Date: Tue, 27 Feb 2001 14:39:02 -0800 (PST) From: Matt Dillon <dillon@earth.backplane.com> To: David Malone <dwmalone@maths.tcd.ie> Cc: Nate Williams <nate@yogotech.com>, Rich Morin <rdm@cfcl.com>, freebsd-stable@FreeBSD.ORG Subject: Re: Curious delay in telnet Message-ID: <200102272239.f1RMd2V66683@earth.backplane.com> References: <p05001902b6c0f012220b@[192.168.168.205]> <15003.57375.775222.91091@nomad.yogotech.com> <20010227222931.A55112@lanczos.maths.tcd.ie>
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:I don't think that will help 'cos the delay looks like it is with
:the telnetd at the far end trying to look up the name, not the
:local telnet. Unfortunately telnetd doesn't seem to have an option
:corrisponding to -N.
:
: David.
It's the telnet on the end trying to do a reverse-IP lookup of your IP
address. Generally a delay like this means that you do not have your
DNS setup properly to allow the remote end to do a lookup of your IP.
The reverse setup is something that you have to work out with whomever
owns your IP address space (typically your ISP or colo-facility). If
you own the IP space directly, then there's probably a broken delegation
somewhere.
Alternatively, your reverse IP may work fine from external hosts but the
DNS resolver on the particular destination you are telneting to is broken.
-Matt
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