Wait it out
Confirmed outages need fixing on the provider's side. Nothing you do locally will change the result.
Source 引擎 · A2S_INFO
游戏服务器 casual.tf:27015 是否在运行?
Querying casual.tf:27015 on UDP port 27015 using Valve's A2S_INFO protocol.
离线
Checked 18s ago
single-source feed
every 5 min · A2S query
direct probe, not crowd-reported
服务器详情
- Players
- 0 / 0
- Latency
- 6709 ms
网络
- Host
- casual.tf
- Port
- 27015
- Transport
- UDP
结果解读
casual.tf:27015 is unreachable.
This is a confirmed outage. Most users worldwide are affected. Check the provider's status page or socials for an ETA — no client-side fix will help.
下一步操作
Check related
Scroll to related services below to see if the outage is provider-wide.
Re-run
Reload this page to re-probe — we check on-demand as well as on the 5-minute cadence.
FAQ
What does "no response to A2S_INFO" mean?
A2S_INFO is the standard Source-engine query for server name, players, map, and game. We send a UDP packet to casual.tf:27015 and wait up to 6 seconds for a reply. No reply = either the server is offline, the host blocks UDP, or the server explicitly rate-limits A2S queries (some community servers do, especially after DDoS waves).
Can players still connect if A2S fails?
Sometimes. A2S and the gameplay port are usually the same UDP port, so an A2S failure is a strong signal the server is down — but not 100%. Servers behind specific anti-DDoS appliances may filter A2S while passing valid game traffic.
What's the cadence?
Every 5 minutes from each monitoring region. Result freshness is shown in the freshness row above.
Status badge
Embed a live status badge on your site, README, or status page. Updates automatically — same status-aware SVG the rest of isitdown.io uses.
<a href="https://isitdown.io/source/casual.tf%3A27015"><img src="https://isitdown.io/badge/source/casual.tf%3A27015.svg" alt="casual.tf:27015 status"></a>
相关
方法论
- 探测方式
- We send an A2S_INFO UDP query to the server and parse the response for server name, map, game, player count, and VAC status.
- 计为宕机的条件
- The A2S_INFO query times out or returns malformed data.
- 计为降级的条件
- Reserved for servers that respond but omit required fields (e.g. player count missing).
- 细节
- Latency measures the full A2S_INFO round-trip; some servers rate-limit UDP queries, which shows as intermittent down even when players can connect.
- 频率
- Every 5 minutes, in parallel across 4 monitoring regions (US East Virginia, US West Oregon, Europe London, Asia Singapore).
- 限速目标
- If a host returns 429 or consistently drops connections from our IPs, we cap retries at 3 and report the last observed status — we do not flood the target to confirm the outage.
- 数据来源
- Direct probes from our monitoring infrastructure. We do not aggregate crowd reports, Twitter mentions, or DownDetector signals — every result on this page is a live network request.