“Port Not Registered” Error in SCP:SL Servers

Problem Description

When hosting an SCP: Secret Laboratory server, you may encounter the following error:

[YYYY-MM-DD HH:MM:SS] Could not update server data on server list – [SECURITY VIOLATION] Specified port is not registered. Please contact your hosting provider if you believe this is an error.

This occurs when your hosting provider has pre-registered or verified all IP addresses under their ownership with SCP:SL’s central servers. This includes IPs assigned to dedicated servers, VPS, or shared hosting environments. When your server attempts to verify itself:

• The central server detects the IP is already registered.

• A new verification key (verkey) cannot be generated, preventing proper server registration.

• The server fails to appear on the public list, even if it is technically reachable(via direct connection with ip adress.).

----> You can find a list of hosting providers with pre-verified systems (where this issue may occur) here

Solutions

1. Contact Your Hosting Provider

For verified/public servers:
If you want your server to appear on the public list:

1. Ask your hosting provider to unverify/unregister the specific IP address assigned to your server.

2. Restart your server afterward to trigger a new verification attempt. (here you can find a step by step guide on how to verify your server.)

Note:

• Some providers may refuse due to shared infrastructure or policy.

• If unverification is not possible, proceed to Solution 2 and 3.

2. Use a Domain Name (Private Servers Only)

If your server is private and you own a domain:

1. Point your domain to the server’s IP (e.g., scpsl.yourdomain.com → 192.0.2.1).

2. Edit your server’s config_gameplay.txt to use the domain.
   

   server_ip: scpsl.yourdomain.com

3. Restart your server.

Key Notes:

• Players can connect via the domain (e.g., scpsl.yourdomain.com:7777).

• Domains are not supported for official verification. Verification requires a static IP address.

3. Request a Unique IP Address

Some hosting providers offer dedicated IPs for an additional fee. A unique IP ensures:

• No conflicts with pre-verified addresses.

• Smooth verification for public servers.

• If your hosting provider provides you with an Unique IP Address Restart your server afterward to trigger a new verification attempt. (here you can find a step by step guide on how to verify your server.)

Troubleshooting

If the error persists:

1. Confirm your server_ip in config_gameplay.txt matches your domain or dedicated IP.

2. Verify DNS propagation (e.g., ping yourdomain.com).

3. Ensure no firewall/proxy is blocking the server’s port.