Is Wireshark in your network toolkit? Don’t miss SharkFest’26 EUROPE this November. Level up fast with hands-on labs, insider tips, and expert-led sessions from the people who build and use Wireshark daily. Connect with core developers, network and swap insights with fellow pros. Register now!
that's just the ones that still say curl in the user-agent header (ie the command line tool). libcurl requests don't advertise curl and many users set it to something else. The real usage is therefore much higher. It's hard to say how much of the total web traffic Fastly serves. Is it 5%? 10?
[New Release] AsBuiltReport.System.Resources v0.1.4! Check out what's new! https://github.com/AsBuiltReport/AsBuiltReport.System.Resources/releases/tag/v0.1.4 #System #Resources #AsBuiltReport #PowerShell
Release v0.1.4 · AsBuiltReport/AsBuiltReport.System.Resources
[0.1.4] - 2026-09-14 Changed Bump AsBuiltReport.Chart to version 0.3.4 to include latest charting features and improvements Bump AsBuiltReport.Diagram to version 1.0.10 to include latest diagrammi...
github.com
Also, I want the K8S cluster to support IPV6, which meant replacing Talos' default CNI (Flannel) with Cilium. (OK, it might be possible to support IPv6 with Flannel on Talos, but the Talos docs say very little about how to customize Flannel, and I wanted Cilium for other reasons too - e.g […]
Original post on hachyderm.io
hachyderm.io
Kubernetes 1.37 has been released! 🎉 I’ve just published Part 63 of “Understanding Kubernetes”, covering the main changes in this new release, in a visual way. 👉 dev.to/aurelievache... #Kubernetes #CloudNative #DevOps #CNCF #K8s @cncf.io
Understanding Kubernetes: part 63 – Kubernetes 1.37 Changelog
Serie of sketchnotes about Kubernetes. Explaining in a visual way Kubernetes principles.
dev.to
In current versions of #Wireshark, if you want to save an external capture utility configuration you have to use a profile. I'm working on an interface bookmark feature which will decouple that and make it easier to save a bunch of extcap configurations.
Pas encore revenu de vacances, mais des news qui n’attendent pas ! 🎉 Me voilà ambassadeur #CNCF, une belle reconnaissance 🤘🤩 ! #CloudNative #OpenSource
An interactive introduction to the spanning tree protocol: vincent.bernat.ch/en/blog/2026.... While the spanning tree protocol is quite old, it is still sometimes useful. This article explores it with interactive demonstrations running a real daemon (MSTPD) compiled to WebAssembly with Emscripten.
An interactive introduction to the spanning tree protocol
Root election, port roles, proposals and agreements, topology changes: explore RSTP through simulations powered by MSTPD compiled to WebAssembly.
vincent.bernat.ch
Here's what Fastly's admin UI says about curl.se. "This service saw 99.9% of its 6092997272 requests so far this month identified as bot traffic (0.0% of that bot traffic flagged malicious)" "This service saw 4244999 requests across 23 distinct DDoS events so far this month"
Wireshark 4.6.8 has been released. Cheers! These releases are brought to you by the Wireshark Foundation. If you or your employer can donate, it would help us out immensely. www.wireshark.org/docs/relnote... wiresharkfoundation.org/donate/
Calling all Wireshark Enthusiasts! SharkFest’26 EUROPE is coming to Brussels! Join the global Wireshark® community November 2–6 for five days of learning, networking, and connecting with Wireshark developers, analysts, engineers, and the core team. Don’t miss it! Register now and join the fun!
