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How to check application / server listening to specific port

Usually, we use tenet <IP> <port> from traditional switch or router to check server listening to the port.

 

like ping ==> iping and traceroute ==> itraceroute used in ACI

 

Do we have any mechanism to check similar thing.

 

Thanks in advance.

4 REPLIES 4
Cisco Employee

Re: How to check application / server listening to specific port

Shailesh,

    A few questions:

1. What src/dst IPs are you trying to test port connectivity from/to?

    a. IPs local to switch nodes/APIC nodes?

    b. Endpoints?

 

If you are trying to see what is opened for endpoints to communicate with, you can check the following from an apic:

> show contract *contract_name*

> show access-list *access-group-name*

 

If you are looking to catch denies or permits given active traffic flows, you can refer to the following document:

APIC Security Guide

 

-Gabriel

Re: How to check application / server listening to specific port

Thanks Gabriel for responding.

 

my query is how we can ensure endpoint listening on port 80 or it's a valid http server. In the traditional switches we used to use

 

telnet <IP of server> 80 and it used to respond.

 

Looking for similar arrangement in ACI.

 

Hope I'm able to spell my query correctly.

 

Thanks in advance

 

Highlighted
Cisco Employee

Re: How to check application / server listening to specific port

Hi,

You can use nmap from any Linux based workstation. Don't do this from a switch or ACI.

 

Nicolas

Re: How to check application / server listening to specific port

Thanks, this we need to do when we don't have access to end servers / and no reachability to system administrator.

 

So wanted to check similar arrangement / method in ACI to check this.

 

 

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