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opening UDP port for gaming

Davidjpotts
Davidjpotts Posts: 3 Spectator
edited March 20 in Gaming and Gaming Related

Been battling this for over a whole year now and now I'm at my whit's end. Got everything setup for my game works WONDERFULL on the LAN but if I try to access it from the WAN nogo. I checked the port and on the LAN its open and good, when I check my WAN IP the TCP is open but UDP is closed. I have checked the routers port forwarding, the tech's have checked the settings they say its setup correctly but the port still stays closed…. They even replaced the router, still nothing. Told them it wouldn't work I've tried already hooking up my PFSense firewall still couldn't get UDP to pass. I was a 2nd tier TS for ISP and OEM's also IT manager for a very large Hotel I know what I'm talking about. I know when the issue isn't on my side and I'm being port blocked. You want to know how I know, EASY works fine with a tunnel! You guys/gals have know about this issue for OVER a year and I'm NOT paying more for a tunneling service when you said EVERYTHING would work just like my old ISP

Comments

  • HT_Greenfield
    HT_Greenfield Posts: 968 Contributor

    So all of your testing and tunneling is all intra-WAN per se? I.e. no other WAN involved? Just curious.

  • Davidjpotts
    Davidjpotts Posts: 3 Spectator

    intra-WAN never heard of that. There is LAN (local area network) and WAN (wide area network).

    Gsl8YhvtdB.jpg

    Since the tunnel works, it’s likely an ISP restriction rather than a local firewall issue. Testing a different port or bypassing the router will confirm whether it’s your ISP or router causing the issue. I have tested MANY different ports and like I have said before bypassed the router still without resolve.

  • HT_Greenfield
    HT_Greenfield Posts: 968 Contributor
    edited February 17

    🔗 https://nmap.org/book/man-port-scanning-basics.html ↳ closed ↳ A closed port is accessible (it receives and responds to Nmap probe packets), but there is no application listening on it. …

    🔗 https://nmap.org/book/man-port-scanning-techniques.html ↳ -sU (UDP scans) ↳ … A big challenge with UDP scanning is …

  • Davidjpotts
    Davidjpotts Posts: 3 Spectator

    umm yea the port is open to TCP but I cannot pass UDP upstream.

  • HT_Greenfield
    HT_Greenfield Posts: 968 Contributor

    So stick Wireshark on both the gaming server host and the laptop and then capture a mess of packets simultaneously on both ends while connecting the laptop to the gaming host, via the LAN, and on into at least a few seconds of game-play. Then stop the capture on both ends and explore the captured packets on each end so as to get an idea of the nature and heuristics of the packet exchanges. Find the UDP packet exchanges and then look back for any preceding TCP packets from the laptop to the host that may be prompting the host to then listen and send via UDP.

    Then bring the Internet into the picture by hot-spotting the cellular network off of the phone to the laptop and then repeat the whole megillah so as to determine what the catch is by comparison.

    Easier said than done but no hill for an IT hepcat. ☘️

This discussion has been closed.

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