Subdomains

CoreSynth provides free subdomains for all game servers in the format game-name.coresynth.io.

Overview

Subdomain Format

Each game server receives a subdomain automatically upon creation:

Creating a Subdomain

Step 1 — Access Server Settings

1. Log in to CoreSynth Dashboard 
2. Go to Game Servers
3. Select your server
4. Click Settings in the control panel

Step 2 — Configure Subdomain

1. Go to Domain section
2. Enter your desired subdomain name
3. Click Save
4. Wait 5-10 minutes for DNS propagation

Custom Subdomains

Using Your Own Domain

If you have your own domain, you can create a subdomain like play.mydomain.com:

1. Log in to your domain registrar
2. Create a CNAME record:

play IN CNAME game-name.coresynth.io

3. Contact support at coresynth.io/support  for verification

Note: DNS changes may take up to 24 hours for full propagation.

Subdomains for Java and Bedrock

GeyserMC for Bedrock Crossplay

To connect Bedrock players to a Java server, use GeyserMC:

DNS Records Reference

Troubleshooting

Subdomain Not Resolving

Cause: DNS propagation not complete.

Solution:

1. Wait 5-10 minutes
2. Flush DNS cache: ipconfig /flushdns (Windows) or sudo dscacheutil -flushcache (macOS)
3. Check settings in the control panel

Connection Refused

Cause: Server not running or wrong port.

Solution:

1. Verify server is running in the control panel
2. Check firewall settings
3. Verify correct port

SSL Certificate Issues

Cause: HTTPS certificate problem.

Solution:

Note: Most game servers do not use SSL. Issues are usually browser-level only.

Next Steps

• Game Servers — All supported games
• Minecraft Setup — Minecraft server setup

Need help? Open a support ticket  or ask Alex.