From: jfmezei.spamnot@vaxination.ca   
      
   Some Guy wrote:   
      
   > Multicast Pass Through:  Enable / Disable   
      
   You can safely disable this because Bell's DSLAMs and BAS will block   
   them.  They are not able to handle multicast packets.   
      
   However, Bell's IPTV service uses multicast packets. This is only on   
   VDSL2 service and arrives to you in a different VLAN and doesn't pass   
   through the BAS router.   
      
   When you tune in to chanmel X, the tuner tells the nearest router you   
   want to subscribe to packets address to multicast address a.b.c.d.  From   
   that point on, the router sends you a copy of every packet addressed to   
   a.b.c.d. it gets. (and sends a copy to anyone else served by thatr outer   
   who wants to get them). If the router doesn't aleady get those packets,   
   it sends a subscription requests up the line to get them.   
      
   So basically, the IPTV server sends one copy of the feed, and each   
   router then duplicates it to the branches of the network with each   
   branch getting just one copy.   
      
      
   (each channel has a multicast IP address, and when you want to watch   
   that channel, you signal the nearest router you wish to receive all   
   packets addressed to that multicast IP address).   
      
      
      
      
      
   > IPSec Pass Through:      Enable / Disable   
   > PPTP Pass Through:       Enable / Disable   
      
      
   I would enable them. If you ever subscribe to a VPN service outside of   
   Canada, you need your router let those pass through. You may not wish to   
   have it enable for inbound connecrion requests though.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)