Questions tagged [ssh]

Secure Shell or SSH is a network protocol that allows secure communication. For most it is a preferred alternative to Telnet when available. SSH can use automatically or manually generated keys for authentication.

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1answer
7k views

Authenticate ssh key via Cisco ACS (TACACS+)

I can set a router to authenticate via a ssh public-key with: ip ssh pubkey-chain username admin key-string <ssh-pub-key> exit exit Is it possible to do something similar with Cisco ...
3
votes
2answers
14k views

Telnet or SSH into a Cisco router

I would like to log into a Cisco router that is in a LAN via telnet or ssh as user <username> with a password <password> only from machines in the LAN 192.168.2.0/24 About the user: I ...
9
votes
3answers
7k views

Cisco can't connect to Juniper device via SSH - Invalid modulus length

I'm trying to connect from a Cisco 886VA to a Juniper EX2200 via SSH. The connection fails with the following messages on the Cisco: *Jan 17 09:51:20.823: SSH2 CLIENT 0: Server has chosen 2056 -bit ...
2
votes
1answer
5k views

Configure SSH cipher on Cisco IOS 12.2(55)SE7

Today a customer contacted me because he has upgraded his MacBook to MacOS X Sierra and since then, when trying to access a switch via SSH he got the message Unable to negotiate with 10.XX.XX.XX ...
0
votes
0answers
40 views

SSH Key Generation

I have an issue where I can't SSH into to switch due to a connection refused fatal error after a switch rebooted. One of the rsa key that is in the switch that I think is used in the switch is : Key ...