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New Member

How to disable Telnet on a switch

I would like to disable Telnet on a Cisco 3560G switch. I have seen all over the web that the way to it is by:

line vty 0 4

transport input ssh

However, this doesn't work for me. SSH is not a valid transport on my switch. The only allowable transports are "All", "None" or "telnet". If I try SSH it gives the invalid input error.

I'm assuming this is because SSH is defaulted on Catalyst switches, but how can I remove Telnet?

4 REPLIES
Hall of Fame Super Blue

Re: How to disable Telnet on a switch

Well you can use "transport input none" but be aware that you then can't remotely access the switch.

The reason SSH is not an option is probably because you need an IOS version that supports SSH for your switch.

Jon

New Member

Re: How to disable Telnet on a switch

SSH is enabled on the switch. That's what I use all of the time. I'm afraid that if I use "none" I won't be able to access it with SSH then. Is that correct?

Hall of Fame Super Blue

Re: How to disable Telnet on a switch

Steve

Oops, sorry i misunderstood your original post. Yes, definitely do not use "transport input none" as this will indeed lock you out of the switch.

Which IOS version are you running on the switch ?

Jon

New Member

Re: How to disable Telnet on a switch

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