I have a network of pc's (7) using the 192.168.3.X (255.255.255.0) addresses. They all share files and resources such as printers. On one of these pc's (with two lan cards), I have a SIEMENS dsl modem which is set to run on Router mode - uses 10.0.0.138 address. This Router/modem has dhcp and it gave my pc the ip 10.0.0.1 (this pc is also 192.168.3.1). My question is: I was to use the port forwarding option in the modem/router to direct all connection attemps to port 6677 to go to 192.168.3.6. Obviously this doesn't work when i type it down in the forwarding table in the modem. How can i merge these two networks to one? The modem/router has 4 lan ports in the back (1 is used) - model SL2-141. I connect the modem to this pc because from it i can share the internet connection using a filtering application to filter out unwanted websites. Please help - anyone.

Where is the 192.168.3.x address coming from, another router? Are there any other PCs on the 10.0.0.x subnet? Is it absolutely necessary to use a dual homed PC? Everything can go on one subnet and your filtering application should still work.

How can i merge these two networks to one? The simple answer is, put them all in the same subnet (ie: either all 10.0.0.x or all 192.168.3.x). I was to use the port forwarding option in the modem/router to direct all connection attemps to port 6677 to go to 192.168.3.6 Having never played with that type of modem/router I have no idea what is required but if the requests for port 6677 are coming in from the 10.0.0.x subnet, then you'ld need a static route set in the router to allow traffic to pass between the two subnets. Without it, your forwarding get's nowhere as it has nowhere (ie: no route between subnets) to go. Personally, I'd make it all one network using one subnet unless you have a very specific reason to have two separate subnets.

There is a registry edit to allow the two nics to forward. See the info from win2k. "Best Practices", Event viewer, host file, perfmon, are in my top 10

manage the router through internet explore by typing ip address 10.0.0.138 user name:admin (mostly) password:admin (if you don't change) at first disable DHCP on modem setting. then check deeply you will find IP ROUTING in advance setting specify your local subnet( 192.168.3.0) here and save the settings. set ip properties on each local compuer default gateway as your modem's ip address(10.0.0.138).