Are there any limitations for Windows Server 2003 regarding the incoming and outgoing TCP/IP connections? If so, how to change/modify these limitations? many thanks for your help.

Not really but this one may help. Appendix A: TCP/IP Configuration Parameters http://technet.microsoft.com/en-us/library/cc739819(WS.10).aspx Regards, Dave Patrick .... Microsoft Certified Professional -Microsoft MVP [Windows]

Hi Erik, Thanks for post here. In addition with Dave’s suggestion ,you may like to consider to use windows build in firewall , it may achieve your goal. Please reference to the link below: Windows Firewall Operations Guide http://technet.microsoft.com/en-us/library/cc739696(WS.10).aspx Windows Firewall http://technet.microsoft.com/en-us/network/bb545423.aspx Meanwhile, if you are using window server 2003 as a router, then you may like to consider the inbound and outbound filter feature on Route and Remote Access Services. Configure Static Packet Filters http://technet.microsoft.com/en-us/library/dd469754(WS.10).aspx Thanks Tiger LiPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.