Question Games only working by direct connect

Sep 7, 2019
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Our college LAN has firewall and blocked ports. But we are able to play multiplayer LAN games using direct connection by IP(from game menu or console). However, many games don't have direct connection option/console and in those cases we are unable to see/join any created LAN game servers.
We'd appreciate it if someone shed light on
  1. Why the LAN behaves like that?
  2. Can something be done to connect to LAN game servers?
  3. Can games without connect by ip option in menu be connected by ip in some way?