In this article we will be discussing a quick and simple method of securing and setting up your firewall to whitelist and protect your DayZ game server. Please direct yourself to the "Firewall Manager" page inside of your portal account.
For the 2302 UDP (DayZ Game Port), it is imperative to establish a firewall rule following the specifications detailed below:

Next, you must configure a filter for the Game Port, as illustrated in the example provided:

For the 2305 UDP (DayZ RCON Port), navigate to the "Ratelimiters" section, where you should create a Rate Limiter to mitigate the risk of DDoS attacks:

Afterward, return to the "Rules" section and append a new rule, integrating the Rate Limiter created earlier to fortify the RCON Port:

For the 27016 UDP (DayZ Steam Query Port), you must implement a firewall rule as delineated below:

Additionally, you need to institute a filter for the Steam Query Port, following the guidance illustrated:

Following these meticulous steps, your DayZ server will be fortified with our DDoS protection, ensuring the uninterrupted operation of your server.