1 Computer shared on 2 separate networks

fetster

fetster

fetster

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20 May 2004
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I have a laptop that is connected to a restaurant till system back of house PC which mirrors the till system software (Stock control & reports etc).

The Back Of House PC and laptop are on their own network and have their own ADSL internet connection.

We are looking to connect the restaurant to our own LAN with a fibre cable so the managers can join our network rather the ADSL connection in the restaurant and share our resources.

At the moment we log in remotely to the laptop with Logmein / Net Support Software through the ADSL connection.

Could I join our network to the network their so the laptop can be accessed locally rather than through internet connection? I still want the till system etc to use the ADSL connection there.

I'm not sure if this question is making sense - I effectively want a computer to be a member of network A & B but none of the other devices on Network A to talk to Network B Devices and Vice versa.

Can this be done, if so what do I need to look up?

Thanks
 
By the sounds of it you just need a router sat between the two networks. They can then be separate, and using the firewall features on the router you can control which PCs and which services are allowed to traverse the barrier. Do both networks A and B have their own internet connections?
 
esK` said:
In a nutshell this can't be done, a computer can't be on 2 networks simultaneously.
Click to expand...

So what has the 2nd Gigabit Ethernet port on my motherboard been doing all this time then?

Edit: And I don't even need to use that 2nd port, each NIC may only be able to be on 1 physical network at a time, but that in no way stops you from communicating to other networks. All it requires is the correct routing.
 
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Both networks A and B have their own Internet connections.

I want all of the computers on network A to be able to connect to the laptop on network B but nothing else on network B. The laptop on Network B connects to the till computer on network B. Other than the laptop on network B I don't want anything else on network B communicating with network A. Both networks A and B have their own ADSL connections using different draytek routers.

Regards

Fetster
 
Just stick a router in the middle then, and on each networks gateway (ADSL Router I'm guessing) slap in a static route to the "border router" between the two networks.
So if network A is 10.1.0.0/24 and network B is 10.2.0.0/24 then network A Gateway has a route for destination network 10.2.0.0/24 via 10.1.0.x (whatever the IP of the border router is on the A network side) and the gateway router on the B network has the reverse of that where the destination is A network via the border router IP on the B side.

As for two network not being possible.... I have one word for you VLANs. They allow one NIC to exist on many networks at the same time.

If you don't know, don't post.
 
kerrgreg said:
two nic's no gateways job done.

one nic per lan
Click to expand...

How do you propose they access the Internet with no gateways configured?

Dual NICs on SFFs isn't an option, and if it is there's still security to think about, it's harder to control what can access what that way.

Not to mention the cost of dual NICs for all the PCs, double the cabling etc. - This scenario is the reason routers were invented, why over-complicate and spend more just to avoid using one? Are they really that scary?
 
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simples its a laptop so chances are there is wireless and wired.

internet access is not stated as being needed so you can RDP to the laptop and use it as a bridge.

Failing that your could get complex and use static routing vlans and or acl's but this seems a little over kill.

Another option would be to completely merge the two networks using fire-walling or vlans to block access to devices on Network B from Network A, this might also allow you to use something like ML-PPP and bond the adsl to give greater performance.
 
kerrgreg said:
simples its a laptop so chances are there is wireless and wired.

internet access is not stated as being needed so you can RDP to the laptop and use it as a bridge.

Failing that your could get complex and use static routing vlans and or acl's but this seems a little over kill.

Another option would be to completely merge the two networks using fire-walling or vlans to block access to devices on Network B from Network A, this might also allow you to use something like ML-PPP and bond the adsl to give greater performance.
Click to expand...

I don't even.... what?
You appear to have taken an assortment of networking acronyms and arranged them amongst a sentence in no particular order. This thread is dead to me now...
 
esK` said:
In a nutshell this can't be done, a computer can't be on 2 networks simultaneously.
Click to expand...

Sometimes any sub-forum can be as funny as GD.

Skidilliplop said:
Just stick a router in the middle then, and on each networks gateway (ADSL Router I'm guessing) slap in a static route to the "border router" between the two networks.
So if network A is 10.1.0.0/24 and network B is 10.2.0.0/24 then network A Gateway has a route for destination network 10.2.0.0/24 via 10.1.0.x (whatever the IP of the border router is on the A network side) and the gateway router on the B network has the reverse of that where the destination is A network via the border router IP on the B side.
Click to expand...

This is how I'd go about it.
 
Meh I've been wrong before, We all make mistakes. I put it down to replying at 11pm and probably not reading his post properly lol!
 
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Guys, you're all wrong. He's going to require a microwave link from his computer to the router, to another router (connected through leased lines), to an 8 port switch (must be 8 port for security) and then to his computer's 2nd NIC (HAS TO BE 100MBPS NOT 1GBPS... if u pro u understand).

Hopefully I was of great help.
 
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