For Exchange you will need to open port 25 for SMTP UDP 53 for DNS query and zone xfer nothing needed for the domain controller. And also ports for IMAP, POP3, or RPC, depending on how or if external users access email http and https for outlook web access publishing. And I'm sure I have missed something but not much info to go off of. __________________________________________ Kian W. Davis MCP MCSA MCSE North West Technology and Information Services Technology Engineering kian@xxxxxxxxxxxxx -----Original Message----- From: Fritz Mesedilla [mailto:fritz.mesedilla@xxxxxxxxxxxxxxxxx] Sent: Thursday, October 23, 2003 11:53 PM To: [ISAserver.org Discussion List] Subject: [isalist] firewall and windows farm Sensitivity: Confidential http://www.ISAserver.org Folks I need help with this. Would it be possible for me to put a domain controller and exchange server behind a firewall? windows farm (exchange and pdc and sdc) --- firewall --- internet What ports do I need to open? Thanks. fritz <www.mesedilla.com> --- + basta Ikaw Lord ---------------------------------------------------------------------- This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the sender immediately by e-mail and delete this e-mail from your system. Please note that any views or opinions presented in this email are solely those of the author and do not necessarily represent those of the company. Finally, the recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. Overture Media, Inc. Direct Line: (632) 635-4785 Trunkline: (632) 631-8971 Local 146 Fax: (632) 637-2206 Level 1 Summit Media Offices, Robinsons Galleria EDSA Cor. Ortigas Ave., Quezon City 1100 ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: Leading Network Software Directory: http://www.serverfiles.com No.1 Exchange Server Resource Site: http://www.msexchange.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: kian@xxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')