Question how to egress Only on ipv4? using the comcast biz router model CGA4131COM

[luv2liv]

I got an expensive proprietary logistic software to handle inventory.
for some reason, the company wants to limit my access to their server. meaning the 3 computers i have can only access it at my house. if i go elsewhere, even to neighbors, the software will be useless. fine. i will have to follow their rules. here's the vendor's email:



I had to ask Chatgpt how. and this is what i got:



i called comcast. they gave me a static v4 account so i logged into my comcast router at 10.1.10.1. made the changes as recommended by cgpt.
strangely, when i go to https://ifconfig.me i still see my ipv6, not ipv4.
what am i doing wrong?
also, when i try to add 2 more computers, the comcast router gave me error saying my ipv4 from comcast was already used. so i have to pay more to get more static ip???
pls help. what are my options? i cant dump the software, that's not an option unfortunately.

 

[luv2liv]

no one? oh man

 

[bba-tcg]

I suppose that unless you have some compelling need for IPV6, you could put the Comcast modem / router in bridge (or pass-through) mode, put another user supplied router behind it and disable IPV6 on it.

Edit: You might try disabling IPV6 on your PC first to see if it'll achieve what you're after.

 

[ch33zw1z]

the advanced NAT picture looks to configure access into your network.

If you can’t disable ipv6 from your WAN to the remote IP, the I also suggest getting your own router and put the gateway in bridge mode.

Fwiw, I have Comcast business, gateway is bridge mode, have a router. Internet sees me as ipv4.