From 36bff6364d5d64821fe114e5bc1a8a6efebd9bd6 Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Mon, 6 Nov 2017 09:57:27 +0900 Subject: netfilter keynote at netdev 2.2: Initial commit --- 2017/netfilter-netdev2.2/davem-praying-zoom.png | Bin 0 -> 367781 bytes 2017/netfilter-netdev2.2/harald-2006.jpg | Bin 0 -> 94938 bytes 2017/netfilter-netdev2.2/james.jpg | Bin 0 -> 36200 bytes 2017/netfilter-netdev2.2/jozsef.jpg | Bin 0 -> 126703 bytes 2017/netfilter-netdev2.2/marc-ols2000-zoom.png | Bin 0 -> 475763 bytes 2017/netfilter-netdev2.2/netfilter-keynote.adoc | 673 +++++++++++++++++++++ .../netfilter-scoreboard-20020408.png | Bin 0 -> 87675 bytes .../netfilter-scoreboard-andras.png | Bin 0 -> 67883 bytes 2017/netfilter-netdev2.2/nfws2003_group.png | Bin 0 -> 633438 bytes 2017/netfilter-netdev2.2/nfws2013.jpg | Bin 0 -> 7186914 bytes 2017/netfilter-netdev2.2/nfws2014.jpg | Bin 0 -> 2355728 bytes 2017/netfilter-netdev2.2/nfws2015.jpg | Bin 0 -> 1793306 bytes 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years from 2.3 to 4.x +============================================== +:author: Harald Welte +:copyright: 2017 by Harald Welte (License: CC-BY-SA) +:backend: slidy +:max-width: 45em + +== What is this about + +[role="incremental"] +* netfilter history +* netfilter who-is-who +* netfilter anecdotes +* netfilter folklore +* netfilter world domination + + +== Context + +[role="incremental"] +* late 1990ies +* Internet was still new to many people +* Internet Security was still rather new +** think e.g. of the "ping of death" problems.I +* no git, not even subversion, but: CVS(!) +** even pre-bitkeeper, so no kernel global revision control +* no virtual machines, testing on physical boxes, long boot cycles +* no authorship annotation / commit history + +== pre-netfilter + +The pre-netfilter days + +[role="incremental"] +* Linux 1.2, 1.3 and 2.0 had `ipfwadm` (Jos Vos et al) +* Linux 2.2 had `ipchains` (Rusty Russell) +** Rusty was doing some sysadmin work at an ISP and was doing his job so well that he had plenty of spare time +** He was _immensely_ inspired by a talk by DaveM on beating the hell out of Solaris on SPARC +** wanted to do more Linux stuff, met WatchGuard +** proposd to do a proper redesign of the Linux firewall if they pay him for 6-12 months +** ... which they did, so mid-1998 to mid-1999, he hacked away on it. + +== Creation Timeline + +[quote, Rusty Russell] +Who the hell are you, and why are you playing with my kernel? +I want to clear up some people's misconceptions: I am no kernel guru. I know this, because my kernel work has brought me into contact with some of them: David S. Miller, Alexey Kuznetsov, Andi Kleen, Alan Cox. However, they're all busy doing the deep magic, leaving me to wade in the shallow end where it's safe. + +[role="incremental"] +* July 20, 1998: Rusty posts initial netfilter design to netdev list +* January 29, 1999: netfilter v0.1 released +* August 26, 1999: netfilter included in kernel 2.3.15 +* November 1999: _core team_ established with Marc Boucher + Rusty Russell + +== netfilter v0.1 + +---- +Date: 1999-01-29 10:36:34 +From: Paul Rusty Russell +Subject: [ipchains-dev] netfilter v0.1 released. + +Hi all, + +Just in case people are sick of all this "stable kernel" crap, and want their interesting behaviour back, here's the first alpha-quality cut of my new firewall/NAT/masquerading/transproxy/redirect/portforward framework, from + ftp://ftp.rustcorp.com/netfilter/netfilter-1999-01-29.tar.bz2 + +This work is a result of the vast amount of user feedback I've had on things such as transparent proxying, masquerading, ipfwadm, ipchains, etc. Includes a 400k patch against 2.2.0. (84 files changed, 2509 insertions, 12097 deletions). + +It's all set in slush at this stage, so if you have any comments, please feel free to leap forward and abuse me... +---- + +In other news of January 1999: + +* Yahoo bought Geocities +* Clinton faced impeachemnt trial + + +== netfilter merged in kernel 2.3.15 + +---- + From: