# ATT blocks 4chan **URL:** \ **Category:** NYSpeed Off Topic\ **Created:** [July 27, 2009, 6:39am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159 "2009-07-27T06:39:16Z")\ **Posts on this page:** 18\ **Page:** 1
**Author:** ![Geehee](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/geehee/32/7238_2.png) [@Geehee](https://forums.speedlife.net/u/Geehee)\ **Post date:** [July 27, 2009, 6:39am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/1 "2009-07-27T06:39:16Z")
Granted, they apparently already unblocked them, but I’m interested in seeing what they do in response… [http://news.google.com/news?pz=1&ned=us&hl=en&q=4chan](http://news.google.com/news?pz=1&ned=us&hl=en&q=4chan) ---
**Author:** ![boxxa](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/boxxa/32/5045_2.png) [@boxxa](https://forums.speedlife.net/u/boxxa)\ **Post date:** [July 27, 2009, 6:48am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/2 "2009-07-27T06:48:42Z")
Ya this exploded on twitter last night. I have been following 4chan4ever and seeing what unfolds. ---
**Author:** ![Geehee](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/geehee/32/7238_2.png) [@Geehee](https://forums.speedlife.net/u/Geehee)\ **Post date:** [July 27, 2009, 6:49am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/3 "2009-07-27T06:49:14Z")
same here. ---
**Author:** ![Locutus](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/locutus/32/7574_2.png) [@Locutus](https://forums.speedlife.net/u/Locutus)\ **Post date:** [July 27, 2009, 7:03am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/4 "2009-07-27T07:03:41Z")
what is 4chan? ---
**Author:** ![Smaefer](https://avatars.discourse-cdn.com/v4/letter/s/e79b87/32.png) [@Smaefer](https://forums.speedlife.net/u/Smaefer)\ **Post date:** [July 27, 2009, 7:09am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/5 "2009-07-27T07:09:08Z")
> [@Locutus](#): > > what is 4chan? X2 ---
**Author:** ![Joe](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/joe/32/7219_2.png) [@Joe](https://forums.speedlife.net/u/Joe)\ **Post date:** [July 27, 2009, 7:09am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/6 "2009-07-27T07:09:10Z")
> [@Locutus](#): > > what is 4chan? you’re fired ---
**Author:** ![Geehee](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/geehee/32/7238_2.png) [@Geehee](https://forums.speedlife.net/u/Geehee)\ **Post date:** [July 27, 2009, 7:11am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/7 "2009-07-27T07:11:14Z")
> [@Locutus](#): > > what is 4chan? > [@Joe](#): > > you’re fired seriously. ---
**Author:** ![newman](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/newman/32/7569_2.png) [@newman](https://forums.speedlife.net/u/newman)\ **Post date:** [July 27, 2009, 7:11am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/8 "2009-07-27T07:11:58Z")
knowing the crap that 4chan pulls they probably took the .img server offline themselves, then made a stink about it blaming AT&T, just to see what happens… ---
**Author:** ![newman](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/newman/32/7569_2.png) [@newman](https://forums.speedlife.net/u/newman)\ **Post date:** [July 27, 2009, 7:12am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/9 "2009-07-27T07:12:44Z")
also, there is no fucking way that locutus doesn’t know what 4chan is. Maybe this is a subtle hint that 4chan is about to be wiped away or something. ---
**Author:** ![Geehee](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/geehee/32/7238_2.png) [@Geehee](https://forums.speedlife.net/u/Geehee)\ **Post date:** [July 27, 2009, 7:19am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/10 "2009-07-27T07:19:07Z")
> [@newman](#): > > also, there is no fucking way that locutus doesn’t know what 4chan is. that’s what I’m thinkin ---
**Author:** ![boxxa](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/boxxa/32/5045_2.png) [@boxxa](https://forums.speedlife.net/u/boxxa)\ **Post date:** [July 27, 2009, 7:26am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/11 "2009-07-27T07:26:30Z")
**[4chan4ever](http://twitter.com/4chan4ever)** AT&T Seemingly ends blockade of [#4CHAN](http://twitter.com/search?q=%234CHAN), but the wound is deep. We’ll be sending out info later in the day, this is so not over ---
**Author:** ![Joe](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/joe/32/7219_2.png) [@Joe](https://forums.speedlife.net/u/Joe)\ **Post date:** [July 27, 2009, 7:31am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/12 "2009-07-27T07:31:45Z")
hey /b/ I need your help. I accidentally 93MB of .rar files what should I do…is this dangerous ? ---
