Playing via Hamachi.

Even when creating the server in Heroes, the IP address of the company, 192.168.1.2, is displayed at the top, although it should be a Hamachi address, right?
We tried Heroes SOD 3.2 (same versions) and WoG 3.58f. Antivirus and firewalls are disabled. What could be the problem?

The IP address should always be only from Hamachi. Problems arise from which internet connection your Campaigns uses at home – a wired connection (I personally confirmed that even through a "clean" modem, it is not possible to play). But you can easily get out of this situation – buy a wireless internet connection (on a USB stick, for example – Megafon, the cost is about 1000 rubles, rounded to 100-200) and try to connect when your partner also does not have a modem, regardless of whether it is the same type or another, otherwise all efforts are in vain, since you have eliminated this dependence, but your partner has not. Of course, a connection appears through a separate tunnel (blue, which first sends a request to the site, then to you and your opponent), but you will be able to play with joy.
UPD: I understand that the problem has been solved, but it will still be useful for the future.

I have a router. I disabled the firewall on it. We haven't tried playing yet. What else can be done with the router?

Hmm, sell it :)

It was also suggested as an option, so don't rush to dismiss it; it may still be useful to you.