Mac OS X 10.5.5 and Linux client running OpenSSH 5.1 cannot SSH to firewall

Symptoms:

• After updating Mac OS X with the latest update 10.5.5, customer can no longer SSH to firewalls.  However, they can SSH to other non-ScreenOS devices.  It worked fine with Mac OS X  10.5.4.
• Linux clients running OpenSSH5.1 cannot SSH to the firewall with SSH v2.  SSH v1 works fine.
• Cannot SSH to firewall after upgrading client OS that uses OpenSSH 5.1   (Enter the OS command ssh -V to check OpenSSH version on the client.)
  

1.  Work around.  With SSH v2, use the following options to the firewall:

ssh -oControlMaster=auto hostname 

Add -q to suppress any other error messages.
You can also edit your SSH client configuration file, and enter the following line if you want it to be global:


ControlMaster    auto

SSH client configuration files:
(Mac OS) /etc/ssh_config
(Linux) # user’s configuration file (~/.ssh/config)
(Linux) # system-wide configuration file (/etc/ssh/ssh_config)

OR

2.  Work around.  Use SSH v1.

 OR

3.  Upgrade to ScreenOS version with fix when they become available:  ScreenOS 5.4.0r12, ScreenOS 6.0.0r8, or ScreenOS 6.1.0r5.

OR

4.  Call JTAC to get ScreenOS patch with fix.