I have never even heared of that particular brand of firewall, so I can't give you exact instructions, but you basically need to allow access to all the port ranges specified at this link:
http://eqlive.station.sony.com/support/tech_support/ts_network_support_firewall_proxy_info.jsp
just to also let you know, Everquest will occasionally try to reconnect to a laggy character by initiating a packet flood. Most firewall programs record this as an attack from the Sony servers. It is not an attack, it is normal. Just to let you know.