How come I can't download anything ?

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imslp
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Re: How come I can't download anything ?

Postby imslp » Fri Jun 19, 2009 9:45 pm

Does your friend's IMSLP.INFO point to the same IP (216.47.112.4)?

Ancient Seagul
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Re: How come I can't download anything ?

Postby Ancient Seagul » Sat Jun 20, 2009 7:34 pm

Here's the trace from my friend's PC:

Tracing route to IMSLP.INFO [216.47.112.4]
over a maximum of 30 hops:

1 * * * Request timed out.
2 20 ms 19 ms 20 ms host-92-10-0-1.as43234.net [92.10.0.1]
3 21 ms 65 ms 19 ms 92.31.252.10
4 21 ms 21 ms 20 ms xe-10-2-0-scr002.log.as13285.net [78.144.2.129]

5 21 ms 21 ms 21 ms xe-3-2-0-0.lon10.ip.tiscali.net [77.67.64.5]
6 22 ms 23 ms 22 ms xe-8-3-0.lon20.ip.tiscali.net [89.149.185.237]
7 22 ms 22 ms 21 ms 213.200.78.238
8 78 ms 21 ms 20 ms ldn-bb2-link.telia.net [80.91.254.18]
9 98 ms 97 ms 97 ms ash-bb1-link.telia.net [80.91.251.209]
10 97 ms 98 ms 97 ms layer42-117816-ash-bb1.c.telia.net [213.248.88.1
70]
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out.
21 * * * Request timed out.
22 * * * Request timed out.
23 * * * Request timed out.
24 * * * Request timed out.
25 * * * Request timed out.
26 * * * Request timed out.
27 * * * Request timed out.
28 * * * Request timed out.
29 * * * Request timed out.
30 * * * Request timed out.

Trace complete.

Bunty
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Re: How come I can't download anything ?

Postby Bunty » Sat Jun 20, 2009 8:35 pm

I'm having the same problem with browsers failing to connect to the server on several scores despite having no problems in the past.

I've also just noticed that those scores failing are "http://imslp.info..." etc. files (e.g. "Overture to a Midsummer Night's Dream, Op.21 (Mendelssohn, Felix)" Transcription for 4 hands) while "http://imslp.org/..." (e.g. on the "Suite in A minor TWV 55:a6 (Telemann, Georg Philipp)" page) files are working.

I don't know if this is significant or helpful, don't understand the technicalities, but thought as it was a noticeable difference it might be worth mentioning.

Any advice of thoughts appreciated. Thanks.

imslp
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Re: How come I can't download anything ?

Postby imslp » Sat Jun 20, 2009 11:58 pm

Can you provide a traceroute Bounty? Also check out the four questions I asked in a post in the first page of this thread; it would be nice if you can answer them as it will help me greatly. But the traceroute is the most important I think.

The difference unfortunately does not explain the problem. Do you use AVG by any chance? It may be some bug in AVG that blocks something. Also try copying and pasting the IMSLP.INFO PDF file URL (*not* the IMSLP.ORG one) into a download manager (Flashget, etc) and try to download it that way. If that works, the problem is the browser or some firewall program (I think AVG has one built in, not sure though).

Ancient Seagul
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Re: How come I can't download anything ?

Postby Ancient Seagul » Sun Jun 21, 2009 1:29 pm

How do you extract the IMSLP.INFO url ? Every link on the website points to the .org domain

Bunty
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Re: How come I can't download anything ?

Postby Bunty » Sun Jun 21, 2009 1:53 pm

The IMSLP.INFO url appears to only be used on the actual scores (e.g. imslp.org....pdf) and only for some scores at that.

Questions:
1. I'm in the UK
2. Using Safari (also tired with IE7 but has the same problem)
3. Haven't got AVG I use Kaspersky. Windows Firewall is on but it would have been on when they worked in the past and Safari is on the exceptions list. (Just checked with Firewall off and still wouldn't work.)
4. Yes I'm using a router.

Flashget is having no luck, still on 0% after a good 20-30 minutes.

