Most DDoS discussions for game hosting stop at “buy a provider with mitigation.” That advice fails the moment your attacker knows your game and stops being generic. A 400 Gbps SYN flood is easy — it gets null-routed upstream and everyone moves on. A 12 Gbps, packet-perfect, game-aware flood on UDP port 27015 is harder, because it looks enough like real players that scrubbing it costs you legitimate traffic. Here is what actually decides whether your server stays up under that second category.
1. The Three Attack Classes and Where Each One Is Defeated
- Volumetric (100 Gbps – 3 Tbps) — DNS amplification, NTP monlist, memcached reflection. Defeated entirely upstream by BGP FlowSpec and RTBH. Your server never sees a packet. Any provider with a real backbone handles this.
- Protocol / state-exhaustion (1-50 Gbps) — SYN floods, UDP floods, GRE floods, fragmented packet attacks. Defeated at the edge by stateful SYN proxies and stateless filter rules, but only if the filtering prefix is yours and not shared.
- Application / game-protocol (10 Mbps – 5 Gbps) — fake QUIC handshakes to your Rust server, fake Steam query packets to Source engine, fake RakNet pings to Minecraft. This is the one that takes down most game communities, and it is defeated by protocol-aware filtering plus rate limits, never by raw pipe size.
Pricing note: a 1 Tbps scrubbing capacity sounds impressive but is irrelevant to class three. A provider with 20 Gbps of capacity and correct Source-engine query filtering will keep your CS2 server online through a 3 Gbps application flood that a 1 Tbps-capacity provider with generic UDP filtering will fold against.
2. What “Always-On” vs “On-Demand” Actually Costs You
| Mitigation mode | Detection window | Typical first-packet time to clean | Real-world effect |
|---|---|---|---|
| Always-on inline scrubbing | None, traffic always filtered | 0 ms | No player-visible downtime; adds 0.3-1.2 ms baseline latency |
| Always-on stateless edge ACL | None | 0 ms | Cheapest, blocks only known patterns |
| On-demand BGP diversion | 30-120 s detection | 45-180 s | Players disconnect; game servers do not reconnect gracefully |
| Provider null-route | 60 s+ | Time of attack | Server unreachable until attack stops |
For a web store, a 90-second mitigation gap is invisible — requests queue and retry. For a live game session, 90 seconds of connection loss means every player is ejected, and a Minecraft or Valheim world may roll back to the last autosave. Always-on is not a luxury for game hosting; it is the only mode that preserves session state. Pay the extra 0.5 ms.
3. The Load Balancer Is Your Real Defense in Depth
No mitigation system is perfect. What saves you when filtering fails is architecture that never exposes a single origin IP. In practice:
- Front every game node with a proxy tier — Velocity for Minecraft, a UDP proxy for Steam games, or a plain L4 relay. Players connect to the proxy’s anycast IP, never to the origin.
- Rotate origin IPs behind the proxy. When the attacker finally finds an origin, you move it in minutes without a player-visible outage, because the proxy address is unchanged.
- Rate-limit per source at the proxy, not the origin. A limit of 5 packets/second/source on the query port kills scan-and-flood tooling while leaving a legitimate player’s 20-packet/second game stream untouched.
- Keep the panel and RCON off the public internet entirely. Pterodactyl or AMP behind a WireGuard tunnel and a private ACL. The single most common game-server compromise path in 2026 is still an exposed panel port, not a DoS.
4. Hardening the Kernel Before You Call the Provider
On a bare metal Linux node you control directly, these settings buy real headroom against class-two attacks:
net.ipv4.tcp_syncookies=1andnet.ipv4.tcp_max_syn_backlog=65535— SYN proxy on the host.net.ipv4.tcp_synack_retries=2— stops backscatter amplification from your own server.net.core.somaxconn=32768— game servers open far more sockets than web workloads; the default 4096 is too low.- nftables
limit rate over 200/second+dropon the game UDP port, per source IP. This alone defeats the majority of hobby-tier booters. net.netfilter.nf_conntrack_max=1048576— conntrack table exhaustion is a classic and cheap way to take down a game node.
None of this replaces upstream filtering, but it means an attack that slips past the scrubbing centre still fails to take the node offline. Defense in depth is the difference between “sustained a 3 Gbps attack with degraded tick rate” and “server down for two hours.”
5. What to Verify Before You Buy
When comparing providers on the basis of a high-traffic or attack-resistant deployment, the questions that matter are structural, not marketing. The dedicated server options compared on the main site are laid out with uplink port speed, included mitigation capacity, and IP count, which are the three line items that determine your real exposure. Ask specifically for: total scrubbing capacity per region, whether mitigation is always-on or triggered, how many clean IPs are included, and whether the provider supports BGP session setup so you can add secondary transit later.
| Deployment tier | Port speed | Included mitigation (2026 typical) | Monthly cost range |
|---|---|---|---|
| Entry game node | 1 Gbps unmetered | 5-20 Gbps, always-on | $90-140 |
| Standard community network | 10 Gbps unmetered | 20-100 Gbps, always-on + L7 | $250-420 |
| Large commercial gaming | 10-25 Gbps commit | 100 Gbps+ with BGP diversion | $700-1,500 |
For a 200-1000 player network, the standard community tier is where the value sits. A 1 Gbps port will saturate on a 1.5 Gbps reflection attack regardless of mitigation capacity, so the port speed is the binding constraint, not the scrubbing number. Budget for the 10 Gbps port before you budget for more scrubbing capacity. Note also that the mitigation tier is only half the equation — a node that is already running at 85% CPU cannot absorb the legitimate-retry storm that follows a brief scrubbing event, so the hardware sizing on the main site’s dedicated server tiers should be planned with 30-40% CPU headroom above your measured peak, purely for attack-recovery behaviour.
One further operational point: most attacks on game communities in 2026 are preceded by reconnaissance. Generic query floods, port scans, and Steam query enumeration happen for days before the real event. If your provider offers flow logs, alert on unusual scan volume against your game ports. Early warning converts a defence problem into a preparation problem, which is a much easier problem to solve.
6. The Recovery Plan Nobody Writes Down
Assume you will be taken down once. Have a documented 15-minute recovery sequence: rotate the origin IP, restore from the last world backup on the standby node, update DNS or the proxy backend, notify players in Discord with an accurate ETA. Communities that survive attacks long-term are the ones where the admin can execute that sequence while half-asleep. The mitigation tech matters, but the playbook is what stops one bad night from becoming an empty server.
Leave a Reply
You must be logged in to post a comment.