IGMP - setup the right values



  • Good evening,

    I'm now on PFSense 2.1 Rel. And want to config the igmp settings. The values for the two lans are simple. But I dont know where the multicast traffic comes from the wan side!? Setup is:

    modem <- pfsense (dials up) <- networks

    I just read a how to on http://pfsensesetup.com/igmp-proxy-configuration-in-pfsense/ but it says I should put a 0.0.0.0 and cdir as 0 in it. But I must chose a cdir between 1-32. I cant select 0?!

    Please help me for the correct settings.

    I also get the firewall log that 239.255.255.250:1900 is blocked. Could that be solved with the correct value?
    ![Bildschirmfoto 2013-09-15 um 20.21.34.png](/public/imported_attachments/1/Bildschirmfoto 2013-09-15 um 20.21.34.png)
    ![Bildschirmfoto 2013-09-15 um 20.21.34.png_thumb](/public/imported_attachments/1/Bildschirmfoto 2013-09-15 um 20.21.34.png_thumb)


  • Netgate Administrator

    Not mentioned in that guide is the firewall rule:

    @https://doc.pfsense.org/index.php/IGMP_Proxy:

    You also need a firewall rule on the downstream side (typically LAN) that matches/passes this traffic which has the advanced option checked to allow packets with IP Options.

    This is different (I think) to the 239.255.255.250:1900 logs you are seeing. Those are probably a server on your LAN trying to announce itself via UPNP.

    Steve