SSH and Embedded Devices Redux

While tinkering with Slackware 15.0, I discovered I could not SSH into the house network router. The failure message:

no matching host key type found. Their offer: ssh-rsa

No such problem with Slackware 14.2.

The failure is caused by the difference between OpenSSH 7.4p1 in Slackware 14.2 and OpenSSH 8.8p1 in Slackware 15.0.

The ssh-rsa signature was deprecated in SSH 8.7. The router has not been updated to accommodate the change.

In the user ~/.ssh/config file I added the following directive for the router configuration:

HostkeyAlgorithms +ssh-rsa

Posted: December 04, 2022 Category: Usability Tagged: General