#curl performance https://daniel.haxx.se/blog/2026/08/14/curl-performance-2/
curl performance
_tldr: the live version is here:https://curl.se/perf/_ How fast is “fast” and is it good enough? Does it run as fast now as it did before or was there a regression? What exactly needs to be fast? How fast is it? These are questions that many projects and products face, and in curl we are no different. Yet, performance testing and comparisons are _hard_ and full of landmines and time-wasting efforts. For many years we have occasionally brought up the idea of a performance test suite for curl only to shut it down again because the challenges seemed hard and no one was volunteering to do this. This week it changed. ## Let’s do this I started out trying to find existing projects that host performance results for Open Source projects so that we could just feed our results something else and get great visualizations and data management. I did not find any such. I then took a look at what existing tools there are for this purpose, and most pointers seemed to suggest that Grafana is a popular and maybe even a good solution to build something like this with. But man, that is a complicated machine and it felt more than a little overwhelming just figure out where or how to start with it. I decided to postpone that take as well. ## Let _me_ do this I decided that instead of trying to do this the best and optimal way – I shouldn’t let perfect be the enemy of good – I would start out by doing the things I know how to do and take it as far as I can one step at a time. _Something should be better than nothing_. Performance testing needs decently stable system conditions so that repeated runs produce reasonably similar results, when all involved factors remain identical. This is basically impossibly to accomplish using most cloud infrastructure since those are almost always shared with countless other users. At least on the cheap and free tiers we use. We probably need our own dedicated hardware for this, but instead of trying to figure out where to get that and arrange for that, I would start by running performance tests on my own local development machine. I am a single user on this and it has many cores and runs decently fast. It should be good enough to get this going on. I created a first shell script that updates the curl source code from git, it configures and builds it. Then it runs a bunch of tests, outputs a bunch of data and logs all the output in a single log file. I started out with a few simple tests. How fast does curl download a 100 GB file from localhost, how many allocations and how big allocations does it need for a single HTTP download? My second script parses all the test log files from the previous builds and generates summaries and graphs for them. To make it possible for humans to see how the performance changes between builds and ideally to automatically detect when something changes more than what should be tolerated. As I am a graph addict already since before, and that journey has taught me a little gnuplot, I decided that even while there probably are much better tools and fancy JavaScript things that _could_ be used, I don’t know them and learning them now is an endeavor I rather avoid. So I stick to what I know and can get results with quickly. I third script is invoked from a crontab every twenty minutes, sets up some variables and invokes the runner script. Once the basics started to work, I showed my curl friends the early versions and I soon created a new git repository for the code. ## It’s live baby After a little more poking, I soon made my locally produced performance test summary get packaged and automatically transferred to the curl website after each build, and voila, the first public curl performance tests were live and public. Getting this data available immediate triggered curl developers. It only took hours until we had the first proposed changes to improve some numbers, and soon we had a few merges to that affect. Visibility really helps! The performance numbers we get are still varying to a certain degree, partially of course because I still use my machine for my daily development things, but also because most of them do real (localhost) networking and that is by its nature a little… _varying_. The system builds and runs a new round every twenty minutes and it does that using the latest commits from git. This setup makes it sometimes run many rounds on the same commit and it might also mean that it sometimes updates and get several new commits at once, so it might skip a round for some commits. I might reconsider this design later, but since it is still a twenty minute time window, the number of commits is still limited. When the script makes multiple build rounds on the same commit, it accumulates the numbers and for the graph it stores the maximum, the median and the minimum value. It helps show the variation per commit and allows us to cram more into the graphs. It is still