At my job, we have our main network which consists of around 50 pcs & devices connected through switches to our dns server at 10.0.0.1/255.0.0.0 which connects to our router/gateway 10.0.0.60/255.0.0.0 & lets everyout out to the internet. The router is a Linksys BEFSX41.
Recently some people came & installed 3 pcs for truck tracking & set them up on their own mini network & gave those pcs the ips of 10.0.0.2/255.255.255.0 - 10.0.0.4/255.255.255.0 I was not a part of the process of setting their stuff up & then yesterday those people came to me & said they need to be able to remote into those pcs from our internet. Their pcs are all statically signed ip addresses & not behind another router, just a small switch, but they left me a router I can use if necessary. Their router is also the same.
The problem I'm having, is I'm not sure what needs to be changed in order to keep their mini network separate from our regular network, but also allow them to connect to the internet. I realize I could register them to our DNS & put them on the network, but the people using those tracking pcs are not people I can trust & the likely-hood of them snooping is high risk. Can the 2 routers have a vpn maybe & just bypass our regular network maybe?
I have tried running a cable from our network switch to theirs & changing their gateway to 10.0.0.60, but this didn't work & I figured it wouldn't with different subnet masks. I tried changing their ips to 10.0.1.2/255.0.0.0 - 10.0.1.4/255.0.0.0 & setting the gateway to 10.0.0.60, but this also did not work, I could not access the internet. At that point though I could ping pcs on the main network.