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  1. #1

    OpenVPN and Multicasting VLC stream

    Dear All,

    We would like to have multicast setup for our VPN clients


    Ubuntu Server details

    eth0: ip: gw: mask:
    eth1: bridged interface
    br0: ip: mask:

    Version: Linux ubuntu 2.6.28-11-server

    VPN Server: OpenVPN
    Version - openvpn_2.1~rc11-1ubuntu3_i386.deb

    VPN Interface: bridge - br0

    (as a Linux newbie we had exactly followed the steps given at help pages of Ubuntu for OpenVPN

    Other Servers / Service: installed mrouted from archive

    One of our servers in the LAN is running Video LAN server streaming Video to the LAN and VPN clients

    Video LAN Server Details:

    ip: gw: mask:

    VLC is streaming at,

    port: 1234

    LAN Client Details - ip:

    VPN Client Details - ip:

    VPN Clients are using OPENVPN gui and are connecting from WIN XP systems

    Currently, we do not face any problem with

    Ping from both LAN and VPN systems
    RDP, File Transfer is working without any problem

    LAN systems are able to connect and receive multicast

    but, the VPN client systems could not able to connect / receive the multicast Video Stream

    Suppose, if we do unicasting, even the VPN clients are able to receive the multicast Video Stream

    we have not enabled firewall -UFW and have only these iptables scripts

     sudo iptables -P INPUT ACCEPT
    sudo iptables -P OUTPUT ACCEPT
    sudo iptables -P FORWARD ACCEPT
    sudo iptables -F
    sudo iptables -X
    sudo iptables -F -t nat
    sudo iptables -F -t mangle
    sudo iptables -A INPUT -j LOG --log-prefix "INPUT_DROP:
    sudo iptables -A OUTPUT -j LOG --log-prefix "OUTPUT_DROP:
    sudo iptables -A FORWARD -j LOG --log-prefix "FORWARD:
    sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
    sudo iptables -t nat -A POSTROUTING -j ACCEPT
    and our route -n output is as follows,

    Destination     Gateway         Genmask         Flags Metric Ref    Use Iface UH    0      0        0 tun0   UG    0      0        0 tun0   U     0      0        0 eth1   U     0      0        0 eth0         UG    100    0        0 eth0
    To solve this problem, which part we should concentrate

    VPN tunnel instead of Bridge? (we tried with TUN instead of Bridge interface)

    Kindly requesting you all to help us to proceed from here

    Thanking you,

    S Ganesh

  2. #2
    Do you already have a solution to your problem? I'm also interested in a solution for this, as it should be possible to route multicast streams over OpenVPN using mrouted?

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