<html aria-label="message body"><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">Hi,<div><br></div><div>I found a few:</div><div><br></div><div>https://www.reddit.com/r/ipv6/comments/nq1t7b/ubisoft_support_page_says_to_disable_ipv6_if/</div><div><br></div><div>https://evezone.evetech.co.za/quick-bytes/ipv6-causing-gaming-lag-disable-guide</div><div><br></div><div><a href="https://mecchaguide.com/fix/ipv6-disable-gaming/">https://mecchaguide.com/fix/ipv6-disable-gaming/</a></div><div><br></div><div>I will say that disabling a protocol for a test may be neccesary sometimes, but not permanently. If you find a problem and it may be your ISP, you should complain, if it is anything that you paid for (such as a game), you should return it and get refunded.</div><div><br></div><div>For Sony blocking, I found this one:</div><div><a href="https://www.reddit.com/r/PS4/comments/53ll53/sony_has_been_blocking_an_entire_isp_for_over_a/">https://www.reddit.com/r/PS4/comments/53ll53/sony_has_been_blocking_an_entire_isp_for_over_a/</a></div><div><br></div><div>This was discussed in NANOG many times, several years ago. I recall even OpenDNS had the same problem:</div><div><br></div><div>https://community.cisco.com/t5/opendns/opendns-doesn-t-work-with-cgnat-style-services-like-starlink/td-p/5182747</div><div><br></div><div><br></div><div><br id="lineBreakAtBeginningOfMessage"><div>
<div>Saludos,<br>Jordi<br><br>@jordipalet<br></div>
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<div><br><blockquote type="cite"><div>El 11 jul 2026, a las 15:48, sm+afrinic@elandsys.com escribió:</div><br class="Apple-interchange-newline"><div><div>Hi Jordi,<br>At 12:19 AM 11-07-2026, jordi.palet@consulintel.es wrote:<br><blockquote type="cite">If I recall correctly, one of the major "offenders" recommending disabling IPv6 was Ubisoft. I'm sure is easy to google for that and see that other software/hardware vendors did similar recommendations, while for example Microsoft, clearly states that you should not do that, even if you don't use/have IPv6 from your ISP.<br><br>The reality is that most of the networking stacks aren't "dual" but hybrid, and some local functions or automatic Microsoft features, rely on IPv6 encapsulated in IPv4.<br></blockquote><br>The information did not show up in the search results (please see my previous email). The "disable IPv6" suggestion shows up a bit less than before. I do it per site/network if I notice a connectivity problem.<br><br><blockquote type="cite">The other issue that is also easy to track with google (or your preferred search tool) is users and ISPs complaining since over 10 years ago, that Sony PlayStation Network blocks entire IPv4 ranges used in NAT444 (CGN). Other service provides did similar blockings, but PSN is the major offender and the one that cause more trouble. Up to now, once they block your ranges, they are blocked forever, unless anything changed recently.<br></blockquote><br>It is relatively common to come across sites which block the user if his/her connection is over IPv6. I have not seen anyone around here complaining about not being able to play a game because of NAT444. I mentioned previously that it may be different in other markets, e.g. https://gaming.locality.co.za/servers<br><br><blockquote type="cite">Regarding misinformation about IPv6 vs IPv4 with NAT (including the false belief NAT=security), and similar ones, there is the RFC4864 trying to clarify that. This document is a bit old (2007) and I volunteered to work on an updated version. Probably I will be able to publish a first version next month.<br></blockquote><br>I assume that you have heard of the usual excuse which is used when anyone brings that up in the relevant venue. People do not read a book if they have never heard of it or they don't find it worth their time. It's about the same for RFCs. I would not be surprised to hear that the misinformation is part of a marketing campaign to promote some products.<br><br><blockquote type="cite">What is obvious is that IPv4 public addresses are also globally routable, the difference is that you have (typically) a single address for your entire network because NAT, and that one also reveals the location of the full network and affiliation. Fingerprinting devices and hints of who may be the user behind it, is easier to do based on many other aspects than IP addresses.<br></blockquote><br>I am not disagreeing with you on that. If you scroll down the google.com page, you will see a location displayed. Younger people would not be convinced by the "reveals network and affiliation" claim as they learned about that as part of their online activities. Here's some information which can easily be used for fingerprinting a device: https://www.elandsys.com/r/69064 There is some information about ransomware at https://www.elandsys.com/r/75860 It happened even though the IPv4 addresses were not be globally routable, i.e. the network was using NAT. There is an ongoing online fraud wave over here according to the local press. Nobody claimed that it was happening because the persons' network location and affiliation were revealed through IPv6.<br><br>In my opinion, the issue, as viewed from my location, is not about gaming or what is claimed in the Masterspace Solutions' report. What people are being told does not match with reality. I took a quick look at what is advertised as being done in a country in South America with what people talk about over here. The discussions in that country were about which products work and where they fail. The discussions over here are generally corporate fluff.<br><br>There are 485 technical documents discussing IPv6. A significant number of the documents (477) are for business scenarios. The network termination point for the residential user shouldn't be a stumbling block as those documents were about IPv6 and businesses.<br><br> $ grep -i ipv6 rfc-index.txt | wc -l<br> 485<br> $ grep -il "enterprise" rfc*.txt | xargs grep -il "ipv6" | wc -l<br> 477<br> $ grep -il "cpe" rfc*.txt | xargs grep -il "ipv6" | wc -l<br> 174<br><br>If someone were to tell me that IPv6 is in used somewhere, I would expect to see some technical details, e.g. which products were used, how did it actually work, etc. I could not find that type of information in the IPv6 discussions.<br><br>Regards,<br>S. Moonesamy <br></div></div></blockquote></div><br></div><br>**********************************************<br>
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