso-8859-1"

>
> 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.
	

------_=_NextPart_001_01C05A30.BC22751E
Content-Type: text/html;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">



RE: Quick question



>
> 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.
       =20

------_=_NextPart_001_01C05A30.BC22751E--