**Author:** ![Locutus](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/locutus/32/7574_2.png) [@Locutus](https://forums.speedlife.net/u/Locutus)\ **Post date:** [July 27, 2009, 7:32am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/13 "2009-07-27T07:32:46Z")
> [@newman](#): > > also, there is no fucking way that locutus doesn’t know what 4chan is. > > Maybe this is a subtle hint that 4chan is about to be wiped away or something. > [@Geehee](#): > > that’s what I’m thinkin :snky: ---
**Author:** ![boxxa](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/boxxa/32/5045_2.png) [@boxxa](https://forums.speedlife.net/u/boxxa)\ **Post date:** [July 27, 2009, 7:35am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/14 "2009-07-27T07:35:31Z")
> [@newman](#): > > knowing the crap that 4chan pulls they probably took the .img server offline themselves, then made a stink about it blaming AT&T, just to see what happens… No. Look at this: [ImageShack - Best place for all of your image hosting and image sharing needs](http://img193.imageshack.us/img193/2523/1248672053880.png) This was an ACK attack, which causes problems not only for the directly attacked host, but for other users as well.Ordinarily, a TCP connection is set up when you send a SYN packet to a website, such as 4chan, and then 4chan responds with a ACK, and then you respond again with a SYN-ACK. Here is how an ACK attack works. I, the attacker, will send a SYN packet to 4chan, but I am pretending to be you, or your IP address. 4chan then sends an ACK packet to you, excepting a SYN-ACK in response. However, you did not initiate the connection, so you send a RST back to 4chan (or nothing at all, depending on your firewall settings). Then I do it again. And again. I effectively flood both you and 4chan with meaningless traffic. Your traffic problems are even worse, because if you have a firewall blocking the RST packets, then 4chan will send you 4 ACK packets (depending on configuration) for every SYN packet I send them. In this case, AT&T and other ISPs decided that the simplest solution to ending this DOS against their users was to block packets to and from 4chan (or a specific part of 4chan). Just the internet community jumped all over this and saying its a breach of privacy and information and all that so this is why its gonna get funny. ---
**Author:** ![Spam16v](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/spam16v/32/5287_2.png) [@Spam16v](https://forums.speedlife.net/u/Spam16v)\ **Post date:** [July 27, 2009, 8:44am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/15 "2009-07-27T08:44:24Z")
moar ---
**Author:** ![Joe](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/joe/32/7219_2.png) [@Joe](https://forums.speedlife.net/u/Joe)\ **Post date:** [July 27, 2009, 8:45am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/16 "2009-07-27T08:45:15Z")
sauce ---
**Author:** ![LZ1](https://avatars.discourse-cdn.com/v4/letter/l/7ab992/32.png) [@LZ1](https://forums.speedlife.net/u/LZ1)\ **Post date:** [July 27, 2009, 9:00am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/17 "2009-07-27T09:00:53Z")
> [@boxxa](#): > > No. > > Look at this: [ImageShack - Best place for all of your image hosting and image sharing needs](http://img193.imageshack.us/img193/2523/1248672053880.png) > > This was an ACK attack, which causes problems not only for the directly attacked host, but for other users as well.Ordinarily, a TCP connection is set up when you send a SYN packet to a website, such as 4chan, and then 4chan responds with a ACK, and then you respond again with a SYN-ACK. > Here is how an ACK attack works. I, the attacker, will send a SYN packet to 4chan, but I am pretending to be you, or your IP address. 4chan then sends an ACK packet to you, excepting a SYN-ACK in response. However, you did not initiate the connection, so you send a RST back to 4chan (or nothing at all, depending on your firewall settings). Then I do it again. And again. I effectively flood both you and 4chan with meaningless traffic. Your traffic problems are even worse, because if you have a firewall blocking the RST packets, then 4chan will send you 4 ACK packets (depending on configuration) for every SYN packet I send them. In this case, AT&T and other ISPs decided that the simplest solution to ending this DOS against their users was to block packets to and from 4chan (or a specific part of 4chan). > > Just the internet community jumped all over this and saying its a breach of privacy and information and all that so this is why its gonna get funny. SYN Cookies… ---
**Author:** ![Motocrossx23](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/motocrossx23/32/5120_2.png) [@Motocrossx23](https://forums.speedlife.net/u/Motocrossx23)\ **Post date:** [July 27, 2009, 9:15am UTC](https://forums.speedlife.net/t/att-blocks-4chan/71159/18 "2009-07-27T09:15:32Z")
> [@Locutus](#): > > what is 4chan? If you have to ask then you don’t want to know…