Brett Sheffield (he/him)<p>With Alonso's "help", I merged in restricted channel support to <span class="h-card" translate="no"><a href="https://chaos.social/@librecast" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>librecast</span></a></span> today.</p><p>This lets a receiver set a filter on an inbound <a href="https://chaos.social/tags/multicast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multicast</span></a> channel with a keyring and capabilities.</p><p>Any traffic arriving must be cryptographically signed and have a token signed by a key on the filter keyring, and have the required capability bits set, otherwise it is silently dropped by standard API recv calls like lc_channel_recvmsg().</p><p><a href="https://chaos.social/tags/librecast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>librecast</span></a></p>
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#multicast
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small circle 🕊 in calmness<p><span class="h-card" translate="no"><a href="https://tech.lgbt/@ghostzero" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>ghostzero</span></a></span> <span class="h-card" translate="no"><a href="https://social.cryptography.dog/@fluconf" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>fluconf</span></a></span> </p><p>Yes, I was similarly delighted, but found out very late. Hopped on a session.. hoping to be able to hop onto some more.</p><p>I also watched the start of a true must-see video by Brett Sheffield of <span class="h-card" translate="no"><a href="https://chaos.social/@librecast" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>librecast</span></a></span> ..</p><p>"Zen and the Art of Multicast: An Inquiry Into Values" 💗</p><p><a href="https://www.librecast.net/fluconf-2025/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">librecast.net/fluconf-2025/</span><span class="invisible"></span></a></p><p><a href="https://social.coop/tags/multicast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multicast</span></a> <a href="https://social.coop/tags/librecast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>librecast</span></a> <a href="https://social.coop/tags/nlnet" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>nlnet</span></a> <a href="https://social.coop/tags/ngi" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ngi</span></a> <a href="https://social.coop/tags/fluconf" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>fluconf</span></a> <a href="https://social.coop/tags/fluconf2025" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>fluconf2025</span></a> <a href="https://social.coop/tags/covid" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>covid</span></a> <a href="https://social.coop/tags/CoCPledge" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CoCPledge</span></a></p>
John Kristoff<p>Coincidentally, there was another way to get <a href="https://infosec.exchange/tags/Cisco" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Cisco</span></a> IOS version info. However, it required the target router to have at least some IP <a href="https://infosec.exchange/tags/multicast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multicast</span></a> functionality running on any interface.</p><p>The trick here was to to use a little known DVMRP debugging message wrapped in IGMP, which should really never be relayed across router interfaces. This debugging capability was employed by the even lesser known mrinfo debugging tool. The entire mechanism was specified in a long-expired, never finished <a href="https://infosec.exchange/tags/IETF" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>IETF</span></a> Internet-Draft, but the code for it ended up in all Juniper and Cisco routers. A paper contains some additional detail: <a href="https://dataplane.org/jtk/publications/ccr201701-igmp.pdf" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">dataplane.org/jtk/publications</span><span class="invisible">/ccr201701-igmp.pdf</span></a></p>
Daniel Lakeland<p>A graphical comparison of the distributions of time-to-completion for naive Multicast vs TCP Unicast, in multiple experiments in three different schedules. (y axis is logarithm of time in hours)</p><p>TCP clearly benefits from staggered start. Multicast doesn't seem to matter actually.</p><p><a href="https://mastodon.sdf.org/tags/librecast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>librecast</span></a> <a href="https://mastodon.sdf.org/tags/multicast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multicast</span></a> <a href="https://mastodon.sdf.org/tags/ipv6" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ipv6</span></a> <br><span class="h-card"><a href="https://chaos.social/@librecast" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>librecast</span></a></span> <span class="h-card"><a href="https://chaos.social/@dentangle" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>dentangle</span></a></span> <span class="h-card"><a href="https://chaos.social/@onepict" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>onepict</span></a></span></p>
