id summary reporter owner description type status component version resolution keywords cc guest host 6476 Multicast packets cannot reach Windows host and Linux guest Gowa "Under some circumstances neither Windows (host system) nor Gentoo linux (guest system) receive multicast packets (e.g. IGMP join). I have a Windows machine (A) that connects to the WAN through the other Windows machine (B) which has VirtualBox with Gentoo installed on it. Gentoo acts as a router. It uses VirtualBox' bridging (e1000) for two real ethernet interfaces: one for WAN, one for LAN. Machine (A) starts VideoLAN Client to get IP-TV. VideoLAN sends IGMP packet to multicast address (it could be sniffed by Wireshark on this machine (A)). But this packet does not reach Machine B (router). Wireshark on Windows (B) and tcpdump on Gentoo (VirtualBox) show that there are no IGMP packets at all. To fix this I do one very simple action: I stop my VirtualBox and start it again. This thing helps endeed - everything works fine after that. So, at least a kind of instable behaviour take place here. Do not know - VirtualBox problem or Windows one...? " defect closed network/hostif VirtualBox 3.1.6 duplicate multicast IGMP Linux Windows