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asmwToday, when looking into <a href="https://infosec.exchange/tags/ipv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv4</a>/#ipv6 issues, I learned about <a href="https://infosec.exchange/tags/happyeyeballs" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#happyeyeballs</a> (<a href="https://en.wikipedia.org/wiki/Happy_Eyeballs" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://en.wikipedia.org/wiki/Happy_Eyeballs</a>).Such a pretty name for such an annoying problem.

MichaelQuestion to the network people out there:Are there any ISPs that are IPv6 only (without providing a NAT/whatever)?Background: Having an argument with a provider that hasn't published any AAAA records, and whilst I think that's poor form, I'm wondering if this would actually negatively affect any actual users in practice?<a href="https://mstdn.thms.uk/tags/ip" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ip</a> <a href="https://mstdn.thms.uk/tags/ipv6" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv6</a> <a href="https://mstdn.thms.uk/tags/ipv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv4</a> <a href="https://mstdn.thms.uk/tags/isp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#isp</a>

jbI’m not against April Fools RFCs, as much as questioning how many new people in ops and infrastructure actually understand networking well enough to get that this is a joke.<a href="https://datatracker.ietf.org/doc/draft-april-ipv5/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://datatracker.ietf.org/doc/draft-april-ipv5/</a><a href="https://hackers.town/tags/internet" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#internet</a> <a href="https://hackers.town/tags/ipv6" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv6</a> <a href="https://hackers.town/tags/ipv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv4</a> <a href="https://mspsocial.net/@jima" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@jima</a>

Quincy<a href="https://chaos.social/tags/IPv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#IPv4</a>-Adressen als Wertanlage

Gamliel Fishkin 🮱Разработка скрипта для распознавания капчи Cloudflare <a href="https://habr.com/ru/articles/892986/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://habr.com/ru/articles/892986/</a>Я понимаю, что иногда Cloudflare используют, чтобы скрыть настоящий <a href="https://linuxrocks.online/tags/IP" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#IP</a>-адрес сайта. Или чтобы сайт, у которого нет <a href="https://linuxrocks.online/tags/IPv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#IPv4</a>-адреса, был доступен и тем пользователям, у которых в 2025 году почему-то всё ещё нет <a href="https://linuxrocks.online/tags/IPv6" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#IPv6</a>. Было бы лучше, если бы каждый сайт за Cloudflare был доступен также в скрытосетях: <a href="https://linuxrocks.online/tags/Tor" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Tor</a> <a href="https://linuxrocks.online/tags/onion" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#onion</a>, <a href="https://linuxrocks.online/tags/I2P" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#I2P</a>.<a href="https://linuxrocks.online/tags/captcha" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#captcha</a> <a href="https://linuxrocks.online/tags/%D0%BA%D0%B0%D0%BF%D1%87%D0%B0" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#капча</a> <a href="https://linuxrocks.online/tags/Cloudflare" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Cloudflare</a> <a href="https://mastodon.ml/@rf" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@rf</a> <a href="https://mastodon.social/@russian_mastodon" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@russian_mastodon</a> <a href="https://lor.sh/@ru" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@ru</a>

Anders Gulden Olstad<a href="https://bsd.network/@jaypatelani" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@jaypatelani</a> <a href="https://snac.smithies.me.uk/justine" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@justine</a> When my web browser seems to prefer <a href="https://infosec.exchange/tags/IPv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#IPv4</a> over <a href="https://infosec.exchange/tags/IPv6" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#IPv6</a>, despite the latter being operational - is it a <a href="https://infosec.exchange/tags/Firefox" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Firefox</a> issue or a <a href="https://infosec.exchange/tags/OpenBSD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#OpenBSD</a> OS issue? I think my <a href="https://infosec.exchange/tags/OPNSense" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#OPNSense</a> gateway is innocent

