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Enabling SSH on a Router

mike_jones
Level 1
Level 1

I'd like to start using SSH as opposed to telnet for router management. Can someone outline the steps I need to take in order to enable SSH?

Thanks

3 Replies 3

Richard Burts
Hall of Fame
Hall of Fame

The steps would be:

- verify that the image that you are running on your router(s) supports SSH. If they do not, upgrade the image on your router(s). (I believe that SSH is supported only on versions and feature sets that support DES/3DES)

- generate RSA keys. (to do this requires that the host name be set and that the domain name be set).

- verify that the vty port configuration includes transport ssh (it should by default, but some places put restrictive configs for transport on the vty).

- enable SSH on the router.

- use SSH to access the router.

HTH

Rick

HTH

Rick

Here is some documentation on the same steps suggested by Rick.

http://www.cisco.com/en/US/tech/tk583/tk617/technologies_tech_note09186a00800949e2.shtml

Sankar Nair
UC Solutions Architect
Pacific Northwest | CDW
CCIE Collaboration #17135 Emeritus

autobot130
Level 1
Level 1

Step 1) Make sure you have a 3DES/SSH capable IOS.

Step 2) Configure hostname and domain name.

Step 3) config(enable): crypto key gen rsa (use the defaults)

Step 4) line vty 0 4 --> Transport input ssh (to allow ssh only, add telnet in the back as fallback).

All done.