early days, but there will be a maximum limit to how many commits that can be displayed in a single graph and still be helpful. HTTP/2 parallel download speed through 31 build rounds ## Distribution To help visualize the distribution and data spread per test, I created a separate illustration that shows the Minimum, maximum, P25, P75, Medium and Mean values in a _Box-and-Whisker Plot_. A Box-and-Whisker Plot showing the HTTP/2 parallel download speed data distribution. ## Changing conditions An obvious downside with me just storing build logs in files, is that it will not scale up to the millions. I did however decide that I’m not designing this system for that. At least not now. Performance tests are highly specific and dependent on the exact machine it runs on, the exact third party libraries and their versions that are used, the other components involved in the tests, such as the servers, and more. I expect that we will change conditions for the tests every once in a while that makes it hard to compare the current numbers with past numbers or at last hard to do much about the differences. Therefore I think the performance test numbers and values are primarily useful in the short term. To help us spot if we land something that subtly and _unintentionally_ degrades something. ## Stakes To detect extremely slow and long-term changes in performance and even making sure we can better survive wiping all the existing build logs etc, I introduced a concept I call _stakes_. As in a stake pole. A marker. An arbitrary threshold set manually for each specific test. This value can be used to measure performance test results against, now and later. As conditions change and maybe something makes the results go up or down and we are fine with those changes because they are motivated and expected, then we just change the stakes. If it works out, I might the system automatically detect and maybe highlight tests that deviate too much from its set stake (at least if done in the _wrong_ direction) . It could be a signal that something bad was merged. ## Balances As with everything in life, things are often balanced out. We already ran into this when we eagerly merged several changes to reduce the number of allocations to do a single HTTP download, only to realize that one of the optimizations we did had the side effect that it expanded the size one of the main structs. Changes in one area might come at an expense in another. With sufficient tests and data we can improve curl for users, and at the same time make sure that our improvements don’t come with a cost we are not prepared to pay. Exactly how to make the balance is of course a question we need to deal with, discuss and decide. Possibly for whatever change we do. ## The tests As I write this, we have 24 tests and a full test round completes in about six minutes on my machine. We can of course do multiple builds using different hardware, different operating systems, different build options, different third party libraries and different test servers to check more angles of performance, and I am certainly open for and prepared to do that going forward. I will however first let this single-flavor run for a while so that we get more data, get a change to tweak it and make it as usable as possible for curl developers. As with everything there is no end to what we _can_ make this do. This is a start. I sure we can take it further as we move along. In particular if people join in and help out. Both with ideas and proposals for visualizations, graphs and new tests to add, but also with actual pull-requests and code. ## Build volumes and graphs Over the last year, we have merged, on average, about 10 commits per day. If we keep this pace up and this performance test setup can show 100 commits conveniently into a single graph, that is just ten days of development. Probably not enough. Once we reach one hundred builds or so in the first graphs I need to consider adding separate _long term_ graphs that use select data-points to display data development over a longer time. Some googling told me the Largest-Triangle-Three-Buckets, or LTTB for short, is a fine algorithm to use for this. I now do a separate “long term” graph that “downsamples” the full range down to something that can be shown in a reasonable way. I suppose we will see properly in the future how this works. ## Spotting change The _stake_ thing I mentioned is one way to help us spot gradual performance changes over time. Another googling told me that there’s a _Mann-Kendall Test + Sen’s Slope_ algorithm to use to identify trends in graphs like this and it can be used to plot a trend. It might work as a helper to better identify… yeah, the data _trend_ for each test. The HTTP/2 parallel download speed trend at a specific moment ## Developing This setup has only existed for a few days. There is lots to do, lots to learn and much more to experiment with. Your comments, help and pull-requests will be appreciated!
