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dual ADSL, routing packets to multiple gateways
Hi there,
I'm sysadmin for a company which has three offices (head office plus two satellites)
I know networking reasonably well, good at troubleshooting, good at hardware diagnosis, good at user support.
Bad at anything related to Cisco routers (for example, dont know how to create a routing table, but willing to learn). Quick learner.
We have a 512/512kb VPN connecting the three offices, using Draytek 2600 ADSL modem/routers.
We also have an additional 1.5Mb/256kb ADSL connection in each office using Billion and DLink ADSL modem routers.
The network also includes a switch in each office.
Each internal network uses fixed IP (no DHCP at all):
192.168.0.0/254 - head office
192.168.1.0/254 - satellite 1
192.168.2.0/254 -satellite 2
all 6 ADSL connections are fixed IP.
At the moment, only one ADSL connection is active in each office, as I do not have software/hardware to route packets to separate gateways.
I want to configure the network so that all VPN traffic is routed to the VPN connection and all other internet traffic is routed to the second connection in each office.
IOW, any packet with a 192.168.x.x destination (or UNC/SMB/mapped drives such as \\server\share) goes to the VPN gateway and anything else (typical internet) goes to the second gateway in each office.
I dont run Active Directory or a mail server.
Instead, for a variety of reasons, I use plain vanilla workgroups plus ISP based email.
I'm hoping to get this working without buying Cisco routers.
I'm considering buying NAT32 software (an Australian made software router which I could run on spare boxes in each office).
Questions:
1. Anyone recommend NAT32?
2. Any other suggestions which dont involve purchasing new hardware?
3. Anyone know if any of the new breed dual connection ADSL routers are able to route packets on a destination basis, rather than simple load balancing?
Cheers and thanks,
Diggo
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by: nomorefuzzylogicPosted on 2006-01-13 at 16:07:31ID: 15697307
Set up a routing entry on each PC for each of the other offices to route packets for that network to the VPN GAteway handling that ofice traffic. All other traffic will then go via the default gateway at each office which would be the IP address of the ADSL router for that office.
eg on the head office machines do the routes as follows:
Default Gateway - set to be the ADSL Router in head office
DNS Server - set to be the ADSL Router in head office
ROUTE ADD 192.168.1.0 MASK 255.255.255.0 192.168.0.x (IP Address of VPN Gateway to satellte 1)
ROUtE ADD 192.168.2.0 MASK 255.255.255.0 192.168.0.y (IP Address of VPN Gateway to satellite 2)
Do similar things at satellite offices but you will, presumably, only have one VPN Gateway back to head office.
If you want traffic to go between satellite 1 and satellite 2 then life on the head office LAN gets a bit more complicated if traffic is being routed through it because you will need to incorporate an intelligent router or two.