Ryan
I don't profess to fully understand it all but I would say it is better than 5.1.2
See
http://www.e-smith.org/article.php3&mode=threaded&order=0To quote
"The firewalling code has been upgraded to include stateful packet inspection.
Packet filter and masquerading changes
The firewalling code has been rewritten to use the Linux iptables interface, and enables connection tracking to allow stateful packet filtering.
All actions which modify firewalling rules now use a new interface which preserves all existing rules. Previous versions rebuilt and reloaded all rules when modifications were required.
Specific protocol modules have been loaded to handle masquerading of FTP, TFTP and PPTP protocols.
The masquerading of all capablities of the H.323, ICQ and RTSP protocols is not supported in this release. Supported customers who require these features should contact smesupport@mitel.com to determine their availability.
The pidentd software which provided responses to IDENT queries has been replaced by oidentd. oidentd has a flexible mechanism for specifying IDENT responses and includes support for identifying netfilter masqueraded connections.
The iptstate program has been added to the release to provide a detailed view of masqueraded connections. This software is currently only available to administrators logged onto the server."
Regards
Ray Mitchell