Somewhat-OT, but I figure the PF-friendly OBSD gang would have more experience with this than anyone:
Working on a webmin-style admin/control-panel service for our webhosting clients. Thinking of running it on high ports like :8383 - :8888 or something. Anyone had problems with uncommon ports being blocked by corporate-firewalls? This tool is for light-personal use, so some people might need to log in from work. Wondering if anyone has seen a trend these days for most companies to block all but port 80 or something?