RE: Open tcp port 2005 on cisco router

From: Deniz CEVIK (deniz@edizayn.com.tr)
Date: Wed Jan 07 2004 - 02:44:55 EST


Yes, I can connect but I couldn't recieve or send any data. I don't know the
model of cisco router but this information also gives us some hints about
the model. It should be cisco 2511. As far as I know, in order to get
terminal screen we should telnet to loopback address that has been defined
for this purpose in the router. What I wonder is can we still get terminal
screen when I connect to port 2005 of router's IP from Internet (out of the
router)?

BR

-----Original Message-----
From: jamesworld@intelligencia.com [mailto:jamesworld@intelligencia.com]
Sent: Tuesday, January 06, 2004 9:56 PM
To: Deniz CEVIK
Cc: pen-test@securityfocus.com
Subject: Re: Open tcp port 2005 on cisco router

On a misconfigured router. yes. Can you connect?
The command that enables this in the line configuration is:
telnet access-server 2005

They need an access-list applied to the router line interface(s) to only
allow that from specific (NEEDED) IP's

Good job! You found what you are supposed to!

-J

At 10:34 01/06/2004, Deniz CEVIK wrote:

> Hi All,
>
> While I am scanning one of our customer's border router, I have
> seen that
>TCP port 2005 is open and reachable from Internet. As far as, I know this
>port is being used for async. connection to other devices in this router.
Is
>that normal to see this port as open from Internet?
>
> BR
>
>
>---------------------------------------------------------------------------
>---------------------------------------------------------------------------
-

---------------------------------------------------------------------------
----------------------------------------------------------------------------



This archive was generated by hypermail 2.1.7 : Sat Apr 12 2008 - 10:53:44 EDT