Linus Torvalds + Subject: Linux-2.3.15.. + Date: Wed, 25 Aug 1999 16:36:10 -0700 (PDT) + +There's a rather huge patch-set out there now, taking the 2.3.x series to 2.3.15. [...] + +Other features that don't impact everybody, but are rather major: + +* firewalling is gone (again), replaced by an even more generic netfilter facility. +[...] + +Have fun, + Linus +---- + +In other news: + +* East Timor becomes independent of Indonesia +* Vladimir Putin becomes Prime Minister of Russia + +== Rusty (at Linux Beer Hike 2000) + +image:rusty2000.jpg[] + +== Marc (at OLS 2000) + +image:marc-ols2000-zoom.png[] + +== Core Team Timeline + +* November 1999: _core team_ established with _Marc Boucher_ + _Rusty Russell_ +* Sydney Linux Expo: _James Morris_ joins core team +* September 2000: _Harald Welte_ joins core team +* November 2001: _Jozsef Kadlecsik_ joins core tema +* August 2003: _Martin Josefsson_ joins core team +** Rusty, Marc and James become _emeritus_ members +* January 2004: _Patrick McHardy_ joins core team +* October 2005: _Yasuyuki Kozakai_ joins core team +* February 2007: _Pablo Neira_ joins core team +* October 2012: _Eric Leblond_ and _Florian Westphal_ join core team +** Harald, Martin and Yasuyuki enter _emeritus_ status + +== James (in 2008) + +image:james.jpg[width="60%"] + +== Humor + +From http://www.netfilter.org/about.html#history + +Following James' assimilation into the collective, our efforts were mainly directed towards preparations for +the release of Netfilter as part of the upcoming 2.4 kernel. _It was the dawn of the third age of Linux +firewalling; a time of great struggle and heroic deeds. It was our last, best hope for peace. Great +communities were founded, old civilizations were lost, and new alliances were formed._ James' missions during +this period included the _continued perversion of the networking code_, such that it was now possible to load +an ASN.1 parser into the kernel and _inflict grave terror upon unsuspecting SNMP packets_; and to extend the +IP stack into userspace with Perl. _Now peering squarely into the abyss, we noticed the good deeds of a young +kernel warrior_ named Harald Welte, who seemed to actually understand the NAT code. Accordingly, his +distinctiveness was added to the collective. _With balance restored, the netfilter juggernaut was now free to +accelerate into the brave new world of Linux 2.4 and face it's greatest challenge: users._ + + +== Humor + +---- +Date: Fri, 13 Oct 2000 16:26:06 +1100 +From: Rusty Russell +To: netfilter@lists.samba.org, netfilter-devel@lists.samba.org +Subject: [CORE TEAM] New Member Announce + +The Netfilter Core Team is proud to welcome Harald Welte into its hallowed botherhood. + +Harald Welte has frequently answered user questions on the mailing list, and authored the IRC connection tracking and NAT modules. He even documented what he'd done! And then fixed some of the bugs! + +This shocking and revolutionary approach to software development will fill a much-needed void in the Netfilter Team. Assuming he survives the inauguration ceremony. +---- + +In other news: + +[role="incremental"] +* Bill Gatest steps down as CEO of Microsoft + +== Harald + +image:laforge-hat.jpg[] + +== Jozsef + +---- +Date: Fri, 7 Dec 2001 21:19:57 +1100 (EST) +From: James Morris +Subject: [netfilter-announce] [ANNOUNCE] New Core Team Member - Jozsef Kadlecsik + +The Netfilter Core Team is proud to announce the addition Jozsef Kadlecsik as a new member. + +Jozsef joins us as a dedicated and talented member of the Netfilter development community. + +His demonstrated insight and high coding standards will be highly valuable assets to the project as development focus shifts to the 2.5 kernel series. + +Welcome Jozsef! + +- James, on behalf of the Netfilter Core Team. +-- +James Morris + +---- + +== Jozsef + +image:jozsef.jpg[width="40%"] + +== Martin + +image:video-not-available-youtube-error.png[] + + + +== Documentation + +One key aspect was lots of good, easy to read documentation + +* netfilter