The first interface has a public ip.
I’d like to use public ip-s on the second inteface, I have a C class ip range.
The public ip-s on the second interface side must be visible from the public net.
Does your ISP know you’ve got both IP blocks? Who’s announcing the routing for them to the rest of the Internet? You? Your ISP? If you’ve done the routing right, with the gateway for the netblock on the second interface being the IP address of the first interface, everything will simply work.
The problem is at the ISP side. I’ve logged in to one of our co-location servers at that isp, and the network on the 2nd is visible from there. But from outside it isn’t. Thanks for help.