Unanswered Question
Jul 20th, 2009


I want to check the hits for Port no. 20 on our cisco router, please suggest if there is any command on cisco router(Without affecting any working scenreio).

I have this problem too.
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netbeginner Tue, 07/21/2009 - 06:38


Kindly reply pls.

Have to check the no. of hits for & from port no. 20 on cisco Router/Switches.

netbeginner Wed, 07/22/2009 - 08:32

Dear Freidzs,

No reply from any-one.

Is this so difficult..? Or the question is wrong or there is no solution for the desired result.

ilnaiduccna Fri, 07/24/2009 - 04:45

Hi Sam,

Is there any NAT configured with this port?

Where and how you opened this port on your router



netbeginner Sun, 07/26/2009 - 23:01

HI Naidu,

No there is no NATing configured on router.

We just want to check the port no. 20 hits "To" and "From" the access connectivity IPs on the router.

Lucien Avramov Mon, 07/27/2009 - 21:23

Create an access-list with permitting first port 20 from any to any and then a line allowing all remaining traffic. Apply this ACL on the interfaces.

Then a show access-list will show you hits :

Extended IP access list 101

10 permit tcp any any eq tcp 20 (10 matches)

20 permit ip any any (6 matches)

This should not be production impacting.


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