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311 posts

Ultimate Geek
+1 received by user: 11

Topic # 151714 2-Sep-2014 19:00
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Hi guys


I'm in need of help, in getting the right configuration.

I have a Linksys ATA Device, which I need to have connected constantly to a South African VPN server, otherwise my VOIP link won't function.

A temporary way, till I get a dedicated Device, is I want to install DD-WRT (Preferably), or XP on a virtual machine, with either VMWare, or Virtualbox, and then install an image DD-WRT's x86 port, which should keep me going, till I'm able to find an old PC (Pentium 1 preferably), that I'm happy with.

I have the feeling all DD-WRT's settings are correct, as I downloaded a prebuilt VMware DD-wrt Image, however I'm unable to get the network settings right.

I either end up crashing the entire physical network in the house, or it just doesn't function.




We have a Huawei VDSL2 Spark modem in the lounge, which serves as the DHCP server for the house (Something I want to keep, even with DD-wrt)  however the host PC, and most of the good stuff I have, is connected via a Technicolor TG582n, that we decommissioned when we Upgraded to VDSL, and seeing it's still a good modem, I'm using it as a router, but the DHCP is switched off, so everything connected to the TG582n gets the IP from the Huawei in the lounge.




What I want to do, is the Host PC (Windows 7) is connected via Wifi, to the Technicolor, and the onboard Ethernet port is freed, up as I want the output of the Ethernet to be that from DD-WRT, so I can connect it via crossover to my ATA box, because DD-wrt provides an option to use a VPN to connect, where as before I had used connectify, and I had to keep the computer constantly connected to the VPN, and Connectify was full of bugs, and I wasn't prepared to pay for full because I'm already paying the Nexus (VOIP) phone bill, and VPN hosting.


I'm unable to set it all up, and I've been trying for days, and I've been literally loosing sleep over it. 

What I need to do is this.




I need the DD-WRT virtual device to have an IP from the Huawei modem in the lounge, so I've got a WAN source, without crashing the whole physical network, If I can access the interface on all PCs within the physical network, that will be a plus, and the Ethernet port on the Desktop needs to be able to output DD-WRT, so I can connect the lead on the ATA, which needs to be constantly connected to the SA VPN, so my phone line works. Yet again, without affecting any of the devices physically attached to the Huawei, or Technicolor devices. The network's crashed so many times, by my attempts this is a last resort.




Here is a diagram of what I'm trying to achieve. It's a rough copy, so I hope someone can understand it.




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3449 posts

Uber Geek
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  Reply # 1120764 2-Sep-2014 19:16
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Are you prepared to spend $100 to make this really simple and bullet proof?

Get a Mikrotik RB750.

Set a fixed address on one of the ethernet interfaces to get it connected (perhaps

Create your VPN interface.

Create a default route for all traffic to go out the VPN interface.

Create a NAT masquerade rule to let traffic get NAT'd out the VPN interface.

Oh and probably some firewall rules if the VPN assigns a public address.

Once that is done you will simply assign the address of the Mikrotik ( to be the gateway on your Linksys ATA. Done.

Also means if you want to push any other traffic out through the VPN you can just use the Mikrotik for the gateway on them too.

7447 posts

Uber Geek
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  Reply # 1120784 2-Sep-2014 19:52
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I've done this sort of thing before using PFSense on an old computer personally, PFSense will run on anything.

311 posts

Ultimate Geek
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  Reply # 1120806 2-Sep-2014 20:30
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Thanks guys for the replies so far.




The router sounds like an option, however I'm short for cash at this stage, but I will look into it.

and Michael, pfsense sounds perfect, however I need to start looking for an old computer in the mean time.




How would I configure VMware to use pfsense?

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  Reply # 1128629 14-Sep-2014 22:07
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Your VDSL router is missing a route to your 2nd subnet thats behind the VM router. You also need to have VPN passthough enabled if you have the option on the VDSL router. If you don't have it then you will have to setup a number of different NAT rules for the VPN ports.

Don't bother will an old PC they cost more in the end with time and power use, use something low power and newer if you really don't want to use a networking appliance but you really should. There are lots of little AMD systems like HP mircoservers that run ESX just fine and are nice and cheap for a basic spec'ed one.

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