WalkerIt would be nice if infosec and IT tools provided better IPv6 support. Weren't we supposed to run out of IPv4 addressees 10 years ago? What happened to the IPv6 revolution?<a href="https://infosec.exchange/tags/incidentresponse" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#incidentresponse</a> <a href="https://infosec.exchange/tags/ipv6" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv6</a> <a href="https://infosec.exchange/tags/ipv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv4</a> <a href="https://infosec.exchange/tags/infosec" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#infosec</a>

Habr[Перевод] Пишем стек TCP/IP с нуля: Ethernet, ARP, IPv4 и ICMPv4Написание собственного стека TCP/IP поначалу может показаться пугающей задачей. И в самом деле, за свой тридцатилетний срок жизни TCP впитал в себя множество спецификаций. Однако базовая спецификация остаётся относительно компактной1 — из важных частей в ней можно выделить парсинг заголовков TCP, машину состояний, отслеживание перегрузок и вычисление таймаута повторной передачи. Самые распространённые протоколы слоя 2 и слоя 3, Ethernet и IP, скромны по сравнению с сложностью TCP. В этой серии статей мы реализуем минимальный стек TCP/IP пользовательского пространства для Linux. Посты и код служат исключительно в образовательных целях, они позволят вам глубже изучить сетевое и системное программирование.<a href="https://habr.com/ru/articles/889618/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://habr.com/ru/articles/889618/</a><a href="https://zhub.link/tags/ethernet" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ethernet</a> <a href="https://zhub.link/tags/tcp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#tcp</a> <a href="https://zhub.link/tags/%D1%81%D0%B5%D1%82%D0%B5%D0%B2%D0%BE%D0%B9_%D1%81%D1%82%D0%B5%D0%BA" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#сетевой_стек</a> <a href="https://zhub.link/tags/arp" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#arp</a> <a href="https://zhub.link/tags/ipv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv4</a> <a href="https://zhub.link/tags/tcpip" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#tcpip</a> <a href="https://zhub.link/tags/ip" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ip</a>

Dan OachsNo way I can properly explain this in 500 characters, but the short version is this:Don't use a shared IP address for your website/app and expect zero issues.If your cloud hosted app/website happens to share an IP address with another app that scans the entire internet, don't be surprised if your app/website gets blocked and your customers can't reach you. :(In this case, that IP address is 199.36.158.199. Take a look at the SSL cert for all the domains hosted there. <a href="https://ipv6.social/tags/networking" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#networking</a> <a href="https://ipv6.social/tags/ipv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv4</a>

U3A CommunitiesIPv4 and IPv6 addresses 🗓️ Start: 15 April 2025 3:00 pm ⏳ End: 15 April 2025 5:00 pm15th April 2025 at 3pm UKThis month we look at IP (Internet Protocol) addresses, including both IPv4 and IPv6.  The talk includes a brief description of IPv4 addresses, problems with IPv4, IPv6 addresses and current IPv6 status.Joining details will be emailed to subscribers nearer the time.  If you aren’t a member, it’s free to join here <a href="https://u3acommunities.org/subscribe-to-computing-forum/" rel="nofollow noopener noreferrer" target="_blank">https://u3acommunities.org/subscribe-to-computing-forum/</a>.Plenty of time is reserved for discussions. <a href="https://u3acommunities.org/event/ipv4-and-ipv6-addresses/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://u3acommunities.org/event/ipv4-and-ipv6-addresses/</a>

Radio AzureusTIL about lsd(1)What an awsome addition to my lolcat arsenal!The acronym is not correctly used by me in this case, because I **know** I used LSD in the 1990's (the command in a UNIX ENV:) and LSD is just as pretty as it was psychedelic in the last century!`man lsd `An ls command with a lot of pretty colors and some other stuff.<a href="https://fuzzies.wtf/@altbot" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@altbot</a> 🖋️ <a href="https://mastodon.social/tags/bash" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#bash</a> <a href="https://mastodon.social/tags/sh" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#sh</a> <a href="https://mastodon.social/tags/zsh" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#zsh</a> <a href="https://mastodon.social/tags/ksh" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ksh</a> <a href="https://mastodon.social/tags/csh" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#csh</a> <a href="https://mastodon.social/tags/Networking" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Networking</a> <a href="https://mastodon.social/tags/IPv6" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#IPv6</a> <a href="https://mastodon.social/tags/IPv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#IPv4</a> <a href="https://mastodon.social/tags/ProxMox" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ProxMox</a> <a href="https://mastodon.social/tags/freeBSD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#freeBSD</a> <a href="https://mastodon.social/tags/Linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Linux</a> <a href="https://mastodon.social/tags/POSIX" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#POSIX</a> <a href="https://mastodon.social/tags/Programming" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Programming</a>

