PfSense not forwarding NLB address to open ports

  • Hello,

    I have 3 x  Windows Server 2008 R2 servers on a Terminal Server farm with Network Load Balancing, this RDP has been working for 6 years.

    We just replaced the router to pfSense router, I have had experience with pfsense in the past so i know a few things here & there but i am not that knowledgeable in it.

    Let me explain the scenario.

    My ISP cable goes into the WAN port (Public IP)

    LAN cable goes into a switch which then connects the 3 terminal servers & domain, WebSrv etc.






    NLB IP:

    Before I had configured the ip port 3389 in the old router which would then redirect users to the Terminal servers which ever were less utilized.

    In the pfSense router I've added a NAT rule as per the image below, which i believe is correct. but the port is not open. I've also checked the Firewall Rule

    All other ports that were configured are open and accessible.
    If I Change the NLB IP from to any of the TS ip addresses the port opens and works but then i don't have load balancing.

    Is there anyone that can help me get this done? I need it working by monday.

  • Rebel Alliance Developer Netgate

    Do you see any errors in the system log for that? Seems like you might be hitting this:

Log in to reply