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Need to assign public IP address

By johnnyextreme ·
I have two networks connected by a 56K leased line. On network (A) the private IPs are 10.0.0.X, on (B) 10.0.1.X. Network (A) has a Domain and a workgroup. Network (B) just workgroup. I can assign a public IP to a workstation in workgroup or domain on (A) and access it from internet, but on (B) when I assign public IP to workstation it can not be seen from internet, nor can the workstation access internet anymore. (B) accesses internet over 56K line then through router on (A). What do I need to do to assign public IP to workstation on (B)?

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Need to assign public IP address

by Gregory W. Smith In reply to Need to assign public IP ...

What you need to do is "subnet" your public IP space. If the remote subnet only needs a few addresses, the solution will be different from mine. However, the concept is the same. I'll assume your public addresses are a class C, 254 addresses. at 127.127.127.x

Net A: 10.0.0.x (subnet: 255.255.255.0)
Also a device at 127.127.127.1 (router to internet)
and a device at 127.127.127.2 (the PC or Web server)

Net B: 10.0.1.x (subnet: 255.255.255.0)
a device at 127.127.127.3 (won't work)

But if you subnet the public space on each network to 255.255.255.192, then you can have up to 2 networks with 62 devices each.
The last part of the IP address in binary will determine the network & workstation id because of the subnet mask. With a mask of .192, you will have:

00xxxxxx (invalid)
01xxxxxx (1st net: 65-126)
10xxxxxx (2nd net: 129-191)
11xxxxxx (invalid)

And program your internal routers for the 56k link to forward packets accordingly.

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Need to assign public IP address

by johnnyextreme In reply to Need to assign public IP ...

Although the solution posted here is incomplete I have contacted Greg and he has been very helpful, suggesting that I use Proxy Server to provide this machine with what appears to the outside to be a public IP address.

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Need to assign public IP address

by wpatrey In reply to Need to assign public IP ...

I think the problem lies in the fact that you are using two networks with only one router. Try using the same addressing scheme for Network A & B. If you are using manual addressing assign all machines an IP address of 10.0.0.X or just connect them to the same DHCP server.

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Need to assign public IP address

by johnnyextreme In reply to Need to assign public IP ...
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Need to assign public IP address

by curlergirl In reply to Need to assign public IP ...

Check the gateway address you are using on subnet B to access the Internet - the public IP address must use the router's public address as the gateway. I.e., if your router's public IP is 162.162.162.1, with a subnet of 255.255.255.0, your subnet B workstation should be able to use a public IP of 162.162.162.2, subnet 255.255.255.0, gateway of 162.162.162.1. Hope this helps!

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Need to assign public IP address

by johnnyextreme In reply to Need to assign public IP ...
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