> I have, hopefully, an easy question. I have setup a small, bridged OpenVPN
> across our different store locations under Windows XP. All seems to work well
> with one small hiccup. Occasionally, one of the client computers at one
> location will pull a DHCP lease from a router at one of the other stores.
> Needless to say, this leads to some problems. Is there a way to prevent DHCP
> traffic from crossing the VPN or a way to specify the DHCP server to be used
> under Windows XP? Thank you for your assistance.
With DHCP most clients accept the first offer it gets, and that's
usually going to be the local DHCP server, but not always depending on
conditions; this leads to the behavior your noticed. Don't use a
bridged setup if you don't want all the DHCP servers to respond to every
DHCP request. Bridging is logistically the same as connecting each site
together with a switch. If you don't want broadcast traffic (like DHCP
requests) to traverse the sites then use a routed setup with tun
adapters (not tap.)
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