Common Issues - TheBloom46/bloommanager-wiki GitHub Wiki

Networking Problems/Inability to connect to Minecraft server

If you're running BloomManager or any Minecraft server (not a proxy server) on DigitalOcean droplets, IPV6 is preferred over IPV4. Thus, you have to tell the JVM (Java Virtual Machine) to prefer IPV4 in your start.sh. I recommend the following flags, especially in your docker images: -Djava.net.preferIPv4Stack=true -Djava.net.preferIPv6Addresses=false

IPTables and UFW

Pay careful attention to the active IPTables, UFW, or other firewall configurations. These are very important for security, but can also impede functionality.