03-24-2014 10:33 PM
I'm struggling to make SSH work on Cisco 3550-PWR router.
It has SSH 1.5/1,9 and complains to generate 768-bit key when I try to activate SSH 2. Even after I generate the keys, it still complains.
I'm able to SSH in using 1.5/1.9 but not 2 yet.
It's been a while since I've done R&S and could use a little help.
Thanks.
Solved! Go to Solution.
03-27-2014 07:15 AM
It is good to know that SSH 1 works. This output
SSH Enabled - version 1.99
usually indicates that the device will accept both SSH 1 and SSH 2. So I am puzzled why SSH 2 is not working. In the original post you tell us "complains to generate 768-bit key when I try to activate SSH 2". I am not sure what that is about. Can you tell us what modulus was used to generate the SSH/RSA keys?
What happens if you generate new SSH/RSA keys and specify modulus 2048?
HTH
Rick
03-24-2014 10:56 PM
Hi ,
share the outputs from the : "debug ip ssh " command
what is the version of code you are running ?
do you see "no exec" configured under his vty lines. if yes remove it and then try again
Thanks-
Afroz
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03-25-2014 06:40 AM
Cisco IOS Software, C3550 Software (C3550-IPBASEK9-M), Version 12.2(44)SE6, RELEASE SOFTWARE (fc1)
I don't see any output from "debug ip ssh."
SSH1/1.5/1.9 works but not 2, can't activate it.
This is "show ip ssh"
SSH Enabled - version 1.99
Authentication timeout: 120 secs; Authentication retries: 3
03-27-2014 07:15 AM
It is good to know that SSH 1 works. This output
SSH Enabled - version 1.99
usually indicates that the device will accept both SSH 1 and SSH 2. So I am puzzled why SSH 2 is not working. In the original post you tell us "complains to generate 768-bit key when I try to activate SSH 2". I am not sure what that is about. Can you tell us what modulus was used to generate the SSH/RSA keys?
What happens if you generate new SSH/RSA keys and specify modulus 2048?
HTH
Rick
03-27-2014 07:21 AM
Not sure what happened but after a restart and some miralce, SSH-2 not works.
I created 768 bit key bunch of times, etc.
Thanks!
03-27-2014 07:54 AM
I am glad to know that SSH 2 has started to work. Sometimes a restart will get things synced up and working that had been somehow out of sync before. Perhaps it was something like that. Thank you for using the rating system to mark this question as answered.
HTH
Rick
03-26-2014 05:59 PM
try to add command under line vty
line vty 0 4
tranport input ssh
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