SSH to secure access to the router, on which release ?

[Fida jlassi]

Hi all,

The telnet access to the router for the administration is not secure, it's recommended to use the SSh instead of the Telnet, my question is: did all IOS image allow the SSH access?

I have the following version:

15.1(1)T4

12.4(3i)

12.4(3g)

Should I upgrade to configure the SSH?

[Mark Malone]

Hi

for ssh you need to have an image that supports encryption which would usually have a K9 in it like below

You could check either by going to conf t mode and try to enable it --ip ssh version 2 for example or by trying to generate keys crypo key generate

Only use ssh version 2 don't use 1 or 1.99 that's backward compatible make sure to set it for 2 to be fully secure, never use telnet when possible passwords can be captured through sniffing the wire

[Fida jlassi]

And what does it mean the K9 ?

[Mark Malone]

K9 Product bundels have strong AES/3DES encryption.