Why is the firewall dropping RADIUS UDP packets when both inbound and outbound ports are opened? I am trying to authenticate against a RADIUS server running on my 2008 web server. I have added the correct ports 1812 and 1813 UDP to the firewall policy and yet still the packets are dropped. I switched logging on and the log clearly states that its dropping these packets??? If I disable the firewall and try again everything works fine. Any help would be appreciated as this is becoming a joke now and I am looking at other firewall resources instead. Thanks in advance.

Hi, Thank you for your post here. In Windows Server 2008, once NPS role is installed on the server 4 rules will be automatically created for incoming RADIUS authentication and accounting. Network Policy Server (legacy RADIUS Accounting –UDP-In) Port: 1646 Network Policy Server (legacy RADIUS Authenticating –UDP-In) Port: 1645 Network Policy Server (RADIUS Accounting –UDP-In) Port: 1813 Network Policy Server (RADIUS Authenticating –UDP-In) Port: 1812 Do you customize the rules for RADIUS? How it works if you delete those rules and reinstall the NPS role to generate those rules automatically? NPS and Firewalls http://technet.microsoft.com/en-us/library/cc732902.aspx