topic Re: 4chan blocked? in Tech Help - Software/Hardware etc

4chan blocked?

jamc — Sat, 26 May 2012 16:03:00 GMT

I can't access 4chan.org, the page times out and I get the good old firefox "Problem loading page" Its been like this for a day or so.
I can access the site through a proxy and the site isn't having any problems, so does anyone know what could be the issue? are plusnet blocking me access to the site?
Thanks in advance.

Re: 4chan blocked?

Oldjim — Sat, 26 May 2012 16:34:16 GMT

very possibly because of reported child pornography
From Google

Quote
hc/ is 4chan's imageboard for the posting of tasteful hardcore ...

Re: 4chan blocked?

ejs — Sat, 26 May 2012 16:36:38 GMT

See these threads:
No access to forum
Do Some Gateways Block Certain Sites?
A workaround is to disconnect and reconnect from your router's web interface and hope you end up on one of the "pcl" gateways.
[tt]traceroute -T -p 80 4chan.org
traceroute to 4chan.org (141.101.124.244), 30 hops max, 60 byte packets
1 192.168.0.1 (192.168.0.1) 2.448 ms 3.253 ms 3.649 ms
2 lo0-central4.ptw-ag01.plus.net (195.166.130.109) 23.187 ms 24.975 ms 26.379 ms
3 84.93.253.99 (84.93.253.99) 30.201 ms 30.877 ms 32.530 ms
4 po4.ptw-gw01.plus.net (212.159.1.134) 76.705 ms 77.189 ms 78.542 ms
5 ae4.ptw-cr01.plus.net (195.166.129.36) 44.160 ms 44.987 ms 45.537 ms
6 te9-4.ptn-gw01.plus.net (195.166.129.33) 46.020 ms 20.603 ms 22.300 ms
7 tun0.ptn-gw01.plus.net (212.159.2.101) 24.051 ms 25.664 ms 27.570 ms
8 vl69.ptw-gw02.plus.net (212.159.3.253) 90.966 ms 48.523 ms 49.433 ms
9 po4.ptn-gw01.plus.net (212.159.1.138) 24.105 ms 26.451 ms 28.192 ms
10 tun0.ptn-gw01.plus.net (212.159.2.101) 29.898 ms 32.157 ms 34.391 ms
11 vl69.ptw-gw02.plus.net (212.159.3.253) 49.596 ms 50.053 ms 50.974 ms
12 po4.ptn-gw01.plus.net (212.159.1.138) 40.602 ms 37.172 ms 39.317 ms
13 tun0.ptn-gw01.plus.net (212.159.2.101) 40.521 ms 27.957 ms 26.845 ms
14 vl69.ptw-gw02.plus.net (212.159.3.253) 142.631 ms 141.464 ms 139.632 ms
15 po4.ptn-gw01.plus.net (212.159.1.138) 23.845 ms 19.921 ms 20.481 ms[/tt]

Re: 4chan blocked?

ejs — Sat, 26 May 2012 16:44:35 GMT

Alternative workaround: https://www.4chan.org/

Re: 4chan blocked?

jamc — Sat, 26 May 2012 17:17:19 GMT

Quote from: ejs
Alternative workaround: https://www.4chan.org/

This works! Thanks.
I reset the router but it didn't help, the page still wouldn't load.
So is plusnet blocking this site, or is just me?

Re: 4chan blocked?

Oldjim — Sat, 26 May 2012 17:23:21 GMT

It is probably being blocked by mistake otherwise the https version would be blocked as well
Running a tracert gives this but I still can't access it
Tracing route to 4chan.org [199.27.135.243]
over a maximum of 30 hops:
1 <1 ms <1 ms <1 ms 192.168.0.1
2 35 ms 32 ms 32 ms lo0-central2.ptw-ag02.plus.net [195.166.128.230]
3 33 ms 32 ms 32 ms gi1-14-221.ptw-gw01.plus.net [84.92.6.200]
4 32 ms 32 ms 32 ms ae4.ptw-cr01.plus.net [195.166.129.36]
5 31 ms 31 ms 33 ms te9-4.ptn-gw01.plus.net [195.166.129.33]
6 33 ms 32 ms 33 ms tun0.ptn-gw01.plus.net [212.159.2.101]
7 53 ms 32 ms 31 ms 195.99.126.144
8 43 ms 35 ms 34 ms core1-te0-3-0-12.ilford.ukcore.bt.net [109.159.254.125]
9 41 ms 35 ms 35 ms 62.172.103.189
10 87 ms 33 ms 32 ms mgre.customer.bt.net [194.72.9.2]
11 34 ms 33 ms 33 ms t2c3-xe-9-2-0.uk-eal.eu.bt.net [166.49.168.25]
12 33 ms 33 ms 33 ms t2c1-ge8-0-0.uk-eal.eu.bt.net [166.49.237.17]
13 33 ms 32 ms 33 ms t2c2-p3-0-1.uk-lon1.eu.bt.net [166.49.208.110]
14 34 ms 34 ms 33 ms t2a1-ge7-0-0.uk-lon1.eu.bt.net [166.49.135.49]
15 37 ms 35 ms 36 ms xe-3-0-0.cr1.lhr1.uk.nlayer.net [195.66.236.37]
16 33 ms 33 ms 33 ms ae2-70g.cr1.lhr1.uk.nlayer.net [69.22.139.62]
17 41 ms 41 ms 42 ms xe-0-0-0.cr1.cdg1.fr.nlayer.net [69.22.142.66]
18 42 ms 41 ms 42 ms as13335.xe-0-0-1-302.cr1.cdg1.fr.nlayer.net [63.141.223.18]
19 42 ms 44 ms 41 ms cf-199-27-135-243.cloudflare.com [199.27.135.243]
Trace complete.