hacking HOWTO +* netfilter extensions HOWTO +* Linux 2.4 Packet Filtering HOWTO +* Linux Networking-concepts HOWTO +* NAT HOWTO + +Getting into the project as both a user or developer was helped enormously by the HOWTOs. + +The original versions of those documents were all created in early 2000. + + +== The netfilter scoreboard + +* a _scoreboard_ was established +** high-score for number of patches/contributions +** counts not only code but also documentation updates +** manually maintained by scoreboard +** bonus points for patches that apply to correct version +* motivation for developers, particularly junior ones! + +Remember, this was the pre-git and even pre-bitkeeper days! + +Guess these days, people would count this as _gamification_? + +== The netfilter scoreboard (April 2002) + +image:netfilter-scoreboard-20020408.png[] + +== The netfilter scoreboard (April 2002) + +image:netfilter-scoreboard-andras.png[] + + + +== modularity / extensibility + +* netfilter is just a set of hooks for call-back functions +* iptables matches and targets are just plug-ins for both kernel and userspace +* good documentation on the APIs and how to write one +* get people involved, implement their favorite feature + +Problem: How to distribute / maintain them? + +== patch-o-matic + +---- +1) The netfilter core team is maintaining a set of extensions / new·features which are not yet committed to the mainstream kernel tree. + +They are a collection of maybe-broken maybe-cool third-party extensions. + +Please note that you cannot apply any combination of any of those patches. Some of them are incompatible...· + +If you want to try some extensions, and be sure that they don't break each other, you can do the following: + + % ./runme base KERNEL_DIR=<> + +It will modify you kernel source (so back it up first!). You will have to recompile / rebuild your kernel and modules. + +Alternatively, if you really know what your are doing, you can use the following command in order to offer you the full list of choices. Be aware that we don't prevent you from shooting yourself in the foot. + + % ./runme extra KERNEL_DIR=<> +---- + +== patch-o-matic + +---- +Date: Mon, 30 Oct 2000 14:28:30 +1100 +From: Rusty Russell +To: Netfilter Development Mailinglist + +On Mon, Oct 23, 2000 at 09:15:23PM -1100, Daniel Stone wrote: +> This, to me, reflects a problem. Basically, I can only see two things causing this: +> a) no testing at all, or +> b) a mis-paste. Please tell me it was the latter. + +Completely untested. I looked at the patch as I threw it into patch-o-matic. + +That's what patch-o-matic is for: to get stuff out there without waiting for the Rusty Linus planet alignment thing... + +Rusty. +-- +Hacking time. +---- + +== Early Success + +What contributed to the early success with lots of devlopers wriing netfilter/iptables code: + +* loads of good documentation +* modular framework with +** netfilter hooks +** pluggable iptables targets + matches +* system for maintaining non-mainline code + merging it + +=> Everyone could easily write his favorite match/target/plugin + + +== core team emeritus members + +---- +Date: Fri, 09 Jan 2004 15:17:19 +1100 +From: Rusty Russell +Subject: [ANNOUNCE] Core Team Announces Emeritus Members + +The Netfilter Core Team has long discussed the issue of Core Team members who are no longer active. Dismissing them from the Core Team would deny them the benefits of such a prestigious title, should any become apparent. + +Hence the conclusion is that Marc Boucher, James Morris and Rusty Russell are now "emeritus"[1] members of the Netfilter Core Team. + +[...] + +[1] Latin for "burnt-out freeriding slacker", I believe. +---- + +== the story behind + +[role="incremental"] +* Until recently, I thought +** Rusty simply had too many other tempting distracting projects (kernel module loader, qemu, ...) + +[role="incremental"] +* Recently, Rustyy told me +** it was a deliberate decision to leave netfilter +** the new core team and maintainers should