HabrIPv6 Deep Dive (Cisco)IPv6 (Internet Protocol version 6) – это последняя версия Интернет-протокола (IP), разработанная для решения ограничений IPv4, особенно проблемы исчерпания доступных IPv4-адресов. Сегодня мы рассмотрим всё до мельчайших деталей на устройствах CISCO. Протокол IP (Internet protocol) является протоколом сетевого уровня. В версии 4 мы имеем 32бита для поля адреса. максимум 11111111 11111111 11111111 11111111 в двоичной системе или привычное глазу 4 294 967 295. Что нам предлагает IPV6? 128 бит в поле адреса 11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111 11111111 И в десятичной системе. Т.е 2 в 128 степени. Давайте спросим у ИИ сколько это делает перейти в IPv6<a href="https://habr.com/ru/articles/892366/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://habr.com/ru/articles/892366/</a><a href="https://zhub.link/tags/ipv6" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv6</a> <a href="https://zhub.link/tags/ipv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv4</a> <a href="https://zhub.link/tags/cisco" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#cisco</a>

HabrКак создать свой VPS-сервер: пошаговое руководствоЧтобы опубликовать свой веб-сайт в сети интернет необходимо арендовать VPS — виртуальный выделенный сервер, на котором помимо самого сайта можно разместить веб-сервер, базу данных и прочее программное обеспечение, необходимое для запуска и функционирования сайта. В сегодняшней статье мы подробно разберем как создавать свой VPS-сервер, а также развернем тестовый сайт в качестве примера.<a href="https://habr.com/ru/companies/timeweb/articles/887614/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://habr.com/ru/companies/timeweb/articles/887614/</a><a href="https://zhub.link/tags/timeweb_%D1%81%D1%82%D0%B0%D1%82%D1%8C%D0%B8" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#timeweb_статьи</a> <a href="https://zhub.link/tags/vps" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#vps</a> <a href="https://zhub.link/tags/%D1%81%D0%B5%D1%80%D0%B2%D0%B5%D1%80" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#сервер</a> <a href="https://zhub.link/tags/crm" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#crm</a> <a href="https://zhub.link/tags/ram" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ram</a> <a href="https://zhub.link/tags/ip" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ip</a> <a href="https://zhub.link/tags/ssd" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ssd</a> <a href="https://zhub.link/tags/ipv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv4</a> <a href="https://zhub.link/tags/linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#linux</a> <a href="https://zhub.link/tags/windows_server" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#windows_server</a>

AskUbuntuIPv4/IPv6 implementation <a href="https://ubuntu.social/tags/ipv6" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv6</a> <a href="https://ubuntu.social/tags/source" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#source</a> <a href="https://ubuntu.social/tags/ipv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv4</a><a href="https://askubuntu.com/q/1543880/612" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://askubuntu.com/q/1543880/612</a>