daniel.haxx.se
#Wireshark 4.6.8 has been released. Cheers! These releases are brought to you by the Wireshark Foundation. If you or your employer can donate, it would help us out immensely. www.wireshark.org/docs/relnote... wiresharkfoundation.org/donate/
On this date seven years ago, we did HTTP/3 with #curl for the first time: https://daniel.haxx.se/blog/2019/08/05/first-http-3-with-curl/
First HTTP/3 with curl
In the afternoon of August 5 2019, I successfully made curl request a document over HTTP/3, retrieve it and then exit cleanly again. (It got a 404 response code, two HTTP headers and 10 bytes of content so the actual response was certainly less thrilling to me than the fact that it actually delivered that response over HTTP version 3 over QUIC.) The components necessary for this to work, if you want to play along at home, are reasonably up-to-date git clones of curl itself and the HTTP/3 library called quiche (and of course quiche’s dependencies too, like boringssl), then apply pull-request 4193 (build everything accordingly) and run a command line like: `curl --http3-direct https://quic.tech:8443` The host name used here (“quic.tech”) is a server run by friends at Cloudflare and it is there for testing and interop purposes and at the time of this test it ran QUIC draft-22 and HTTP/3. The command line option `--http3-direct` tells curl to attempt HTTP/3 immediately, which includes using QUIC instead of TCP to the host name and port number – by default you should of course expect a HTTPS:// URL to use TCP + TLS. The official way to bootstrap into HTTP/3 from HTTP/1 or HTTP/2 is via the server announcing it’s ability to speak HTTP/3 by returning an Alt-Svc: header saying so. curl supports this method as well, it just needs it to be explicitly enabled at build-time since that also is still an experimental feature. To use alt-svc instead, you do it like this: `curl --alt-svc altcache https://quic.tech:8443` The alt-svc method won’t “take” on the first shot though since it needs to first connect over HTTP/2 (or HTTP/1) to get the alt-svc header and store that information in the “altcache” file, but if you then invoke it again and use the same alt-svc cache curl will know to use HTTP/3 then! ## Early days Be aware that I _just_ made this tiny GET request work. The code is not cleaned up, there are gaps in functionality, we’re missing error checks, we don’t have tests and chances are the internals will change quite a lot going forward as we polish this. You’re of course still more than welcome to join in, play with it, report bugs or submit pull requests! If you help out, we can make curl’s HTTP/3 support better and getting there sooner than otherwise. ## QUIC and TLS backends curl currently supports two different QUIC/HTTP3 backends, ngtcp2 and quiche. Only the latter currently works this good though. I hope we can get up to speed with the ngtcp2 one too soon. quiche uses and requires boringssl to be used while ngtcp2 is TLS library independent and will allow us to support QUIC and HTTP/3 with more TLS libraries going forward. Unfortunately it also makes it more complicated to use… The official OpenSSL doesn’t offer APIs for QUIC. QUIC uses TLS 1.3 but in a way it was never used before when done over TCP so basically all TLS libraries have had to add APIs and do some adjustments to work for QUIC. The ngtcp2 team offers a patched version of OpenSSL that offers such an API so that OpenSSL be used. ## Draft what? Neither the QUIC nor the HTTP/3 protocols are entirely done and ready yet. We’re using the protocols as they are defined in the 22nd version of the protocol documents. They will probably change a little more before they get carved in stone and become the final RFC that they are on their way to. ## The libcurl API so far The command line options mentioned above of course have their corresponding options for libcurl using apps as well. Set the right bit with CURLOPT_H3 to get direct connect with QUIC and control how to do alt-svc using libcurl with CURLOPT_ALTSVC and CURLOPT_ALTSVC_CTRL. All of these marked EXPERIMENTAL still, so they might still change somewhat before they become stabilized. ## Update Starting on August 8, the option is just `--http3` and you ask libcurl to use HTTP/3 directly with CURLOPT_HTTP_VERSION.
daniel.haxx.se
Anyone using HTTP/2 server push with libcurl? If you use this feature in libcurl, please let us know. It is being deprecated all over, including in specs, browsers and servers and I believe the time has come for us to drop it from libcurl in the future as well. So I'm curious to know if anyone […]
Original post on mastodon.social
mastodon.social
Petit récit à propos de Kubernetes : comment redéployer ou mettre à jour des apps déployées via kustomize (ou kubectl apply) par helm ? Je voulais reprendre la main avec helm, ce n’était pas si rapide que je voulais. j.hommet.net/migrer-argoc... #Kubernetes #Helm #Devops
De Kustomize à Helm : migrer Argo CD sans perdre l'état du cluster
Migrer une application déployée avec Kustomize vers Helm pose un problème méconnu : Helm repose sur des annotations et labels de propriété que les …
j.hommet.net
Gateway API v1.6: TCPRoute and UDPRoute Graduate to Standard-
Gateway API v1.6: TCPRoute and UDPRoute Graduate to Standard
The Kubernetes SIG Network community is thrilled to share the release of Gateway API v1.6.0, which was released on June 30th of this year! Gateway API has become the standard for modern, role-oriented,...
