Change Telnet Port on Catalyst 4506

Answered Question
Sep 11th, 2008

I try to change the standard telnet port 23 to other one, for example to the 9023.

As a work aound, I have use an ACL to deny the port 23 on WAN Interface and a port over rotary command on line vt 0- 15.

Is it posible to change the telnet port 23 nr. in a easy and directly way.

I have this problem too.
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Correct Answer by t814687 about 8 years 4 months ago

Hello Sueleyman, It looks like there is no way to change it to arbitary port. I assume you doing this for security reasons? Much better and secure to use ssh to manage the switch and disable 23 telnet transport on the vty. However your IOS image must support that.

HTH

serg

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Correct Answer
t814687 Thu, 09/11/2008 - 09:54

Hello Sueleyman, It looks like there is no way to change it to arbitary port. I assume you doing this for security reasons? Much better and secure to use ssh to manage the switch and disable 23 telnet transport on the vty. However your IOS image must support that.

HTH

serg

Ayvalikslo2 Thu, 09/11/2008 - 22:24

Thanks for your answer,

Unfortunately, all our switches do not support SSH.

Best regards

Sueleyman

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