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DG--
22-11-2008, 16:52
Hi

I seem to be having problems accessing some websites, no real pattern as far as I can see

The reason I say routing problems is, these websites are not down for other people and in fact, if I use a proxy service like youhide.com for example, the webpage loads ok, and various online DNS tools suggest the websites are fine

One example would be, www.parkers.co.uk, though there are quite a few others. Almost say 1/3 of websites I'm trying to go to

Here is my tracert;

C:\>tracert www.parkers.co.uk

Tracing route to www.parkers.co.uk [217.64.236.73]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms 192.168.1.1
2 10 ms 8 ms 9 ms 10.93.56.1
3 13 ms 9 ms 10 ms 62.31.32.40
4 10 ms 14 ms 23 ms win-bb-b-ge-230-0.network.virginmedia.net [195.182.178.141]
5 11 ms 10 ms 14 ms gfd-bb-a-so-120-0.network.virginmedia.net [212.43.162.205]
6 * * * Request timed out.
7 * * * Request timed out.
8 * * * Request timed out.
9 * * 41 ms l120-hea-rc3.uk.attenda.net [217.64.228.3]
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 *

Axegrinder
22-11-2008, 17:07
I can access that website fine in Nottingham. Though though my tracert to the site is similar, after then 9th hop everything times out which suggests they are blocking ICMP packets.

DG--
22-11-2008, 17:11
Damn, this is crap

Had a browse through some similar threads here, and set a proxy of webcache.blueyonder.co.uk, and these sites started loading

Trouble is, one of them is a retail site, and whilst the pages are cached, obviously when I try to checkout it just fails

Fecks sake VM

CarrieB
22-11-2008, 23:01
Hi

I seem to be having problems accessing some websites, no real pattern as far as I can see

The reason I say routing problems is, these websites are not down for other people

That sounds very similar to the problems I'm having, the intermittent nature of the problem makes sorting it out very difficult. Does rebooting your modem bring the site back up for you?

DG--
23-11-2008, 09:22
No I tried that yesterday and still have issues with the same sites

jamiefrost
23-11-2008, 09:28
Have you tried a different DNS service like Open DNS to see if that helps?

JJ

caph
23-11-2008, 13:48
Have you tried a different DNS service like Open DNS to see if that helps?

The Parkers problem doesn't seem to be DNS related because tracert resolved it correctly (at least I'm assuming it resolved correctly because I get the same IP 217.64.236.73 and I can load the site OK) before it started tracing.

It looks like Parkers have their web hosting outsourced to Attenda (217.64.228.3) who are pretty big (they host www.microsoft.co.uk) and I would guess that you're not getting replies from inside their gateway because as has already been mentioned they probably block ICMP through their gateway.

I must say I'm intrigued how you seem to get through to Attenda on a trace route but can't load the Parkers website in IE. Are there any sites you can't get on that you can ping OK? Might be worth trying them in Firefox to eliminate any IE problem (I know, I know, I'm grasping at straws here!). Have you tried hard wired directly to the modem?

DG--
23-11-2008, 17:17
I think I eliminated DNS by playing around with iptools.com to make sure they were resolving ok, which they are

I can't ping any of the sites that are down, I'm using Opera and Chrome on this PC as well, and the results are the same

I keep Opera hard coded for that webcache.blue...... proxy now and just use that if sites don't load correctly.