Delays in Telnet to Linux Box

I have a Linux box sitting on our internal network ...

Suppose the IP of the box is 10.10.0.100

When I try to telnet to that box from a computer on that same 10.10.0.*
network, then there is a 30 second delay before I am prompted to enter my
user name.

However, when I on a different network, i.e. 11.11.0.* then I am prompted
immediately.

Where should I begin to investigate ?

Any help / suggestions would be greatly appreciated.

Cheers

--
==============================

"D" <(E-Mail Removed)> wrote in message
news:cwkvd.479623$Pl.456384@pd7tw1no...
>I have a Linux box sitting on our internal network ...
>
> Suppose the IP of the box is 10.10.0.100
>
> When I try to telnet to that box from a computer on that same 10.10.0.*
> network, then there is a 30 second delay before I am prompted to enter my
> user name.
>
> However, when I on a different network, i.e. 11.11.0.* then I am prompted
> immediately.
>
> Where should I begin to investigate ?
>
> Any help / suggestions would be greatly appreciated.
>
> Cheers

I've seen the same thing for all access (www, smtp, etc).

I'd love to know how to speed it up.

Randy

On 2004-12-13, D <(E-Mail Removed)> wrote:
> I have a Linux box sitting on our internal network ...
> When I try to telnet to that box from a computer on that same 10.10.0.*
> network, then there is a 30 second delay before I am prompted to enter my
> user name.

It sound like a problem in reversing the IP of the client, maybe
you should check if the server is trying to do so and configure it
accordly.

Davide

--
If men are from Mars and women are from venus, there is going to be a big
ass fight over the thermostat.
--Jim Rosenberg on alt.sysadmin.recovery

Davide Bianchi wrote:

> On 2004-12-13, D <(E-Mail Removed)> wrote:
>> I have a Linux box sitting on our internal network ...
>> When I try to telnet to that box from a computer on that same 10.10.0.*
>> network, then there is a 30 second delay before I am prompted to enter my
>> user name.
>
> It sound like a problem in reversing the IP of the client, maybe
> you should check if the server is trying to do so and configure it
> accordly.
>
> Davide
>


he's write.. i first saw that problem on a bsd box i used to run.. if you
are doing reverse dns lookup on ips, it will slow everything down..
especially if no or non valid dns servers are listed in resolv.conf

A 30 second delay sound to me like a DNS lookup timeout.
After the first DNS server times out, the lookup fails over to the 2nd DNS
server which succeeds.

================================================== =================
"Randy McLaughlin" <(E-Mail Removed)> wrote in message
news:0Vkvd.76387$(E-Mail Removed). ..
> "D" <(E-Mail Removed)> wrote in message
> news:cwkvd.479623$Pl.456384@pd7tw1no...
> >I have a Linux box sitting on our internal network ...
> >
> > Suppose the IP of the box is 10.10.0.100
> >
> > When I try to telnet to that box from a computer on that same 10.10.0.*
> > network, then there is a 30 second delay before I am prompted to enter
my
> > user name.
> >
> > However, when I on a different network, i.e. 11.11.0.* then I am
prompted
> > immediately.
> >
> > Where should I begin to investigate ?
> >
> > Any help / suggestions would be greatly appreciated.
> >
> > Cheers
>
> I've seen the same thing for all access (www, smtp, etc).
>
> I'd love to know how to speed it up.
>
> Randy
>
>