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"Enlarge MAX_LISTEN_SOCKS" error

 

Information

 

Summary:

"Enlarge MAX_LISTEN_SOCKS" error while adding VLANs in the LoadMaster

Environment:

Product: LoadMaster

Version: Any

Platform: Any

Application: Any

Question/Problem Description:

Received "Enlarge MAX_LISTEN_SOCKS" error while adding VLANs on the LoadMaster. What does this error indicate and how to overcome this?

Steps to Reproduce:  
Error Message:

sshd: fatal: Too many listen sockets. Enlarge MAX_LISTEN_SOCKS

Defect Number: LM-5920
Enhancement Number: N/A
Cause: Limit on sshd binds (128) for the number of interfaces is exceeded when 'All Networks' is selected for Remote SSH Access
Resolution:

SSHd has a limit of 128 on the number of simultaneous binds it can handle. This is usually hard-coded on the part of the ssh package. This error occurs when this limit is exceeded.

So, the best practice is to limit remote SSH access to only one admin interface after the initial setup of the LoadMaster when 'All Networks' is selected for SSH access. It is advisable to limit remote SSH access to only interface only to avoid such an issue.

This can be done from the LoadMaster Web UI: Certificates and Security > Remote Access > Allow Remote SSH Access

Workaround:  
Notes:

https://support.kemptechnologies.com/hc/en-us/articles/200541289-Securing-the-LoadMaster-Access


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