T_X<p>Have heard of Metcalfe's law and Reed's law for the first time thanks to a <span class="h-card" translate="no"><a href="https://chaos.social/@netzpolitik_feed" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>netzpolitik_feed</span></a></span> article. Which reaffirms my believe + efforts to get <a href="https://chaos.social/tags/multicast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multicast</span></a> routing between <a href="https://chaos.social/tags/Freifunk" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Freifunk</span></a> communities working.<br>The Metalcafe's law says a network grows by value/importance proportional to the square and had a classic telephone network in mind.<br>For multicast I think Reed's law seems more fitting, which considers all potential subgroups, with an exponential value/importance.<br><a href="https://en.wikipedia.org/wiki/Reed%27s_law" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">en.wikipedia.org/wiki/Reed%27s</span><span class="invisible">_law</span></a></p>
Ecologia Digital<p>"The <a href="https://mato.social/tags/Librecast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Librecast</span></a> Project is building the software required to rebuild our internet using <a href="https://mato.social/tags/multicast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multicast</span></a>, with privacy, accessibility, and efficiency as design goals from the outset. Multicast delivers networking with consent. You only receive the data you subscribe to and can unsubscribe anytime. Each platform user will be in control by allowing the end user to choose which channels to subscribe to and leaving rendering until as late as possible."</p><p><a href="https://nlnet.nl/project/LibreCastLiveStudio/interview.html" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">nlnet.nl/project/LibreCastLive</span><span class="invisible">Studio/interview.html</span></a></p>
æ ⎎<p>how do we get proper internet-wide <a href="https://tiny.tilde.website/tags/multicast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multicast</span></a> to work, i want to play with a <a href="https://tiny.tilde.website/tags/HamRadio" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HamRadio</span></a> style open to anyone spanning tree rtp audio thing</p><p>(i dont actually want to talk to everyone on the internet with no possibility of moderation, at least for more than like 10 minutes. i just think networking is neat.)</p>
Daniel Lakeland<p>So let's use the ridiculous Mike Tyson vs white boy youtuber whoever fight to discuss what really matters here, which is the lack of IPv6 <a href="https://mastodon.sdf.org/tags/multicast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multicast</span></a> routing over the internet. In a world where everyone is forced to cooperate instead of using artificial scarcity to make money and burn carbon, a Raspberry Pi could have streamed the event to the entire world. Think about that. Of course, more importantly a single cell phone could stream protests or news events too. you see where this is going...</p>
Librecast<p>Working on Librecast allows us to do something positive while working on exciting and challenging technical problems. </p><p>We don’t do this alone. We have no competitors. Everyone who is working to improve and protect Human Rights is our ally. There are many paths to the top of this mountain. </p><p>We spoke to <span class="h-card" translate="no"><a href="https://ec.social-network.europa.eu/@EC_NGI" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>EC_NGI</span></a></span> about our work funded by <span class="h-card" translate="no"><a href="https://mastodon.social/@NGIAssure" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>NGIAssure</span></a></span> and what we've been able to build thanks to the support from <span class="h-card" translate="no"><a href="https://social.nlnet.nl/@nlnet" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>nlnet</span></a></span> and it's partners.</p><p><a href="https://chaos.social/tags/NGIAssure" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NGIAssure</span></a> <a href="https://chaos.social/tags/multicast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multicast</span></a> <a href="https://chaos.social/tags/librecast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>librecast</span></a></p><p><a href="https://ngi.eu/ngi-interviews/esther-payne-and-brett-sheffield-librecast/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">ngi.eu/ngi-interviews/esther-p</span><span class="invisible">ayne-and-brett-sheffield-librecast/</span></a></p>
John Kristoff<p>Forgotten Protocol Chronicles: Do Not Underestimate the Installed Base <a href="https://public-exposure.inform.social/post/forgotten-protocol-chronicles/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">public-exposure.inform.social/</span><span class="invisible">post/forgotten-protocol-chronicles/</span></a></p><p>"I wanted to reflect on the stubborn persistence of technologies such as: ISATAP, which is an early IPv6 transition mechanism and DVRMP AskNeighbors2, which is an experimental IP multicast debugging protocol."</p><p><a href="https://infosec.exchange/tags/IPv6" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>IPv6</span></a> <a href="https://infosec.exchange/tags/Multicast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Multicast</span></a></p>