LavX NewsIPv4 Addresses Now Serve as Collateral for $100M Loans: A New Era in Networking FinanceIPv4.Global has launched a revolutionary loan service that allows companies to use their IPv4 addresses as collateral, a move that could reshape the financial landscape for network operators. With IPv...<a href="https://news.lavx.hu/article/ipv4-addresses-now-serve-as-collateral-for-100m-loans-a-new-era-in-networking-finance" rel="nofollow noopener noreferrer" target="_blank">https://news.lavx.hu/article/ipv4-addresses-now-serve-as-collateral-for-100m-loans-a-new-era-in-networking-finance</a><a href="https://mastodon.cloud/tags/news" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#news</a> <a href="https://mastodon.cloud/tags/tech" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#tech</a> <a href="https://mastodon.cloud/tags/CloudComputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CloudComputing</a> <a href="https://mastodon.cloud/tags/IPv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#IPv4</a> <a href="https://mastodon.cloud/tags/NetworkingFinance" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#NetworkingFinance</a>

mansi18IPv4 Addresses & Subnetting: Your Ultimate GuideJoin CISSP training - <a href="https://infosectrain.com/courses/cissp-certification-training/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://infosectrain.com/courses/cissp-certification-training/</a><a href="https://mastodon.social/tags/IPv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#IPv4</a> <a href="https://mastodon.social/tags/Networking" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Networking</a> <a href="https://mastodon.social/tags/Subnetting" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Subnetting</a> <a href="https://mastodon.social/tags/CIDR" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#CIDR</a> <a href="https://mastodon.social/tags/PrivateIP" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#PrivateIP</a> <a href="https://mastodon.social/tags/DataNetworking" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#DataNetworking</a>

Will PetterssonIs there a standardised (or vaguely common) hostname akin to localhost that either a) only resolves to the IPv4 127.0.0.1, or only resolves to the IPv6 [::1]? In my experience, whether localhost resolves to an IPv4 or IPv6 address seems to be somewhat OS-dependent (or even system-dependent), I am wondering if there's a standard way to specify that I do want either the IPv4 version or the IPv6 version?Why did this come up, you ask? I have a service on localhost that only listens on IPv4, but today localhost resolved to [::1] and it broke. Now I fixed it easily by specifying 127.0.0.1 as the server address instead of localhost in the upstream proxy, but it did make me start wondering.Note that I've fixed my issue. I'm purely curious about standard/common hostnames for IPv4-only localhost or IPv6-only localhost. If you give me advice on fixing the problem, I'll just ignore it.<a href="https://toot.cat/tags/tcpip" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#tcpip</a> <a href="https://toot.cat/tags/ipv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv4</a> <a href="https://toot.cat/tags/ipv6" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv6</a> <a href="https://toot.cat/tags/localhost" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#localhost</a>

Pyrzout :vm:IPV4, IPV6… Hey! What Happened to IPV5? <a href="https://hackaday.com/2025/03/09/ipv4-ipv6-hey-what-happened-to-ipv5/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://hackaday.com/2025/03/09/ipv4-ipv6-hey-what-happened-to-ipv5/</a> <a href="https://social.skynetcloud.site/tags/Retrocomputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#Retrocomputing</a> <a href="https://social.skynetcloud.site/tags/networking" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#networking</a> <a href="https://social.skynetcloud.site/tags/ipv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv4</a> <a href="https://social.skynetcloud.site/tags/IPv6" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#IPv6</a>

IT NewsIPV4, IPV6… Hey! What Happened to IPV5? - If you’ve ever been configuring a router or other network device and noticed that ... - <a href="https://hackaday.com/2025/03/09/ipv4-ipv6-hey-what-happened-to-ipv5/" rel="nofollow noopener noreferrer" translate="no" target="_blank">https://hackaday.com/2025/03/09/ipv4-ipv6-hey-what-happened-to-ipv5/</a> <a href="https://schleuss.online/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#retrocomputing</a> <a href="https://schleuss.online/tags/networking" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#networking</a> <a href="https://schleuss.online/tags/ipv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv4</a> <a href="https://schleuss.online/tags/ipv6" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv6</a>

nacHat hier wer <a href="https://chaos.social/tags/pyur" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#pyur</a> und kann sagen ob man bei denen hinter einem <a href="https://chaos.social/tags/nat" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#nat</a> sitzt oder ob man eine öffentliche <a href="https://chaos.social/tags/ipv4" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv4</a> und/oder <a href="https://chaos.social/tags/ipv6" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#ipv6</a> Adresse hat?

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