Whenever I try to connect to a certain server, an error message came saying "Connection refused" and "no further information". This situation does not appear in other servers.
This situation also does not appear when I connect through another WiFi. It also doesn't appear when I use another address to connect to the server.
The version of Minecraft doesn't matter as this appears in every version. I tried relogging and redownloading Minecraft, but it does not solve the problem.
Is it because of my Firewall settings? Is it because of the WiFi settings? Is it because of the server? Which has nothing to do with me?