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Home > Archive > VPN > July 2006 > DHCP over VPN
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| mikeyc@camino-net.com 2006-07-31, 1:12 am |
| Hello,
I am kinda stuck here and i thought i could maybe get some help from
this newsgroup. What i am trying to do is this. I have a sonicwall pro
200 firewall at my office, i have 2 netgear fvs318 vpn routers at 2
remote locations. I have the VPN already working between the 2 fvs318
boxes as per netgears default setup instructions. Now what i want to
do is have the netgear's connect to the sonicwall at my office.(this
part i can handle) HOWEVER the part i am having problem with is this,
how do i configure the sonicwall and netgear's so the clients behind
the netgear's routers pull their ip address via dhcp from the sonicwall
OVER THE VPN. I know alot of people will tell me "isnt that going to
result in excess broadast traffic" I know that objection, But we still
want to go forward with this as it stands.
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| Mike Drechsler - SPAM PROTECTED EMAIL 2006-07-31, 1:12 am |
| mikeyc@camino-net.com wrote:
> Hello,
> I am kinda stuck here and i thought i could maybe get some help from
> this newsgroup. What i am trying to do is this. I have a sonicwall pro
> 200 firewall at my office, i have 2 netgear fvs318 vpn routers at 2
> remote locations. I have the VPN already working between the 2 fvs318
> boxes as per netgears default setup instructions. Now what i want to
> do is have the netgear's connect to the sonicwall at my office.(this
> part i can handle) HOWEVER the part i am having problem with is this,
> how do i configure the sonicwall and netgear's so the clients behind
> the netgear's routers pull their ip address via dhcp from the sonicwall
> OVER THE VPN. I know alot of people will tell me "isnt that going to
> result in excess broadast traffic" I know that objection, But we still
> want to go forward with this as it stands.
The trick is to setup DHCP forwarding or DHCP relay in the remote device
(Netgear). If the Netgear is not capable of this then you may have
trouble. The Netgear will catch the broadcast packets and forward them
to the destination IP that you would need to configure if you have this
option in your router. You will want to make sure your VPN tunnels are
very stable before using this feature or your DHCP clients will not
obtain an IP when the tunnel is down.
You may not be able to setup a DHCP pool on the Sonicwall that does not
correspond to a physical device. I'm not sure if it's possible to
configure these remote IP pools, I have only tried this using either a
UNIX or Windows server as the DHCP server. None of the cheap devices I
use can supply multiple pools of IP addresses from the built in DHCP
server. It looks possible to setup multiple pools on the Nortel
Contivity VPN router devices I use but I have never tried this kind of
configuration using it as the server.
--
WARNING! Email address has been altered for spam resistance.
Please remove the -deletethispart-. section before replying directly.
Mike Drechsler (mike-newsgroup@-deletethispart-.upcraft.com)
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