On Aug 31, 2007, at 9:07 AM, James Conway wrote:
The patch for limiting the port range used by OpenMPI sounds useful. This *is* an issue with firewalls. For a dedicated cluster behind a firewall that's ok, but for harnessing available hardware (eg, Mac OSX systems) in the wee hours its not. Gets my vote!
Note that restricting TCP ports will not allow OMPI to be used between clusters that have a firewall between them. There are other issues involved, such as public IP address mirrors, etc.
George's patch *may* allow OMPI to be used when a per-host firewall restricts which ports may be used, as long as all hosts are allowed unfettered access to the incoming port range.
-- Jeff Squyres Cisco Systems
