Telnet on port 6066

[Delfino Tiongco]

We have several routers that can only be accessed on telnet port 6066 (vice 23).  I have no global exec privilege so I can not provide config.

So my question is: how do you configure the router to accept port 6066 for telnet and deny port 23?

Thanks in advance.

Del

[fb_webuser · Accepted solution]

by changing the system port-map.

like this, since I´m doing telnet, it don´t allow me to change the telnet port, because its using it.

Router(config)#ip port-map telnet port udp 6066

Router(config)#ip port-map telnet port tcp 6066

%Unable to add port-map entry.

This port entry is already contained in the application x11

Router(config)#exit

Router#sh ip port-map | include telnet

Default mapping: telnet tcp port 23 system defined

Default mapping: telnet udp port 6066 user defined

has you can see, in the ip port-map you see the system mapping and can change the system ports to anotther one as user defined.

Default mapping: telnet udp port 6066 user defined

defined

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Posted by WebUser Pedro Seabra Ávila from Cisco Support Community App

[Delfino Tiongco]

Thank you very much!

Del

[cadet alain]

Hi,

Are you sure this is working? As far as I know this feature is not meant for this but for firewall feature to recognize application using non standard ports.I think you can accomplish this using  a static PAT with a loopback like this:

ip nat inside tcp 1.1.1.1 23 interface x/x 6066  where 1.1.1.1 is a loopback IP address

Regards.

Alain

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[fadi sm]

hello

Convert page to telnet cisco level15

thank you

[fadi sm]

hello

how Convert page to telnet cisco level15

[philips_006]

Hi I would like to use the rotary command to telnet into a cisco router. Lets say a port-6187(non standard port). I know that PAT and port-map can be used.

Is there any other way that can be used.

Plz advise,thanks in advance.

Message was edited by: rob roy