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Problems access images in posts http://www.rcbroughton.co.uk/sudoku/forum/viewtopic.php?f=12&t=626 |
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Author: | Børge [ Tue Oct 13, 2009 7:32 pm ] |
Post subject: | Problems access images in posts |
HERE udosuk wrote: Also, don't know why but my browser can't display Afmob's images at all. Is my ISP's range of IP addresses being blacklisted by his image hosting site's server? My guess is the other way around, i.e. your ISP's server do not load from (blacklists) afmob's image hosting site's server IP address(es).Personally I find this strange. Another guess is that loading some stuff from afmob's image hosting site's server (Lycos Inc. in the US) to GB/AU takes to long, i.e. times out. I believe Lycos has their servers somewhere in the US. Connecting to Lycos from DE is initially pretty slow, but then speeds up. Try the URL http://www.lycos.com.au I sometimes experience similar problems when loading images from AU sites (eBay and DVD shops) to DE. Refreshing/reloading the URL normally helps. |
Author: | Afmob [ Tue Oct 13, 2009 9:07 pm ] |
Post subject: | |
I haven't heard complaints from other users who live far away like Ed or Andrew, so it seems to be internationally accessible. It probably isn't the fastest host but I can also store other things, so I have more control over it, so I'll keep the images there. By the way, my site also holds the large archive created by Ed which would have to be modified if we moved the images. Edit: If other users have problem viewing my images (and tried refreshing, ...), feel free to tell me. |
Author: | udosuk [ Tue Oct 13, 2009 9:19 pm ] |
Post subject: | Re: Problems access images in posts |
Thanks Mr. Anderson for helping. (Agent Smith after going to the local barber in one of the Matrix neighbourhoods. ) I can access "http://www.lycos.de/" and "http://lycos.de/" without any problem. But I can't access "http://mitglied.lycos.de/" at all ("the page cannot be displayed"). Guess you might be right - my ISP has backlisted the IP address of that domain for some reasons. Well that can't be helped. Afmob, I do realise I'm probably the only one experiencing access problems on your files at the moment, and totally understand your decision not to "move your files" (mind you, I never requested you to perform such drastic actions, but merely to provide extra mirrors of some of these Assassin pics using public image hosting sites - which won't cost you any website bandwidth but probably would cost a couple minutes of precious time). Luckily those files I'm missing are not of critical importance - I can do well with just saving the codes for puzzle solving purposes. |
Author: | Børge [ Tue Oct 13, 2009 9:21 pm ] |
Post subject: | Re: Problems access images in posts |
udosuk wrote: But I can't access "http://mitglied.lycos.de/" at all ("the page cannot be displayed"). On first attempt accessing it from within DE, I got a timeout.After refreshing I got it. "http://mitglied.lycos.de/" is redirected to "http://www.multimania.de/" |
Author: | udosuk [ Tue Oct 13, 2009 9:23 pm ] |
Post subject: | Re: Problems access images in posts |
Børge wrote: On first attempt accessing it from within DE, I got a timeout. After refreshing I got it. "http://mitglied.lycos.de/" is redirected to "http://www.multimania.de/" I've tried refreshing multiple times, no good at all. I can access "http://www.multimania.de/" pretty fine, but never "http://mitglied.lycos.de/", and it never gives me any redirection. I've been doing some IP/domain lookups, here are the results: http://www.multimania.de IP: 213.131.252.254 Host: 254.252.131.213.static.inetbone.net Country: Germany http://mitglied.lycos.de IP: 213.131.252.251 Host: 251.252.131.213.static.inetbone.net Country: Germany http://www.lycos.de, http://lycos.de IP: 209.202.254.14 Host: search.bo3.lycos.com Country: United States So I can access "213.131.252.254", but not "213.131.252.251", which is pretty strange because they very probably belong to the same network. So these are the provided URLs for the images: http://mitglied.lycos.de/ascever/Sudoku/a176.png http://mitglied.lycos.de/ascever/Sudoku/a176v15.png And even changing them to the following: http://213.131.252.251/ascever/Sudoku/a176.png http://213.131.252.251/ascever/Sudoku/a176v15.png I can't ever access any of those. So apparently it's not a problem with DNS. Any idea? |
Author: | Børge [ Tue Oct 13, 2009 9:24 pm ] |
Post subject: | Re: Problems access images in posts |
Unfortunately networking is not my IT special field at all. As within every profession, people also get specialized in one or more fields in IT. I have never had much hands on with networking, and actually no need since I have (and have always had) colleagues who are network specialist. I think it will be helpful to check the following:
If you are the only person accessing the forum from AU who has this problem, and only has it at home, I suggest you confront your ISP provider with this problem. I checked the same URLs you did using PING and NSLOOKUP in a DOS command window under WIndows XP Professional. For some URLs there seems to be different IP addresses for the HTTP services than for other services Substituting a URL with an IP address will however often not work, see below. "http://www.multimania.de": 213.131.252.238 udosuk wrote: So these are the provided URLs for the images: I have no problems accessing the two URLS.http://mitglied.lycos.de/ascever/Sudoku/a176.png http://mitglied.lycos.de/ascever/Sudoku/a176v15.png And even changing them to the following: http://213.131.252.251/ascever/Sudoku/a176.png http://213.131.252.251/ascever/Sudoku/a176v15.png I can't ever access any of those. So apparently it's not a problem with DNS. Attempting to access any of the "http://213.131.252.251/ascever/Sudoku/......" results in a "403 Forbidden 'You don't have permission to access /ascever/Sudoku/a176.png on this server.'". Using 209.202.254.14 instead 213.131.252.251 does not really make any big difference. A network expert told me the following, why substituting a URL with an IP address will often not work. In your case the complete URL is forwarded to a DNS server at your ISP. This DNS server looks up its known IP address for the URL and sends a bunch of IP packages to that IP address containing your request, including your original URL. The receiving part (in this case Lycos) very probably has a (front end) firewall (actually constructed of a bunch of servers [employing proxies]), which first checks if Lycos wants to talk with your ISP (the transmitting IP addresss) at all. The IP address your ISP's DNS server knows for a Lycos URL is certainly not the IP address of the server that eventually will process your request, but that of the firewall or even some other network equipment (router) sitting in front of the firewall. The same will be true for any other DNS server outside Lycos' network. If your request is not rejected by the Lycos firewall, it is allowed to pass. Either the firewall or some other server behind it (in a DMZ) will decompile your URL to ascertain which server will process your request and forward it to it, using this server's IP address, which is normally not known outside of Lycos' computer network. |
Author: | udosuk [ Tue Oct 13, 2009 9:35 pm ] |
Post subject: | Re: Problems access images in posts |
Thanks for the help, and I'm regreting about all the fuss created (but not apologising ). I guess at the end fo the day if I have some free time I might send a courtesy email to my ISP asking about that issue. Guess it's a more personal problem than general. |
Author: | Børge [ Wed Oct 14, 2009 8:20 pm ] |
Post subject: | Re: Problems access images in posts |
Please do not take this as I being a Microsoft advocate, but I have actually grown a bit fond of the SkyDrive they offer as part of a "live/passport account". The following features I really like:
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