A while ago I needed to create an external trust through a firewall and created this blog entry discussing that. I decided to revisit this article with an updated article as some new technologies have come into play that can change how the firewall rules are built.
So what has changed?
Many firewalls have implemented a new filter called DCERPC. The DCERPC filter basically listens for RPC traffic and monitors what ports are requested and then dynamically open only those ports ... [More]