Security & SSL

Managing firewall port mappings

Open port tunnels, authorize SSH keys, and configure strict VPS ingress boundaries.

3 min read · Updated May 15, 2026

1. Go to your Account and select the Security tab.
2. Review the active Port Mappings table.
3. To open a new port (e.g. 3306 for remote MySQL), click 'Add Ingress Rule'.
4. Specify the external port, target internal port, and protocol (TCP or UDP).
5. Upload SSH public keys to block password-based root SSH logins on port 22.

For security reasons, DockSpin blocks all non-essential ingress ports by default. Ports 80 (HTTP) and 443 (HTTPS) are always open. If you need database access, we recommend using SSH tunnels rather than exposing your database port to the open internet. If you must open a port, configure IP restrictions so only authorized source IPs can connect.