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Re: [Openvpn-users] DHCP server for every branch(LAN) !


  • Subject: Re: [Openvpn-users] DHCP server for every branch(LAN) !
  • From: Leonard Isham <leonard.isham@xxxxxxxxx>
  • Date: Fri, 4 Feb 2005 21:37:26 -0500

On Sat, 5 Feb 2005 00:16:21 +0200, deep xploit <deepxploit@xxxxxxxxx> wrote:
> Hello,
> i have more than one branch(LAN) connected via ADSL.i've used openvpn
> to connect them all succesfully.
> the problem is,i want to use DHCP server for each LAN,my settings will
> be static internal ip address for every pc in the lan according to
> his/her username and MAC address.
> Reason for that setup is that ADSL connection isn't that reliable,so i
> can't depend on it,i want the DHCP server to be available all the time
> for tha LAN.
> Question:
> -each DHCP server will be configured to provide information for a
> number of clients(only the physically connected clients to it's
> lan).if the VPN is up,will every DHCP server work with it's specific
> client or there will be problems!
> in another way,can i have more than one dhcp server in my lan where
> each one is responsible for a number of users?
> -if not,can i prevent the DHCP server traffic to pass throught the VPN !
> 

One step at a time.

1. Do not use TAP/bridging or the broadcasts will take the connections
down to their knees.

2.  When using TUN/routing do not forward BOOTP (which  is what the
DHCP packet is based on).

3. DHCP will configure systems based on the subnet they originated on.
 So if your DHCP server doesn't have that subnet configured it will
not provide an IP adddress.

-- 
Leonard Isham, CISSP
Ostendo non ostento.

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