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New Member

Tcp ports open?

Hello, i've got two Catalyst 3950 connected on stack for the production network and another 3950 catalyst for the test network. There is a crossover cable from the Catalyst of test network to one of the production catalyst in order to give them conectivity.

Now, somebody wants to comunicate from a workstation on the test network to a server on the production network. I can perfectly ping, but this user tells me that he needs to conect using tcp ports 1433 and 5084.

Is there anyway i can test those ports from the switches?

4 REPLIES
Hall of Fame Super Silver

Re: Tcp ports open?

Hello Francisco,

you can test by using

telnet ip-address tcp-port-number

On IOS based switches

to see if you can access the service on the specified port

Hope to help

Giuseppe

New Member

Re: Tcp ports open?

NetworkSwitch1#telnet 192.168.165.XX 5084

Trying 192.168.165.64, 5084 ... Open

NetworkSwitch1#telnet 192.168.165.xx 1433

Trying 192.168.165.64, 1433 ... Open

Hi, i got this answer from the switch, i gues that means the port is listening on the specific machine. That means tcp port is open i guess?

Hall of Fame Super Silver

Re: Tcp ports open?

Hello Francisco,

yes if you see open you have a session with the server

with http server you can type

get

and you should see a reaction of the server

Hope to help

Giuseppe

New Member

Re: Tcp ports open?

Never occured to me that you could run this command from IOS! Thanks Giuslar.

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