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 Post subject: VPN - packet broadcasting
PostPosted: Tue Oct 25, 2011 5:13 am 
Little Foot
Little Foot

Joined: Tue Apr 22, 2008 9:24 am
Posts: 126
Is it possible to route broadcast packets between subnets on a vpn connect? Ie: having broadcast packets from subnet 255.255.255.0 able to reach subnet 255.255.255.255, and vice versa? would I need to set up a routing table for this?

I have a linksys wrt54g with the custom firmware http://www.dd-wrt.com/site/index
loaded into it. but I'm just kinda stuck on this part.


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 Post subject: Re: VPN - packet broadcasting
PostPosted: Tue Oct 25, 2011 5:02 pm 
8086
8086

Joined: Tue Feb 16, 2010 10:04 am
Posts: 90
The problem is that most networks treat broadcasts from other networks as potentially hostile, at least by default, and refuse to route them. And I suspect VPNs by default will do the same thing (I just tried to issue a WOL request over a Microsoft PPTP VPN, didn't work). And I'm not aware of any means to force the VPN to accept it (doesn't mean it's not there somewhere, I'm just personally not aware of any).

Probably your best bet would be to use a router/desktop on the far side of the VPN connection and have it drop a broadcast message LOCALLY. IOW, avoid the routing issues completely and just do it while established on the remote network. I know dd-wrt has the means to do this within its interface, and I've even seen scripts developed to do it by name. And nothing says you couldn’t establish a dd-wrt router on the remote network solely for this purpose (rather than need a remote desktop session).


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