Sending multicast packets from linux guest

[andrew_gatt]

I've written a program which talks to another device on a home network using mutlicast packets.
I have set up the guest to use bridged networking, which is correctly getting an ip address from my local DHCP. When the other device sends a mutlicast packet, the guest receives it. However when the guest sends a multicast packet the other device does not receive it. Both ends are running the same code, which makes me think its something to do with how i've set up the host or virtual box.

I've come across a /proc/sys/net/ipv4/conf/all/mc_forwarding parameter, but my opensuse doesn't let me change it due to permissions, so i can't tell if this will help or not.

Does anyone have any experience doing this kind of work?

Thanks

Andrew

[Perryg]

Other than to tell you that if you can not change something due to permissions you need to be in su to obtain the necessary permission to change things.
You really should make a backup of any file you intend to modify though for your own protection.