http://findports.com/article/heroes-of-might-and-magic-iii
http://dimasafo.ru/thread-686.html
but, unfortunately, all to no avail. Out of desperation, I tried Gameranger, which immediately informed me about the presence of a router and a potentially problematic connection. When I tried to connect to an opponent by launching the game from Gameranger, it froze on the splash screen with an empty menu and a clock instead of the cursor. In short, as I suspected, changing the client to create a virtual network didn't yield any results. I'm writing all this because I'm starting to lose hope. Thank you in advance for any attempts to solve the problem!