Here's the traceroute:

Tracing route to imslp.info [216.47.112.4]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms 192.168.2.1
2 31 ms 30 ms 30 ms lon-gs1dgw.spn.kcom.com [217.154.130.37]
3 30 ms 31 ms 32 ms ge-4-2.lon-gs1br.spn.kcom.com [213.254.191.1]
4 35 ms 34 ms 38 ms ge-1-2-0.414.ar2.LON3.gblx.net [67.17.212.173]
5 31 ms 33 ms 30 ms te9-3-10G.ar6.LON3.gblx.net [67.16.132.210]
6 31 ms 31 ms 30 ms ldn-b5-link.telia.net [213.248.91.37]
7 32 ms 32 ms 31 ms ldn-bb2-link.telia.net [80.91.252.209]
8 109 ms 105 ms 107 ms ash-bb1-link.telia.net [213.248.65.210]
9 106 ms 111 ms 107 ms layer42-117816-ash-bb1.c.telia.net [213.248.88.1
70]
10 * * * Request timed out.
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out.
21 * * * Request timed out.
22 * * * Request timed out.
23 * * * Request timed out.
24 * * * Request timed out.
25 * * * Request timed out.
26 * * * Request timed out.
27 * * * Request timed out.
28 * * * Request timed out.
29 * * * Request timed out.
30 * * * Request timed out.

Trace complete.

imslp
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Re: How come I can't download anything ?

Postby imslp » Sun Jun 21, 2009 3:10 pm

I think I figured out the problem.

The problem lies in the Telia backbone border router (213.248.88.170) malfunctioning and redirecting the packets to the wrong address (or the next router is down, which is also their problem). The reason Ancient Seagull's friend can download files is not because downloads actually work, but rather that he/she downloaded a recent submission (<1 day old) that have not yet made it onto the IMSLP.INFO mirror server (in which case the file is downloaded from the main server IMSLP.ORG). If AS downloaded the same file, it should work also. Bunty's observation of IMSLP.ORG vs. IMSLP.INFO was useful after all.

AS: The redirect chain ends in an IMSLP.INFO address if the file is on the mirror server, which all files older than 1 day are.

My suggestion is to contact TeliaSonera International Carrier's technical staff directly and ask them to investigate this incident. It is likely that this affects other sites as well. Just tell them that their border router 213.248.88.170 is redirecting packets heading for IMSLP.INFO to the wrong place, and that consequently you are not able to access the site. Maybe also tell them that since its an EU-to-US border router there is a high likelihood of this affecting other US sites as well.

You can even phone them in the UK: http://www.teliasoneraic.com/tsicWeb/ts ... t/begin.do I'm sure many people around the world will thank you for fixing a bug in the Internet backbone ;)

imslp
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Re: How come I can't download anything ?

Postby imslp » Mon Jun 22, 2009 1:28 pm

I've checked traceroutes from various places around the world, and I think I made a little mistake. The last hop (Telia's server) is not part of the backbone, but rather the last router before the server. I suppose that even though Telia is an EU company, IMSLP.INFO is actually hosted in their US subdivision. So it has nothing to do with TeliaSonera International Carrier. If you called already, I apologize ;)

That said, the problem is on Telia's side, but one that should be fixed already. All other traceroutes correctly go from the last Telia router to the destination, so if you try again it should work for you too. If it doesn't, tell me.

Ancient Seagul
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Re: How come I can't download anything ?

Postby Ancient Seagul » Mon Jun 22, 2009 3:47 pm

I still cant' DL anything.

I sent Telia an email - I didn't fancy talking to them over the phone in case they blew me away with tech-speak (my knowledge of packets and routers can be written on a postage stamp). They sent me the following response:

We are not aware of any issues within our backbobe at the moment that might cause an issue like this. I made a trace using our looking glass (http://looking-glass.telia.net/) and I can reach the site without any problems.