Re: 4chan blocked?

jamc — Sat, 26 May 2012 17:30:44 GMT

Thanks for the help. Cloudflare could be having issues as 4chan have recently updated to a new html/css layout. I'm not knowledgeable in this area but could this be causing the issues?
jim:quote

Re: 4chan blocked?

dvorak — Sat, 26 May 2012 17:45:12 GMT

Quote from: Oldjim
very possibly because of reported child pornography

whilst 4chan is distasteful, the do not allow child pornography and is actively policed (about the only thing that is)

Re: 4chan blocked?

Pettitto — Sat, 26 May 2012 18:19:44 GMT

The original link to the site works fine for me as well as the https version.

Re: 4chan blocked?

jamc — Sat, 26 May 2012 19:01:52 GMT

Quote from: Chris
The original link to the site works fine for me as well as the https version.

Hmm... a few of us can't access the standard link but can the https
That is rather odd

Re: 4chan blocked?

ejs — Sat, 26 May 2012 19:04:45 GMT

Quote from: Oldjim
It is probably being blocked by mistake otherwise the https version would be blocked as well

Or the blocking is poorly designed. Or someone has decided to implement it strictly to the letter, so that if the list of stuff to block contains http://example.com/whatever then that's what they'll block, just that, not https://example.com/whatever nor http://example.com:8080/whatever etc.
If the IP address is on a list, IIRC then it is supposed to go to a second level of checks to examine the whole URL, but that's not really going to work with https because the URL and everything else is encrypted and can't be seen by something in the middle.
@Chris Pettit - have you read my earlier post - the only thing that's odd is that this problem keeps on re-occurring.

Re: 4chan blocked?

acidhorse — Sun, 27 May 2012 17:49:12 GMT

/b is down.
They have done some upgrades over the past couple weeks (infrastructure and new HTML5 enabled bits) not sure if that is related, but am sure moot is on it.

Re: 4chan blocked?

Chris — Mon, 28 May 2012 07:38:43 GMT

As has been mentioned it's most likely that the site has ended up on the IWF watch list (the traceroute earlier in the thread shows this too).
We'll get an internal problem raised to look at this shorty.

Re: 4chan blocked?

Bradley — Mon, 28 May 2012 19:27:47 GMT

Thanks, I've not been able to access the site without using Https:// for a couple of days now.
adie:quote

Re: 4chan blocked?

jhoughton1234 — Wed, 06 Jun 2012 20:40:48 GMT

Quote from: Chris
As has been mentioned it's most likely that the site has ended up on the IWF watch list (the traceroute earlier in the thread shows this too).

Out of interest, which entry in the traceroute shows this? I'm having trouble with another site that seems a likely candidate to have ended up on the IWF list (they host user-uploaded content and aren't very reactive at removing it if people complain), and would like to be able to check if this is the actual cause. If so, is there any way to disable the block? It really *shouldn't* be operating on a per-domain basis when only a very small minority of pages on these sites are likely to be offending.

Re: 4chan blocked?

bobpullen — Thu, 07 Jun 2012 12:29:12 GMT

Quote from: jhoughton1234
Quote from: Chris
As has been mentioned it's most likely that the site has ended up on the IWF watch list (the traceroute earlier in the thread shows this too).

Out of interest, which entry in the traceroute shows this?

It's the tun0 entry:

6    33 ms    32 ms    33 ms  tun0.ptn-gw01.plus.net [212.159.2.101]

Quote from: jhoughton1234
I'm having trouble with another site that seems a likely candidate to have ended up on the IWF list (they host user-uploaded content and aren't very reactive at removing it if people complain), and would like to be able to check if this is the actual cause.

What site?

Quote from: jhoughton1234
If so, is there any way to disable the block? It really *shouldn't* be operating on a per-domain basis when only a very small minority of pages on these sites are likely to be offending.

It's not supposed to. It's designed to work on a specific URL basis.
Anyway, we made some changes last night around 10.30pm so I'd be interested to know whether or not you're still having problems?

Re: 4chan blocked?

bobpullen — Wed, 13 Jun 2012 16:03:45 GMT

Update here.