Why do I get Error 121: "The semaphore timeout period has expired" (ERROR_SEM_TIMEOUT) when I log in via ssh

Solution Verified - Updated -

Issue

  • When Windows users log in to RHEL via ssh though putty, the following error is returned and no connection is made:
Error 121: "The semaphore timeout period has expired" (ERROR_SEM_TIMEOUT)

Environment

  • Red Hat Enterprise Linux 5
  • Windows Vista using ssh/putty

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Close

Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.