OT: Linking a new network to the LAN

[Boaz Bezborodko]

I figured someone here would now how to resolve this problem.

I have a machine using an Allen-Bradley PLC that is addressed to 
10.1.1.x while my LAN is 192.168.1.x.  I need to let the machine's 
designer have access to the PLC via the internet in order to make a 
small change to the program.  I have set up a VPN server connection on 
my computer for him to access the network, but he still can't access the 
PLC.  His A-B support told him that I would need to add a router to the 
machine and set it up to look at my network as a WAN while using port 
forwarding to access the PLC.

It seems to me that there should some other way to get access to the PLC 
using either my router or my Linux server to do this.

The router suggestion seems relatively easy, but inelegant and I have to 
get a router to do it.

Any other suggestions on how to link the networks?

Boaz

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