ssh port forwarding suddenly stops working

This document (7018486) is provided subject to the disclaimer at the end of this document.


SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server 11
SUSE Linux Enterprise Desktop


ssh port forwarding has been working successfully for some time, with a command such as:
Executed on machine, by a process running as User1:
ssh -vvv -N -g -L 4001:
And is running as shown by:
# ps aux | grep ssh | grep User1
User1 9518  0.2  0.2  35044  2892 pts/3    S+   14:25   0:00 ssh -vvv -N -g -L 4001:
This ssh session causes port 4001 to be opened in listen mode, and any new traffic there will be forwarded to port 2022.
This has been working for some time, yet now it fails.  Within the debug logs for the ssh port forwarding session, the following is seen:
debug1: Connection to port 4001 forwarding to port 2022 requested.
channel 1: open failed: administratively prohibited: open failed


User1's password had expired.  Due to the way the processes were started, the port forwarding session was able to start and open port 4001, but no real use of the port forwarding could succeed.
Once the user account was reset and functional, and the ssh port forwarding session was killed and restarted, it worked again.


This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:7018486
  • Creation Date: 12-Jan-2017
  • Modified Date:03-Mar-2020
    • SUSE Linux Enterprise Server

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