7 Days to Die Port Configuration
What each port in your server's block does, which one your players use, and why the port is not something you set.
Your Port Is Assigned, Not Chosen
GameGrid gives every server its own block of ports out of the 28000-39000 range. Your 7 Days to Die server gets a base port from that block, and everything else it needs is derived from that base.
26900 is the port 7 Days to Die uses when you run the server yourself at home. It is not your port here, and almost certainly is not the number your players need.
The Server Port field in Settings is shown read-only for exactly this reason. It is set by the platform on every start, so editing it in a file would be overwritten the next time the server came up.
Everything your server needs is opened in the firewall automatically when it starts. There is nothing for you to forward, open or configure.
What Each Port In Your Block Does
Base port, TCP and UDP - the main game port. This is the one players connect to.
Base + 1, UDP - Steam query traffic. This is what lets your server answer the in-game server browser.
Base + 2, UDP - a second UDP game-traffic port. 7 Days to Die's UDP protocol uses the base port, base + 1 and base + 2.
Base + 2, TCP - the game's built-in web dashboard. Enabled and port-assigned by the platform, and firewalled to the host itself, like Telnet.
Base + 3, TCP - the Telnet admin interface. This one is deliberately firewalled to the host itself and is not reachable from the internet.
For example, a server whose base port is 28100 uses 28100 (TCP+UDP), 28101 (UDP), 28102 (UDP and TCP) and 28103 (TCP, host-only).
Finding the Address to Give Players
Open your server and look at the Overview tab. The Connection Info card shows Game Port and Server Address.
Server Address is the whole thing your players type - an IP address and the port together, for example 203.0.113.10:28100. The same address is shown in the status bar at the top of every server page.
Because your port is not 26900, players must always include the port. Give them the full Server Address exactly as the panel shows it.
Players enter it in the 7 Days to Die "Connect to Server" screen under Direct Connect.
Admin Ports and Security
The Telnet port (base + 3) is bound to the host only. You cannot reach it from outside, and neither can anyone else. That is deliberate - a Telnet console open to the internet is a way to lose a server.
You do not need Telnet access anyway. The Console tab in your panel sends commands to the server over that same interface, from inside the network where it is safe.
The game's own web dashboard on base + 2 is enabled and port-assigned by the platform, and Web Dashboard Enabled and Web Dashboard Port are shown read-only in Settings for that reason. Like Telnet, it is firewalled to the host itself: the live map reads it from inside the machine, and nobody can reach it from the internet. You do not need it yourself: settings, player management, the live map, the console and backups are all in the GameGrid panel.
If you believe a port is not open, do not change anything in a config file. Open a support ticket with your Service ID (Overview tab, Connection Info) and we will check the firewall rules for your instance.