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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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I configured an ssh connection on an ISR 4451 router, which always worked perfectly. For several weeks, every time I want to connect with Putty via SSH, I get an "access denied". I also cant connect … from any other device via SSH to the router. I have created a new user in ISR and created a new SSH key, but even with this, no connection is possible. SSH connection to other router and switches …
asked Jul 31 '18 by Sven