The GISTware system is completely HTML 3.2 compliant, and will not have problems with proxies or firewalls. If your firewall is preventing you from accessing the GISTware system, contact your local system administrator.
Feel free to contact us (GISTware) at staff@gistware.com, or at +1.310.376.3888 (06:30-18:30 US/Pacific time, Monday through Friday).