See this article. There is a section on the Group Policy ports... http://support.microsoft.com/kb/832017 Regards, Jamie Nelson | Systems Engineer | Systems Support, Information Technology | I N T E G R I S Health | Phone 405.552.0903 | Fax 405.553.5687 | http://www.integrisok.com <http://www.integrisok.com/> From: gptalk-bounce@xxxxxxxxxxxxx [mailto:gptalk-bounce@xxxxxxxxxxxxx] On Behalf Of Jonathan Finkbiner Sent: Monday, February 25, 2008 9:48 AM To: gptalk@xxxxxxxxxxxxx Subject: [gptalk] Port Traffic For GPO Quick and easy question: What TCP port(s?) does GPO traffic traverse? I have some software firewalls deployed in the field that I believe are blocking ports needed for proper application of policies. Jonathan Finkbiner <mailto:jfinkbiner@xxxxxxx> Information Services Support Analyst Lifestyle Family Fitness <http://www.lff.com/> ********************************************************************** This e-mail may contain identifiable health information that is subject to protection under state and federal law. This information is intended to be for the use of the individual named above. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this information is prohibited and may be punishable by law. If you have received this electronic transmission in error, please notify us immediately by electronic mail (reply). This e-mail may contain identifiable health information that is subject to protection under state and federal law. This information is intended to be for the use of the individual named above. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this information is prohibited and may be punishable by law. If you have received this electronic transmission in error, please notify us immediately by electronic mail (reply).