minimoysmagician<p>Maybe it's time for a mastodon introduction...<br>Almost done studying, mostly interested in <a href="https://tech.lgbt/tags/networking" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>networking</span></a> , e.g. <a href="https://ouroboros.rocks/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">ouroboros.rocks/</span><span class="invisible"></span></a> and <a href="https://tech.lgbt/tags/multicast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multicast</span></a><br>Very interested in all (technological?) projects challenging the current status quo<br>Likes to bike everywhere, active in JNM (<a href="https://jnm.be/nl/jnm" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">jnm.be/nl/jnm</span><span class="invisible"></span></a>), a youth movement focused on nature and environment.</p>
Librecast<p><span class="h-card"><a href="https://chaos.social/@dentangle" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>dentangle</span></a></span> would like to have a chat about <a href="https://chaos.social/tags/multicast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multicast</span></a> and the <a href="https://chaos.social/tags/FosburyFlop" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FosburyFlop</span></a> </p><p><a href="https://spectra.video/w/wNCt1qQ127odxUisFXafeZ" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://</span><span class="ellipsis">spectra.video/w/wNCt1qQ127odxU</span><span class="invisible">isFXafeZ</span></a></p><p>The team here at librecast are happy to start the next tranche of funding thanks to <a href="https://chaos.social/tags/NGIAssure" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NGIAssure</span></a> and the team at <span class="h-card"><a href="https://mastodon.xyz/@NGIZero" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>NGIZero</span></a></span> </p><p>We'd also like to thank Dick Fosbury for being an inspiration. RIP Dick.</p>
Oblomov<p><span class="h-card"><a href="https://mastodon.social/@atomicpoet" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>atomicpoet</span></a></span> I've been wondering for a while now if <a href="https://sociale.network/tags/ActivityPub" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ActivityPub</span></a> could benefit from some kind of <a href="https://sociale.network/tags/multicast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multicast</span></a> / <a href="https://sociale.network/tags/broadcast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>broadcast</span></a> capabiity to reduce the number of connections to make when sending contents around the <a href="https://sociale.network/tags/Fediverse" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Fediverse</span></a>.</p>
Brett Sheffield (he/him)<p><a href="https://chaos.social/tags/intro" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>intro</span></a></p><p>Citizen of the World and Citizen of Nowhere. Australian, now living in France after spending 15 years in Scotland. Former EU citizen, now disenfranchised. Very angry about that.</p><p><a href="https://chaos.social/tags/FOSS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FOSS</span></a> hacker, working where <a href="https://chaos.social/tags/Technology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Technology</span></a> and <a href="https://chaos.social/tags/HumanRights" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HumanRights</span></a> overlap. Founded <span class="h-card"><a href="https://chaos.social/@librecast" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>librecast</span></a></span> to build a better rights-enabled Internet with <a href="https://chaos.social/tags/multicast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multicast</span></a>.</p><p>Loves <a href="https://chaos.social/tags/languages" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>languages</span></a>, <a href="https://chaos.social/tags/food" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>food</span></a>, <a href="https://chaos.social/tags/travel" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>travel</span></a> and <a href="https://chaos.social/tags/tractors" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>tractors</span></a>.</p><p>Posts mostly in English, but be ready for anything.</p><p>Lapsed <a href="https://chaos.social/tags/epee" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>epee</span></a> fencer</p><p>Trying to beat <a href="https://chaos.social/tags/LongCovid" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LongCovid</span></a> by shouting at it.</p>
Librecast<p>We want to help to develop the <a href="https://chaos.social/tags/humancentricinternet" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>humancentricinternet</span></a>. We believe that <a href="https://chaos.social/tags/multicast" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>multicast</span></a> is an important component for this. But we aren't just focusing on the tech. We work on this because we believe democracy needs a fully functioning Internet that sees censorship as damage and can route around it. </p><p><a href="https://spectra.video/w/rhw376AW12zBBypuUWHb7L" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://</span><span class="ellipsis">spectra.video/w/rhw376AW12zBBy</span><span class="invisible">puUWHb7L</span></a></p>
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