The ssh server doesn't escape the sequence characters in the banner file.

Solution Verified - Updated -

Issue

  • I specified a banner file in /etc/ssh/sshd_config so that the banner would be displayed when logged in remotely via ssh.

    Banner /etc/issue.net
    
  • I was expecting to see the OS version and other information, but the text in the banner file was displayed as follows.

    $ ssh testuser@testserver
    \S
    Kernel \r on an \m
    Last login: Tue Mar 23 08:59:23 2021 from 10.99.1.143
    

Environment

  • Red Hat Enterprise Linux
  • openssh-server

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