SBS 2003, Owa and remote web workplace work fine internally and from some locations it works externally.
From home I can not get in, just sits there for a very long time then page not found. However, if I connect via vpn connection to another client I can then open my browser and get into the first client's OWA or remote. This works from other clients too but not all. There doesn't seem to be a common thread, my Comcast connection doesn't work but a client with Comcast does, one with Verizon dsl works another doesn't, same with Qwest. The clients that I connect to when it works do not use the same internal ip range.
This is behind a Linksys router, BEFSR41. I'm port forwarding ports 80, 4125 and 443.
Seems like there's something else on the Linksys that's blocking access.