nanog mailing list archives

Re: Gaming Consoles and IPv4


From: Matt Hoppes <mattlists () rivervalleyinternet net>
Date: Mon, 28 Sep 2020 08:44:49 -0400

Because it's not universally supported, poorly thought through, and no backwards compatibility.

Is there a better option? NO, not at this time. But it certainly could have been better thought through how it was implemented.

On 9/28/20 8:37 AM, Justin Wilson (Lists) wrote:
It is coming back to that, but you still have so much going on that you need the open ports.  I don’t gt why people fight IPV6 so much.


Justin Wilson
j2sw () mtin net <mailto:j2sw () mtin net>

—
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https://blog.j2sw.com - Podcast and Blog

On Sep 28, 2020, at 8:34 AM, Mike Hammett <nanog () ics-il net <mailto:nanog () ics-il net>> wrote:

Why stray away from how PC games were 20 years ago where there was a dedicated server and clients just spoke to servers?



-----
Mike Hammett
Intelligent Computing Solutions <http://www.ics-il.com/>
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------------------------------------------------------------------------
*From:*"Justin Wilson (Lists)" <lists () mtin net <mailto:lists () mtin net>>
*To:*"North American Network Operators' Group" <nanog () nanog org <mailto:nanog () nanog org>>
*Sent:*Monday, September 28, 2020 7:22:28 AM
*Subject:*Re: Gaming Consoles and IPv4

There are many things going on with gaming that makes natted IPv4 an issue when it comes to consoles and gaming in general.   When you break it down it makes sense.

-You have voice chat
-You are receiving data from servers about other people in the game
-You are sending data to servers about yourself
-If you are using certain features where you are “the host” then you are serving content from your gaming console.  This is not much different than a customer running a web server.  You can’t have more than one customer running a port 80 web-server behind nat.
-Streaming to services like Twitch or YouTube

All of these take up standard, agreed upon ports. It’s really only prevalent on gaming consoles because they are doing many functions.  Look at it another way.  You have a customer doing the following.

-Making a VOIP call
-Streaming a movie
-Running a web server
-Running bittorrent on a single port
-Having a camera folks need to access from the outside world

This is why platforms like Xbox developed things like Teredo.

Justin Wilson
j2sw () mtin net <mailto:j2sw () mtin net>

—
https://j2sw.com <https://j2sw.com/>- All things jsw (AS209109)
https://blog.j2sw.com <https://blog.j2sw.com/>- Podcast and Blog

    On Sep 27, 2020, at 9:33 PM, Daniel Sterling
    <sterling.daniel () gmail com <mailto:sterling.daniel () gmail com>> wrote:

    Matt Hoppes raises an interesting question,

    At the risk of this being off-topic, in the latest call of duty
    games I've played, their UDP-NAT-breaking algorithm seems to work
    rather well and should function fine even behind CGNAT. Ironically
    turning on upnp makes this *worse*, because when their algorithm
    probes to see what ports to use, upnp sends all traffic from the
    "magical xbox port" to one box instead of letting NAT control the
    ports. This does cause problems when multiple xboxes are behind
    one NAT doing upnp. If upnp is on and both xboxes are fully
    powered off and then turned on one at a time, things do work. But
    when upnp is off everything works w/o having to do that.

    There are many other games and many CPE NAT boxes that may do
    horrible things, but CGNAT by itself shouldn't cause problems for
    any recent device / gaming system.

    It is true that I've yet to see any FPS game use ipv6. I assume
    that's cuz they can't count on users having v6, so they have to
    support v4, and it wouldn't be worth their while to have their
    gaming host support dual-stack. just a guess there

    -- Dan



    On Sun, Sep 27, 2020 at 7:29 PM Mike Hammett <nanog () ics-il net
    <mailto:nanog () ics-il net>> wrote:

        Actually, uPNP is the only way to get two devices to work
        behind one public IP, at least with XBox 360s. I haven't kept
        up in that realm.



        -----
        Mike Hammett
        Intelligent Computing Solutions <http://www.ics-il.com/>
        
<https://www.facebook.com/ICSIL><https://plus.google.com/+IntelligentComputingSolutionsDeKalb><https://www.linkedin.com/company/intelligent-computing-solutions><https://twitter.com/ICSIL>
        Midwest Internet Exchange <http://www.midwest-ix.com/>
        
<https://www.facebook.com/mdwestix><https://www.linkedin.com/company/midwest-internet-exchange><https://twitter.com/mdwestix>
        The Brothers WISP <http://www.thebrotherswisp.com/>
        <https://www.facebook.com/thebrotherswisp><https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg>
        ------------------------------------------------------------------------
        *From:*"Matt Hoppes" <mattlists () rivervalleyinternet net
        <mailto:mattlists () rivervalleyinternet net>>
        *To:*"Darin Steffl" <darin.steffl () mnwifi com
        <mailto:darin.steffl () mnwifi com>>
        *Cc:*"North American Network Operators' Group"
        <nanog () nanog org <mailto:nanog () nanog org>>
        *Sent:*Sunday, September 27, 2020 1:22:51 PM
        *Subject:*Re: Gaming Consoles and IPv4

        I understand that. But there’s a host of reasons why that
        night not work - two devices trying to use UPNP behind the
        same PAT device, an apartment complex or hotel WiFi system, etc.

            On Sep 27, 2020, at 2:17 PM, Darin Steffl
            <darin.steffl () mnwifi com <mailto:darin.steffl () mnwifi com>>
            wrote:

            
            This isn't rocket science.

            Give each customer their own ipv4 IP address and turn on
            upnp, then they will have open NAT to play their game and
            host.

            On Sun, Sep 27, 2020, 12:50 PM Matt Hoppes
            <mattlists () rivervalleyinternet net
            <mailto:mattlists () rivervalleyinternet net>> wrote:

                I know the solution is always “IPv6”, but I’m curious
                if anyone here knows why gaming consoles are so stupid
                when it comes to IPv4?

                We have VoIP and video systems that work fine through
                multiple layers of PAT and NAT. Why do we still have
                gaming consoles, in 2020, that can’t find their way
                through a PAT system with STUN or other methods?

                It seems like this should be a simple solution, why
                are we still opening ports or having systems that
                don’t work?



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