If your players suddenly start shouting "lag" every evening at roughly the same hour, the problem is probably not weak hardware — it is a DDoS attack. Game servers are unusually attractive targets: rival communities, banned players, or people who simply enjoy causing chaos can drive away dozens of your players with an attack that lasts only a few minutes. This guide covers the six clear signs that a game server is under a DDoS attack, how to tell them apart from ordinary performance problems, and exactly what to do in the first fifteen minutes.
The most common mistake game server owners make is blaming every slowdown on DDoS. On the surface, the two problems look almost identical. The key difference is this: with resource exhaustion the server itself is struggling; with a DDoS attack the road leading to the server is blocked.
When resources run out, CPU usage spikes, RAM fills up, and disk latency climbs — but network traffic stays at normal levels. During a DDoS attack you see the opposite picture: the packet rate on the network interface explodes, while the game process CPU usage often stays close to normal. Making this distinction correctly matters, because a wrong diagnosis leads to buying a bigger plan while the actual problem continues unchanged.
If you want the technical background on attack types, read our article on the difference between Layer 4 and Layer 7 DDoS attacks. Game servers are overwhelmingly hit by Layer 4, UDP-based floods.
Under normal conditions ping varies from player to player: one has a poor connection, another sits in a distant city. During a DDoS attack the pattern is different: every player's ping rises at the same moment and by a similar proportion. A player at 30 ms jumps to 400 ms while someone at 60 ms shoots up to 800 ms. That synchronised spike is one of the clearest indicators that the problem lies on the network path to your server, not on the player side.
To confirm, run a continuous ping test to your server from your own machine. Irregular spikes and packet loss in the replies — while a ping to an unrelated server stays clean — is strong evidence.
Every player losing connection within a few seconds while the server software has not crashed is a textbook DDoS symptom. Look at the console and the game server is still up, throwing no errors; nobody can simply reach it. A rapid burst of "timeout" and "connection lost" entries in the server log supports this reading.
A genuine software crash, by contrast, leaves a trace: a crash dump, a segmentation fault, an unhandled exception, and the process stops entirely. Process alive but unreachable means the problem is at the network layer.
If your server disappears from the in-game server browser and, at the same time, your SSH or remote desktop session becomes noticeably sluggish, the attack is aimed at your IP address rather than one service. Had only the game port been targeted, management access would have stayed responsive. Every service degrading at once indicates the incoming traffic is saturating the network interface.
The traffic graph is the most conclusive evidence. On Linux use iftop, nload, or vnstat; on Windows use Resource Monitor. A healthy game server receives far less inbound traffic than it sends outbound — players transmit small command packets while the server broadcasts large state updates to everyone.
The moment inbound traffic exceeds outbound, alarm bells should ring. For a game server this is almost always abnormal and points to a flood attack. Likewise, a packets-per-second figure that is wildly out of proportion to your player count is a strong signal.
DDoS attacks are rarely random. If your outages cluster around your busiest hours, follow immediately after an event announcement, or coincide with a rival community's event, you are looking at a targeted campaign. Hardware faults do not behave this predictably.
Record the date and time of every outage in a simple text file. That log helps you see the pattern and strengthens your case when you contact your provider.
Pay attention if your game server log fills with connection attempts that do not conform to the protocol, are empty, or are badly formatted. Repeated connection requests that never actually join the game can signal an application-layer attack. These attacks do not saturate bandwidth, but they tie up the server software and produce the same result.
Restarting the server in a panic is the most common and least useful reaction. Do this instead, in order:
Turkey (Türkçe) 
netstat or ss to a file, and copy the relevant portion of the game server log. All of this disappears once the attack stops.Surviving one attack does not mean you are ready for the next. Focus on three areas:
Host on the right infrastructure. Game servers have a very different network profile from a standard web server; they need a network that understands and can filter UDP traffic. Our game server plans run on DDoS-protected network infrastructure in our Istanbul location, which means both low latency for players in Turkey and filtered traffic. If you run an MTA community, take a look at our MTA server solutions.
Keep your IP address private. The fewer places your real server IP appears, the better. Do not run your website and your game server on the same IP, and regularly audit what leaks through Discord bots, statistics sites, and stale DNS records.
Size your resources correctly. Filtering cleans the traffic, but your server still needs the CPU and RAM to process what gets through. If you run a busy community, consider our high-performance Turkey VDS plans built on AMD Ryzen 9 9950X processors with DDR5 RAM and NVMe M2 SSD storage.
No. DDoS is an availability attack: the goal is to interrupt service, not to exfiltrate data. That said, attackers sometimes use a DDoS as a distraction to mask a simultaneous intrusion attempt, so you should also review unauthorised login attempts during and after an incident.
No. The attack originates from traffic arriving from outside, not from software running on the machine. A restart only extends your downtime and destroys the live evidence you would otherwise have collected.
It may bring short-term relief, but it is not a lasting fix. A new IP is eventually discovered too, especially for game servers where players connect directly by address. The real answer is not changing IPs but hosting on a filtered network.
Standard CDN and web application firewall services are designed for HTTP/HTTPS traffic. They do not carry the UDP traffic game servers rely on by default. They are useful for protecting your website; protecting your game server requires infrastructure that filters UDP at the network level.
In practice this is very hard. DDoS attacks are usually launched through botnets made up of compromised devices, so the IP addresses you see belong to other victims rather than the attacker. Your energy is better spent strengthening protection than tracing the source.
Unfortunately the cost of launching an attack has fallen dramatically. A rival community, a banned player, or someone simply looking for entertainment can target you regardless of your size. Small communities are in fact more fragile, because a few hours of downtime can permanently scatter the player base.
If your game server is attacked regularly and your current infrastructure cannot cope, explore our game server solutions running on DDoS-protected network infrastructure — and if you are unsure which plan fits your community, get in touch with our 24/7 support team.