Router: London
Command: traceroute 216.47.112.4 as-number-lookup

traceroute to 216.47.112.4 (216.47.112.4), 30 hops max, 40 byte packets

1 ldn-bb2-link.telia.net (80.91.254.21) 16.355 ms ldn-bb2-link.telia.net (80.91.251.14) 0.432 ms ldn-bb1-link.telia.net (80.91.249.77) 0.311 ms
2 ash-bb1-link.telia.net (213.248.65.210) 80.315 ms ash-bb1-link.telia.net (213.248.65.98) 87.634 ms ash-bb1-link.telia.net (213.248.65.210) 75.945 ms
3 layer42-117816-ash-bb1.c.telia.net (213.248.88.170) 89.554 ms 76.093 ms 76.290 ms
4 imslp.info (216.47.112.4) [AS 8121] 76.125 ms 89.337 ms 75.978 ms

Please do not hesitate to contact our 24h/7d customer service centre if you have any further queries.

Kind regards,

Marcus Sjödin
Customer Care International
Phone +46 771 191170
Fax +46 8 750 5427
carrier-csc@teliasonera.com

imslp
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Re: How come I can't download anything ?

Postby imslp » Mon Jun 22, 2009 7:59 pm

Can your friend download one of the old files, say, IMSLP #00001?

drjazz
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Re: How come I can't download anything ?

Postby drjazz » Wed Jun 24, 2009 1:49 pm

I can't download anything either and I'm in the UK. Been happeneing for about 2 weeks now. Just get page cannot be displayed or it downloads a little bit then freezes computer.

briantrumpet
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Re: How come I can't download anything ?

Postby briantrumpet » Fri Jun 26, 2009 6:22 pm

I'm experiencing the same problem too - identical symptoms, also in the UK.

imslp
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Re: How come I can't download anything ?

Postby imslp » Sat Jun 27, 2009 4:29 pm

I have already contacted the administrator of the server in question two days ago. He promised that he will fix this soon. Unfortunately he didn't seem to have an instant recognition of where the problem is, so this problem might be a rather tricky one to fix. But we will see. The fact that almost everyone blocked is from the UK, yet not everyone in the UK is blocked makes it potentially complicated.

Also, please provide your IMSLP.INFO (not IMSLP.ORG) traceroute output if possible, as it will greatly help us in diagnosing the problem. In addition it would be helpful if you can tell us whether you are using any firewall software. If you do not know how to traceroute, Google "windows traceroute" and you should find the instructions.

mikeo_s
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Re: How come I can't download anything ?

Postby mikeo_s » Sat Jun 27, 2009 5:59 pm

I'm another UK user who has been having problems downloading anything over the past week (if not longer): I use Debian Lenny with its Firefox-equivalent (Iceweasel) and the connection keeps timing out, though I had been downloading successfully a few weeks ago.

Anyway, my traceroute output for imslp.info is as follows (and yes, the first IP address is the wireless router):

Code: Select all

traceroute to imslp.info (216.47.112.4), 30 hops max, 40 byte packets
 1  192.168.0.1 (192.168.0.1)  1.298 ms  2.194 ms *
 2  * * *
 3  * * *
 4  * * *
 5  * * *
 6  * xe-4-1-0.lon20.ip.tiscali.net (89.149.187.102)  20.439 ms  24.376 ms
 7  213.200.78.238 (213.200.78.238)  26.726 ms  29.135 ms *
 8  * * *
 9  * * *
10  * * *
11  * * *
12  * * *
13  * * *
14  * * *
15  * * *
16  * * *
17  * * *
18  * * *
19  * * *
20  * * *
21  * * *
22  * * *
23  * * *
24  * * *
25  * * *
26  * * *
27  * * *
28  * * *
29  * * *
30  * * *

Hope this helps ...

imslp
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Re: How come I can't download anything ?

Postby imslp » Sat Jun 27, 2009 7:55 pm

Just a note that if you are using the Linux "traceroute" command, please use ICMP to traceroute instead of the default (that's what the Windows tracert command uses). Anything else will be almost useless because the last few routers do not respond to TCP/UDP traceroute.

If you do not know how to use ICMP to traceroute, please check the man page. You may need root permissions for this command.


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