telnet is too slow in Scientific Linux

[Edison, Arul (GE Healthcare)]

Hi All,
In my system, I want to provide telnet feature and hence I installed 
the telnet rpms . however I found that , when connected from another system 
with telnet command, it takes 30 mins to show the telnet login prompt.
Is there any configuration needed to be performed to make the telnet 
fast?
Many Thanks,
Arul

telnet is too slow in Scientific Linux

[Edison, Arul (GE Healthcare)]

Below is the list of packages I have installed for telnet service
1)telnet-0.17-47.el6_3.1.x86_64
2)telnet-server-0.17-47.el6_3.1.x86_64

when I checked for the status of telnet service, it is as below
/sbin/chkconfig  | grep telnet

Still when a telnet session is opened to this PC, it takes exactly 30 seconds 
to show the login prompt
-Original Message-
From: owner-scientific-linux-us...@listserv.fnal.gov 
[mailto:owner-scientific-linux-us...@listserv.fnal.gov] On Behalf Of Edison, 
Arul (GE Healthcare)
Sent: Tuesday, May 27, 2014 3:36 PM
To: Scientific Linux Users
Subject: telnet is too slow in Scientific Linux

Hi All,
In my system, I want to provide telnet feature and hence I installed 
the telnet rpms . however I found that , when connected from another system 
with telnet command, it takes 30 mins to show the telnet login prompt.
Is there any configuration needed to be performed to make the telnet 
fast?
Many Thanks,
Arul

Re: telnet is too slow in Scientific Linux

[John Lauro]

The remote system is probably doing a reverse DNS lookup or some other lookup 
of the incoming connection.  Make sure DNS is configured on the server side, 
and that there is a reverse address for your client.

Another possibility is the remote server is trying to do a ident on the 
incoming connection.  If it's not running it should be fine, but if it's 
firewalled to drop instead of reject it could require a timeout.


- Original Message -
> From: "Arul Edison (GE Healthcare)" 
> To: "Scientific Linux Users" 
> Sent: Tuesday, May 27, 2014 6:57:59 AM
> Subject: telnet is too slow in Scientific Linux
> 
> Below is the list of packages I have installed for telnet service
> 1)telnet-0.17-47.el6_3.1.x86_64
> 2)telnet-server-0.17-47.el6_3.1.x86_64
> 
> when I checked for the status of telnet service, it is as below
> /sbin/chkconfig  | grep telnet
> 
> Still when a telnet session is opened to this PC, it takes exactly 30
> seconds to show the login prompt
> -Original Message-
> From: owner-scientific-linux-us...@listserv.fnal.gov
> [mailto:owner-scientific-linux-us...@listserv.fnal.gov] On Behalf Of
> Edison, Arul (GE Healthcare)
> Sent: Tuesday, May 27, 2014 3:36 PM
> To: Scientific Linux Users
> Subject: telnet is too slow in Scientific Linux
> 
> Hi All,
>   In my system, I want to provide telnet feature and hence I installed
>   the telnet rpms . however I found that , when connected from
>   another system with telnet command, it takes 30 mins to show the
>   telnet login prompt.
>   Is there any configuration needed to be performed to make the telnet
>   fast?
> Many Thanks,
> Arul
> 

Re: telnet is too slow in Scientific Linux

[Chris Schanzle]

On 5/27/14, 6:06 AM, Edison, Arul (GE Healthcare) wrote:

Hi All,
In my system, I want to provide telnet feature and hence I installed 
the telnet rpms . however I found that , when connected from another system 
with telnet command, it takes 30 mins to show the telnet login prompt.
Is there any configuration needed to be performed to make the telnet 
fast?
Many Thanks,
Arul


In addition to other suggestions, check tcp_wrappers /etc/hosts.{allow,deny}
rpm -qlia tcp_wrappers\*
man hosts.allow