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I have a Linux box with a couple of 3G/HSDPA modems, seen as network connections, and i would like to get each to connect to a server over SSH. The server could be the same server, and i would need each 3G modem and network to connect to the server once... For example: 2 Modems ( with GW and with GW, since most 3G modems give internal network IP addresses, but could be anything...). server is at the Linux box should be able to connect to server twice.... once though the 5.1 GW and once though the 6.1 GW. Is it possible to set this up?

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Look for a bonding howto, like on – ott-- Jul 6 '12 at 8:57
Bonding is not possible for this set-up... bonding only works (tell me if i am wrong here) if the network cards are on the same network, eg, a machine with 4GigE connections to a single switch. in this case, the IPs i am given are dynamic, on different subnets, have different gateways, dns, etc... would be nice if it worked, but it wont... – TiernanO Jul 6 '12 at 9:06
possible duplicate of Force an application to use a specific network interface – Bobby Jul 6 '12 at 9:10
Arrrr...crap, that is for OSX...might still work, though. – Bobby Jul 6 '12 at 9:11
it looks like it could work, technically, but since the server is going to have the same IP, only one route would actually be used... If i had 2 IPs on the server, which for 2 connections is not a problem, but for more, they could be, then routing would do the job... – TiernanO Jul 6 '12 at 9:29

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