Wednesday, April 23, 2003

IP Filtering for Win2k

Working on one of my server's external IP filters. Currently, I have it configured to allow VPN traffic only using the following rules:

Enable TCP/IP Filtering (All adapters) is checked.
TCP Ports permitted: 1723
UDP Ports permitted: none
IP Protcols permitted: 47

But, now I need to open it up to allow DNS traffic as well (my DNS queries are failing...). Ah, but which ports/services do I need to open? First off, there's the IANA port numbers listing which says that DNS is port 53 on TCP (and UDP?). Well, I'll start by just adding 53 to the allowed TCP port list.

posted by Wuphon's at 9:50 AM