run the project without interference from the project father + + +== Pablos first messages + +---- +Date: Wed, 12 Nov 2003 00:06:11 +0100 +From: pablo neira +To: netfilter-devel@lists.netfilter.org +Subject: ip_conntrack_get + +Hi everyone, + +I've been for almost two weeks trying to understand netfilter code, at this point I'm trying to understand conntrack table code. + +I have a problem with how conntrack manages the ip_conntrack_info stuff. +[...] + +Don't blame me if it's obvious for you, I'm just a guy trying to understand a *really really nice piece of code*. Thanks! + +cheers, +Pablo +---- + +== Pablos first messages + +---- +Date: Wed, 03 Dec 2003 15:23:39 +0100 +From: pablo neira +To: netfilter-devel@lists.netfilter.org +Subject: sending event to user space + +Hi list! + +I programmed a dummy module for netfilter which tries to match a packet and if it does, it will do nothing (NF_ACCEPT) but I would want it to send an event to a program in user space to do something, how can I do that? + +So something like: + +a) packet gets my hook and do NF_ACCEPT. +b) modules sends an event to user space. +c) program in user space does something. + +Thanks! +Pablo + +P.S: thanks for this *great piece of code*!! +---- + + +== Pablo (fast forward four years) + +---- +Date: Thu, 15 Feb 2007 14:02:03 +0900 (JST) +From: Yasuyuki KOZAKAI +Subject: [ANNOUNCE]: New Coreteam Member Pablo Neira Ayuso + +The Netfilter Core Team is proud to announce the addition of Pablo Neira Ayuso as a new member. + +He has repeatedly demonstrated high insight and coding standards, and has already been responsible for several parts of the codebase, especially ctnetlink, conntrack and conntrackd. + +By joining the Core Team, Pablo will definitely help advance the development of the Netfilter project to a higher level. + +Welcome Pablo! + +Yasuyuki, +on behalf of the Netfilter Core Team. +---- + +== Pablo (2009) + +image:pablo-2009.jpg[width="60%"] + +== Harald (2006) + +As I'm showing various old pictures of other people, for fairness' sake... + +image:harald-2006.jpg[width="30%"] + + + +== bugs + +---- +Date: Mon, 14 Jan 2002 22:33:16 +1100 +From: Rusty Russell +To: "David S. Miller" +Subject: Re: Kernel 2.4.16: NetFilter Bug Report + +In message <20020113.231425.73653921.davem@redhat.com> you write: +> Any ideas on that NAT timer one from cat@zip.com.au? I've for now asked Marcelo to revert that 2.4.17 change until a different fix is obtained. + +I am a fucking retard. + +I was looking at what was wrong with the code, and came up with *five* separate problems. I know the compat layer was a hack, but what the *fuck* was I doing? + +Read and weep, +Rusty. +-- + Anyone who quotes me in their sig is an idiot. -- Rusty Russell. +---- + +== nfsim / testsuite + +Big problem with lots of code, including netfilter: Lack of automatic testing. + +Rusty returns to netfilter with _nfsim_, a netfilter simulator, co-authored with Jeremy Kerr. + +* nfsim runs netfilter kernel code in userspace against test suite +* emulates kernel environment in userspace +* imports netfilter kernel code + builds it in userspace +* {get,set}sockopt() wrapper for userspace tools +* can simulate allocation failures +* manual control over time (important for conntrack state tables) + +=> Great Idea, and lots of useful work + + +== nfsim / testsuite + +Reality sucks: + +* very few contributions +* very few users beyond Rusty + Jeremy +* very limited adoption/use by netfilter developers + +== nfsim / testsuite + +---- +Date: Tue, 31 May 2005 23:48:24 +1000 +From: Rusty Russell +To: Patrick McHardy + +On Tue, 2005-05-31 at 15:02 +0200, Patrick McHardy wrote: +> Second of all, I spent like 10 hours to verify the +> proposed fixes, and I am still convinced that it is correct. + +Which shows exactly *why* we have a testsuite. Dammit, I didn't spend +all those hours on it for fun. + +You spent *10* hours, and the testsuite runs in 5 seconds (60 seconds +counting build time the first time). + + +---- + +== nfsim / testsuite + +Reality sucks: + +* patches get validated only in test suite, not real kernel + +== nfsim / testsuite + +---- +Date: Sun, 23 Jan 2005 20:15:17 -0800 +From: "David S. Miller" +Subject: Re: [PATCH 3/2] Fix compile with NAT but without modules + +On Mon, 24 Jan 2005 01:33:47 +0100 Patrick McHardy wrote: + +> I'll apply your patches and push them to Dave tomorrow, bkbkits.com +> is unreachable currently so I can't resync my tree. + +To be frank, this is one of several severe fallouts from Rusty's patches. I really think they were not ready for submission when he sent them to me. It even broke the build if you had modules enabled in any +way. + +I'm only mentioning this because it appears that nfsim is becomming partially a crutch, because I know this is what Rusty and others use heavily for testing. Which is fine, but if your patches break the build in many ways in the real kernel tree you're relying too heavily on the userland simulator IMHO. +---- + +== nfsim / testsuite + +Reality sucks: + +* very few contributions +* very limited adoption/use by netfilter developers +* bit-rot of kernel environment simulation +* constant lag in terms of completeness +** no netlink simulation, i.e. no nfnetlink/ctnetlink/nf_queue/nf_log + +=> no replacement / successor, till today :( + + +== nfsim / testuite + +So all we can do is join DaveM and pray for code correctness + +image:davem-praying-zoom.png[] + + + +== humor + +---- +Date: Wed, 26 Feb 2003 11:54:59 +1100 +From: Rusty Russell +To: Jozsef Kadlecsik +Subject: [netfilter-core] Re: conntrack patches + +> Hi Rusty, +> +> Last year I started to go trough all of your unpublished conntrack related +> patches. [...] + +> Are you working on the patches or plan to finish them? +> Or can I go back and complete the half-done job on the patches? + +Jozsef, + Let me put it this way: take over those patches and I will name my first child after you. + +How many beers did I owe you now? +Rusty. +---- + + +== Harald and IPv6 NAT + +---- +Date: Thu, 20 Nov 2003 14:40:42 +0100 +From: Harald Welte +Cc: netfilter-devel@lists.netfilter.org +Subject: Re: NAT for IPv6 + +On Wed, Nov 19, 2003 at 01:38:47PM +0100, Maciej Soltysiak wrote: +> out of curiousity - are there plans to incorporate NAT into ip6tables +> or future pkttables ? + +over my dead body. NAT is what broke ipv4 end-to-end. Let's not do the +same with ipv6. + +The only reasonable application is ipv4-to-ipv6 transition-nat. + +-- +- Harald Welte http://www.netfilter.org/ +============================================================================ + "Fragmentation is like classful addressing -- an interesting early + architectural error that shows how much experimentation was going + on while IP was being designed." -- Paul Vixie +---- + + + +== nftables (2009) + +---- +Date: Wed, 18 Mar 2009 05:29:42 +0100 +From: Patrick McHardy +To: Netfilter Development Mailinglist +CC: Linux Netdev List +Subject: [ANNOUNCE]: First release of nftables + +Finally, with a lot of delay, I've just released the first full public +version of my nftables code (including userspace), which is intended to +become a successor to iptables. Its written from scratch and there are +numerous differences to iptables in both features and design, so I'll +start with a brief overview. + +There are three main components: + +- the kernel implementation +- libnl netlink communication +- nftables userspace frontend +---- + +== nftables (2013) + +In 2013, nftables goes mainline! + +---- +commit 96518518cc417bb0a8c80b9fb736202e28acdf96 +Author: Patrick McHardy +Date: Mon Oct 14 11:00:02 2013 +0200 +---- + +image:pablo-iptables-bye-zoom.png[] + + + + + +== netfilter Workshops + +* 1998/1999/2000: Informal meetings of some of the people involved +** like James + Marc + Rusty at Sydney Linux Expo +** like Harald + Rusty at Linux Beer Hike +* _workshop_ established from 2001 onwards to get developers meet up +* not every year, but almost: 13 workshops in 18 years +* invitation-only +* organization done