Access Blackholed Network from live IP on the same physical network structure
Posted on 2004-08-17
I might be trying to do something that I can’t, but here goes.
My workstation normally has a black hole IP and everything is happy; however now I need a live IP. I know the best way to do this would be to dual home my workstation, but my boss doesn’t want me to add 'stuff' to my workstation unless I /have/ to.
Here’s the network break down:
Internet comes in from our wireless T1 with the following information:
IP’s: xxx.144.209.242 – 254
Subnet Mask: 255.255.255.240
From there it goes to a 5 port switch.
One port goes to our 3Com Router / Firewall / DHCP Server
All other ports go outside servers – WWW / FTP / POP3 / etc.
The 3Com router feeds all the workstations in the office by other hubs and switches.
I have simply switched my wall line at the patch panel to hook my workstation to a switch connected to the outside instead of being hooked up to a switch on the inside black holed network.
Now what I need to do is use of the live IP; but still have access to everything on the 192.168.10.xxx network.
I have full access to the entire domain, but I’m hoping to be able to do this with only having to use my engineering server (Dual Homed) and have that bridge (if that’s even the correct term I mean route, not sure) my network connection so that if I need something on the black hole it takes my request and "routes" it onto its 192.168.10.127 connection to the private network; or if I need something on the internet it just routes my connection to the T1 like a hub or switch. Any sort of IP forwarding would most likely be a pain, as I have to have a few large ranges of ports that need live access, and they change every now and then.
Any extra information needed? Don’t hesitate to ask.
If you need a quick network map or other diagram I can put one up and give a URL to our server with the image.
Project Engineer / IT IIS Manager