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>This concerns UDP traffic on port 9000-65535. Does anybody know what usually runs on those ports?
by _-david-_ 4y ago
>This concerns UDP traffic on port 9000-65535.
Does anybody know what usually runs on those ports?
- rozenmd 4y agoOnline games (MMOs, shooters, etc) come to mind
- baisq 4y agoMMOs over UDP?
- Retr0id 4y agoAbsolutely
- sodality2 4y agoThat's the preferred protocol for ultra-real-time games because a few ms ago is not helpful information to spend time recovering. A sufficiently fast-moving MMO could apply
- baisq 4y agoWhat MMOs use UDP? Asking sincerely because I have never seen one.
- koolba 4y agoAnything with real time communications like an FPS would use UDP as stale action data is mostly useless. The latest state of is all that matters. Most such games will either layer their own streaming channel atop UDP for guaranteed ordered delivery of important messages or use a separate TCP socket as well.
- xnyanta 4y agoYou must not be looking very hard, pretty much every game engine uses UDP as the network transport. There are some notable exceptions like Java Minecraft.
- Daegalus 4y agoall of them, its been like that for a long time. im resurrecting an old mmo, and even then it was UDP. WoW, FFXIV, ESO, GW2, etc Some might use TCP for login and character select, but its UDP while playing.
- baisq 4y agoWoW is 100% TCP. idk about the rest.
- sascha_sl 4y agoMMOs often have TCP connections for things like chat and services like auction house (often even HTTP microservices), but most of the gameplay is still UDP.
- xmpir 4y agoI fear e.g. wireguard is affected.
- deathanatos 4y agoThat's 56,536 different ports. Half of everything (that uses UDP), more or less.
- ascar 4y agoI would expect 95%+ of TCP traffic to run on 22 (ssh), 25(smtp), 53(dns), 80(http), 443(https) plus another handful of lower than 1000 ports. Even common dev ports (3000,5000,8080) are below 9000. I don't think that's much different for UDP. Even most games probably rely on something <10,000.
- danachow 4y ago> I don't think that's much different for UDP. It is, because of the way that UDP is typically used for different applications than TCP. While there are a few old, well known TCP/UDP pairs like 53, UDP is more often used with a dynamic port assignment scheme sometimes with a coordinating TCP protocol - such as SIP/RTP for VoIP that uses >16k, WebRTC, etc. A lot of games uses ports above 10k. https://help.generationesports.com/hc/en-us/articles/360061115811-Whitelist-Ports-Services-to-Open https://help.generationesports.com/hc/en-us/articles/3600611...
- lordnacho 4y agoIsn't it most things that aren't a well-known service?
- deleted 4y ago[deleted]
- tiffanyh 4y agoI think games. Hetzner is a popular host for game servers.
- scottlamb 4y agoBesides games, I think many AV things, including VOIP and perhaps WebRTC (definitely UDP, less sure about port number). Possibly also HTTP/3; the server picks the UDP port number IIUC.
- melolife 4y agoIt's interesting that 9000 is the starting port for Ethereum consensus clients, although the participation rate does not seem to be affected.
- sascha_sl 4y agoSource ports of DNS reflection attacks, presumably.