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Welcome to Cisco Support Community. We would love to have your feedback.

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telnet on port 3000

How to configure telnet on port 3000 ????

New Member

Re: telnet on port 3000

teraterm pro allows you to set the port you want to connect to on the host. Of course the host needs to be listening on port 3000. google search for teraterm software, its free.

New Member

Re: telnet on port 3000

i want to configure my routers vty on port 3000 or 3003,how do i do that,i heard some rotary command but not sure what it does and how it will work???


Re: telnet on port 3000

Under your "line vty" enter "rotary x" where x can be 1-99. Then you can telnet your router at port 3000+x.

For example,

line vty 0 3

password cisco


rotary 4

line vty 4

password backdoor


rotary 5

lets you telnet to TCP port 3004 to access VTY lines 0 through 3 using password "cisco", and TCP port 3005 to access VTY line 4 using password "backdoor". Note that this does not change the Telnet port number for the router: you can still get to it on TCP port 23. (If you need to block Telnet to the router on port 23, use access lists to deny access to that port from anywhere.)

Here's a link to the current documentation on "rotary":

Also, search the forums here for "line vty rotary" or "change telnet port 23" to see how other people are using it.

If you are looking to change the Telnet port number for security reasons, some people use NAT to translate port addresses. (Search forums here for "NAT telnet".) Others disable Telnet altogether and use Secure Shell (ssh). I usually just use ACLs to specify the IP addresses that Telnet sessions are permitted from.

Hope this helps.

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