kubernetes.io
What the bliss taught us https://daniel.haxx.se/blog/2026/08/03/what-the-bliss-taught-us/ #curl
What the bliss taught us
At this exact moment curl’s summer of bliss 2026 ends. We (the maintainers of curl) took the entire month of July off from vulnerability reporting and in this post I will try to explain how this went. (If you feel like skipping the wordy blab below, the single word answer is: _fine_) **This was possibly our best project decision in a long while.** ## Zero vulnerability reports Already before this, we have been refusing to answer emails about vulnerabilities. Partly because we can’t keep track of them that way but even more so because it makes it much harder to properly disclose and publish the entire report sequence after the fact. On our Hackerone page we informed visitors that we were on pause and that they could come back in August. We had I believe _one_ vulnerability report sent to my private email address in this period in spite of that messaging, but for all intents and purposes this worked out exactly as good as we hoped it would. I just ignored that email. That was easy. ## Bliss The effect was almost immediate. Just a few days into the bliss, my fellow curl maintainers all agreed with me that we felt a sense of relief, of vacation and that a load had been taken off our chests. We felt free, _unchained_ , and now suddenly able to do what we wanted. We could now spend time reviewing some of the queued up pull-requests for features and changes we like. We could suddenly again work on code in areas we had been leaving behind lately as vulnerability reports sucked all the air out the room. We polished details on the website, we found document gaps to tighten. It felt like the good old days again. The _fun_ days. We got reminded why we do Open Source and how fun it is. We took time off, saw some other corners of the world and enjoyed some time away from the keyboards. We truly healed and re-energized. ## CNA Before we took off on the bliss, we were informed in clear terms that the CNA rules (we are a CNA) mandate that we must respond within 72 hours for some critical vulnerabilities so we can’t just ignore them. I told them sure we can, but in the worst case case our “root” could do some emergency assignments. I figured the risk was minimal and it turns out I was right, Nothing like that was needed and no CVE assignments were necessary during the bliss. ## Customers I got a curious question or two from existing support customers on how the bliss would affect them, but that was easy: it did not affect them. Now, post-bliss, I think they all can confirm that it really did not. ## New customers? As I promised to keep up the contact with and support for paying customers even during the bliss, you could possibly imagine that this would have been an incentive for worried commercial curl users out there to sign up for support contracts. This did not happen – at all. By this I think we should conclude that (commercial) curl users were not worried either. ## The outside world Lots of fellow open source maintainers and most people in my surrounding have been super positive and downright supportive of our _taking some time off_. I can’t recall having receiving a single negative comment about the curl summer of bliss! ## Fellow blissers I was moved to see that several other Open Source projects followed our example and also took some time off in order to recharge and relax. In addition to giving us a little vacation, it helps sending a signal and a reminder that Open Source is to a large extent done voluntarily and even maintainers need a break at times. ## Major incidents? Have we opened ourselves up for dangerous attacks and flaws now? Have the bad guys an edge on all curl users out there now because we lived in bliss for a month? We don’t know yet, but it would surprise me. ## Queues During this slow-down, we slowly got more open issues and pull-requests lingering on GitHub than usual. No surprise there. Once we started to come back to life again, we have since managed to return them back to the normal amounts. ## Flood gates Yes, there is an obvious risk that there are now a whole range of queued up reports that will hit us in a short period time as we open up for vulnerability reports again. Presumably the risk for duplicates among these reports should also be significantly higher than usual. I suppose I need to do an update post in a month or two and let you know what happened. We always treat vulnerability reports and project security with topmost priority and we will continue to do so. We will simply work with what we have and make sure our users and by extension, the world, are safe. Since I am a member of a few other (non-curl) security teams that did not have a summer of bliss, I have seen that the flood of vuln reports have not really slowed down so it might depend a lot on the details of each specific project. ## Some emails were read All individual curl maintainers of course handled this gift in their own ways. We did not all just disconnect to sit on a remote beach for the whole time. Some of us did that part of the time, but we mostly enjoyed the lower stress level and the absence of pressure. It was mentally relaxing. So, even if some of us kept up with emails, occasionally responded to issues or even submitted some pull requests of our own, it was still vacation. It was still blissful. ## Rebliss? Will we do another summer/winter of bliss? I think yes. It was simply great, with virtually no downsides for the people involved but instead lots of positiveness. Ideally a reduced workload going further will remove the need for another one, but it is not easy to tell what the future holds. ## Just transfers After all, curl just does transfers. Fast. Reliably. Secure.
