03-10-2014 05:42 AM
I'm having (repeatable) trouble SSH'ing into a ASR9001 running v5.1.1 using PuTTY (6.3).
Anyone else?
I've been using PuTTY for years without seeing this issue, so I'm thinking 5.1.1 may be acting differently.
I can make the session fail easily by logging in and spacing through a 'show run'.
It always fails with the connection breaking part way through the listing with
"Disconnected: Server protocol violation: unexpected SSH2_MSG_CHANNEL_FAILURE packet"
The same PuTTY client works fine into ASR9001s running 4.2.3/4.3.0.
I can connect without issue using a linux OpenSSH (4.3p2) or Windows TeraTerm (4.8.1) SSH as clients,
it's just this PuTTY-v5.1.1 combination that seems to cause a problem.
PuTTY uses: AES256-CBC and HMAC-SHA1
TeraTerm also uses: AES256-CBC HMAC-SHA1
OpenSSH uses: AES-128 HMAC-MD5
fwiw, my ASR vty and ssh config is the same on 5.1.1 as it is for previous revs.