by community for community +* sponsors typically among commercial netfilter users + +== netfilter Workshops + + +* 2001: Enschede, Netherlands +* 2003: Budapest, Hungary +* 2004: Erlangen, Germany +* 2005: Seville, Spain +* 2007: Karlsruhe, Germany +* 2008: Paris, France +* 2010: Seville, Spain +* 2011: Freiburg im Breisgau, Germany +* 2013: Copenhagen, Denmark +* 2014: Montpellier, France +* 2015: Budapest, Hungary +* 2016: Amsterdam, Netherlands +* 2017: Faro, Portugal + +== Workshop 2003: Group Picture + +image:nfws2003_group.png[] + +== Workshop 2005: Fun fact + +image:unix-extinguisher-2005.jpg[] + +== Workshop 2013 + +image:nfws2013.jpg[width="100%"] + +== Workshop 2014 + +image:nfws2014.jpg[width="100%"] + +== Workshop 2015 + +image:nfws2015.jpg[width="100%"] + +== Workshop 2016 + +image:nfws2016.jpg[width="100%"] + + + + + + + +== Thanks + +* to the audience, for bearing with me +* to the netdev 2.2 committee, for inviting me +* to Rusty, for being my hero +* to Pablo, for picking up the pieces when I left +* to Dave, for being everyone's hero +* to regit, for group (and other) pictures +* to every single netfilter contributor out there + +== EOF + +End of File diff --git a/2017/netfilter-netdev2.2/netfilter-scoreboard-20020408.png b/2017/netfilter-netdev2.2/netfilter-scoreboard-20020408.png new file mode 100644 index 0000000..e8ed4c3 Binary files /dev/null and b/2017/netfilter-netdev2.2/netfilter-scoreboard-20020408.png differ diff --git a/2017/netfilter-netdev2.2/netfilter-scoreboard-andras.png b/2017/netfilter-netdev2.2/netfilter-scoreboard-andras.png new file mode 100644 index 0000000..69e7d8f Binary files /dev/null and b/2017/netfilter-netdev2.2/netfilter-scoreboard-andras.png differ diff --git a/2017/netfilter-netdev2.2/nfws2003_group.png b/2017/netfilter-netdev2.2/nfws2003_group.png new file mode 100644 index 0000000..e94cf07 Binary files /dev/null and b/2017/netfilter-netdev2.2/nfws2003_group.png differ diff --git a/2017/netfilter-netdev2.2/nfws2013.jpg b/2017/netfilter-netdev2.2/nfws2013.jpg new file mode 100644 index 0000000..2d15238 Binary files /dev/null and b/2017/netfilter-netdev2.2/nfws2013.jpg differ diff --git a/2017/netfilter-netdev2.2/nfws2014.jpg b/2017/netfilter-netdev2.2/nfws2014.jpg new file mode 100644 index 0000000..87fff69 Binary files /dev/null and b/2017/netfilter-netdev2.2/nfws2014.jpg differ diff --git a/2017/netfilter-netdev2.2/nfws2015.jpg b/2017/netfilter-netdev2.2/nfws2015.jpg new file mode 100644 index 0000000..068b046 Binary files /dev/null and b/2017/netfilter-netdev2.2/nfws2015.jpg differ diff --git a/2017/netfilter-netdev2.2/nfws2016.jpg b/2017/netfilter-netdev2.2/nfws2016.jpg new file mode 100644 index 0000000..62b8d74 Binary files /dev/null and b/2017/netfilter-netdev2.2/nfws2016.jpg differ diff --git a/2017/netfilter-netdev2.2/pablo-2009.jpg b/2017/netfilter-netdev2.2/pablo-2009.jpg new file mode 100644 index 0000000..98b16af Binary files /dev/null and b/2017/netfilter-netdev2.2/pablo-2009.jpg differ diff --git a/2017/netfilter-netdev2.2/pablo-iptables-bye-zoom.png b/2017/netfilter-netdev2.2/pablo-iptables-bye-zoom.png new file mode 100644 index 0000000..8c3e685 Binary files /dev/null and b/2017/netfilter-netdev2.2/pablo-iptables-bye-zoom.png differ diff --git a/2017/netfilter-netdev2.2/rusty2000.jpg b/2017/netfilter-netdev2.2/rusty2000.jpg new file mode 100644 index 0000000..aa308b8 Binary files /dev/null and b/2017/netfilter-netdev2.2/rusty2000.jpg differ diff --git a/2017/netfilter-netdev2.2/unix-extinguisher-2005.jpg b/2017/netfilter-netdev2.2/unix-extinguisher-2005.jpg new file mode 100644 index 0000000..3624297 Binary files /dev/null and b/2017/netfilter-netdev2.2/unix-extinguisher-2005.jpg differ diff --git a/2017/netfilter-netdev2.2/video-not-available-youtube-error.png b/2017/netfilter-netdev2.2/video-not-available-youtube-error.png new file mode 100644 index 0000000..686c52d Binary files /dev/null and b/2017/netfilter-netdev2.2/video-not-available-youtube-error.png differ -- cgit v1.2.3