daniel.haxx.se
Entre une sortie 🏖️ et un petit cocktail 🍹, je vous propose une petite réflexion de notre métier dev face à l'IA. Pas de vérité, juste ma vision, posée pendant ce moment de coupure 🤗. philippart-s.github.io/blog/2026-08...
👩💻Le dev est mort, vive le dev ! 🧑💻
If you strike me down, I shall become more powerful than you can possibly imagine. ©Obi-Wan
philippart-s.github.io
I would like us to make an effort to move #curl's HTTPS-RR and ECH support out of experimental mode before end of year 2026. https://curl.se/mail/lib-2026-07/0013.html
curl: HTTPS-RR and ECH
curl.se
Comment éviter d'avoir trop de LoadBalancers dans votre cluster avec les MergeGateways ;) www.vrchr.fr/posts/2026/0...
Envoy Gateway : 1 seul LoadBalancer avec MergeGateways
Éviter la prolifération de LoadBalancers avec Envoy Gateway : la feature mergeGateways pour partager un seul Service LB entre plusieurs Gateways d'un cluster Kubernetes.
vrchr.fr
Comment avoir un certif TLS sur une IP, avec une page "jolie" www.vrchr.fr/posts/2026/0...
Envoy Gateway : backend par défaut & certificat IP
Servir une page de maintenance par défaut sur une Envoy Gateway, en HTTPS, même sans FQDN, grâce aux certificats Let's Encrypt sur adresse IP via le profil shortlived.
vrchr.fr
Comme c'est assez calme ces jours-ci (et que j'ai terminé l'upgrade de mes clusters #k8s pour l'été), je vous propose 2 articles qui étaient dans mes brouillons. On parle Envoy Gateway !
[New Release] AsBuiltReport.Microsoft.AD v1.0.2! Check out what's new! https://github.com/AsBuiltReport/AsBuiltReport.Microsoft.AD/releases/tag/v1.0.2 #Microsoft #ActiveDirectory #AsBuiltReport #PowerShell #MicrosoftMVP #MVPBuzz #cybersecurity #infosec
Release v1.0.2 · AsBuiltReport/AsBuiltReport.Microsoft.AD
[1.0.2] - 2026-07-27 Changed Bump module version to 1.0.2 Upgrade AsBuiltReport.Chart module to version 0.3.4 Fixed Fix #264 Fix #260 Fix critical issue preventing report execution. Fix cmdlet C...
github.com
Je vais visiter Lyon en famille demain! des recommandations ?! On ne connais pas du tout !
I'm at #SharkFest this week and someone brought in a vintage protocol analyzer. As you can see, looking at network traffic used to require gear that was a) specialized and b) heavy.
Calling all SharkFest'26 US attendees and Wireshark users! We are running a conference special on the Wireshark Certified Analyst (WCA) exam. Use voucher code SFUS26 for $100 off. Purchase by August 19th, and take the exam by December 30th. Register on: webassessor.com/wireshark