MCSEHi, Here is my setup. ISA Server (With DNS Server) connected to internet with FIX ip. No Active Directory installed on ISA server. Another server in my internal network working as a web server & mail server (merak mail server). The services SMTP and HTTP, hosted by my internal server, is published and working fine from internal or internet without any problem. The mail server includes a web base mail package (like exhcaange OWA) but it is published on alternate port like i have to access it http://sitename:4096. Insede my network this feature working fine, but when i try to access this site from internet , error comes "10060- CONNECTION TIME OUT". I create a customized protocol definition and publish this service with Server Publishing, but i not able to access this webmail from internet. I also create a packet filter for tcp port 4096, but this specificy 4096 port address is not working from internet. Thanks for any help -------------------------------------------------------------------------- Marcos Antônio Malfatti - MCP ID: 2892075 Analista de Suporte - Departamento de Tecnologia da Informação Agrícola Fraiburgo S/A - www.agricolafraiburgo.com.br Certificada ISO 9001:2000, APPCC, EUREPGAP e PIM --------------------------------------------------------------------------