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Provide DHCP from VPN

February 14, 2012 at 05:12:42
Specs: Windows 7
Hello there, well im having issues trying to setup my two networks, here my scenario, I have my main serverA in the main office A in the city A with windows 2008 server AD/DHCP/DNS/VPN, the vpn works with routing and remote access and have 2 nics, one nic for NAT and one for VPN access and internet.

The VPN server its working fine it delivers IPs to remote computers with dhcp and i can browse my remote network A and I have access to all the resources, all works fine, all its great, all works perfect, but, now I configured a second serverB in the office B in the city B and i want all the lan machines in the network B to get ips from the server A, but i dont want to configure a VPN access on every single machine in the network B to connect to the server A and get an IP, i want to connect serverB to serverA with vpn and rout the serverA DHCP trough the vpn access on serverB and so all the networkB machines can be in the same network as serverA with just one VPN access from serverB.

One thing more i need to make all this with 2008 server not with external routers or anything like that, like i said at this point i can connect serverB to serverA via VPN, what i can not do its to provide IPs on networkB from serverA dhcp.

Any help apreciated and thanks in advance

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February 14, 2012 at 05:19:48
Silly question, but why do you want to get your DHCP from a remote server? That sounds pretty inefficient to me. Why not just set up a DHCP server on server B?

In your position I would make server B a DC and run DHCP and DNS on it. Why go across the network whenever you want DHCP, do a DNS lookup, or need to access Active Directory?

This also has the bonus that you now have redundant DCs in case one should fail; that (IMO) is an essential.

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February 14, 2012 at 05:25:07
yes i could setup dhcp and dns server on serverB, yeah i have replicated AD from serverA to server B but i need to all the computers to be in the same network so if im in netwrokB and i look for machine it does not matter if that machine is in networkA or networkB theres gonna be just ONE machine and that gotta be transparent for the users

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February 14, 2012 at 05:31:48
i need like a virtual bridge between the vpn acces and the NAT nic on serverB, its like when you turn off dhcp server on a wifi router and connect your necwork to the lan port on the router and then all the wifi clients gets ip from the network dhcp server and not from the router dhcp server... i need something like that to happen

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February 14, 2012 at 07:40:16
Just split the zone between the DHCP servers. One serves the other 192.168.128- (for example). That way you can also have different settings for DNS server and gateway on the two subzones.

I'm not sure that you can do DHCP across a VPN without using dedicated routers, but even if you can it's not a good idea.

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