Quick answer: 7 Days to Die dedicated needs SteamCMD 294420, ports 26900–26902 and real RAM – 8 GB minimum.
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Frequently asked questions (FAQ)
Which ports for 7 Days to Die?
26900 TCP+UDP (game), often 26901/26902 UDP as well. Open all three or the browser times out.
RAM for 7DTD dedicated?
Small 8 GB, 8+ players or large maps 16 GB. Fast CPU, NVMe for saves.
SteamCMD app?
294420 (dedicated). After game updates always app_update or you get version mismatch.