mattpi

I was going to ring the ISP, but it seems that the problem has fixed itself anyway. Thanks for all your help, sorry it turned out to be a waste of time!

Sorry, I wasn't clear: the problem happens no matter which DNS servers I use. DNS lookups appear to be working; when I type the IP address given from the DNS lookup I can access the site in question via proxy but not access it otherwise.

Yes, although I set the DNS server directly through the router settings rather than through the network properties settings, which were on default.

OK - I switched DNS servers and flushed the DNS cache. I can access mymathforum.com now, but I still can't access some other sites (except via proxy, as always) so unfortunately the problem doesn't seem to be fixed.

The tracert went through exactly the same as before. I pinged it twice - the first time I got 25% packet loss, the second time I got 0% loss.

OK, that worked fine.

No luck, I'm afraid - neither seems to help.

Thanks for the reply - here is the output. Tracing route to jincheng.asmallorange.com [50.22.14.115] over a maximum of 30 hops: 1 2 ms 2 ms 2 ms 192.168.0.1 2 42 ms 31 ms 30 ms 217.32.96.250 3 30 ms 31 ms 30 ms 213.123.110.193 4 30 ms 31 ms 30 ms 217.41.167.10 5 100 ms 31 ms 30 ms 217.47.19.50 6 31 ms 30 ms 30 ms core1-pos4-1.sheffield.ukcore.bt.net [217.32.171 .181] 7 39 ms 38 ms 39 ms core1-pos0-14-5-0.ealing.ukcore.bt.net [62.172.1 03.109] 8 35 ms 34 ms 34 ms transit1-xe11-0-0.ealing.ukcore.bt.net [62.6.200 .110] 9 36 ms 37 ms 37 ms t2c3-xe-10-1-0.uk-eal.eu.bt.net [166.49.168.5] 10 37 ms 38 ms 37 ms t2c1-ge13-0-0.uk-eal.eu.bt.net [166.49.237.25] 11 113 ms 111 ms 112 ms t2c1-p4-0-0.us-ash.eu.bt.net [166.49.164.225] 12 * * * Request timed out. 13 * * * Request timed out. 14 147 ms 146 ms * ae13.bbr02.eq01.dal03.networklayer.com [173.192. 18.134] 15 145 ms 145 ms 145 ms ae5.dar02.sr01.dal05.networklayer.com [173.192.1 8.217] 16 156 ms 157 ms 156 ms po2.fcr01.sr01.dal05.networklayer.com [173.192.1 18.133] 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. C:\Windows\system32>ping www.mymathforum.com Pinging mymathforum.com [50.22.14.115] with 32 bytes of data: Request timed out. Request timed out. Request timed out. Request timed out. Ping statistics for 50.22.14.115: Packets: Sent = 4, Received = 0, Lost = 4 (100% loss), I have tried pinging a different problem site before, and got 50% loss, if that helps.

Here you go: Tracing route to mymathforum.com [50.22.14.115] over a maximum of 30 hops: 1 2 ms 2 ms 4 ms 192.168.0.1 2 31 ms 31 ms 33 ms 217.32.96.250 3 31 ms 30 ms 33 ms 213.123.110.193 4 30 ms 30 ms 30 ms 217.41.167.10 5 31 ms 29 ms 30 ms 217.47.19.50 6 31 ms 30 ms 30 ms core1-pos4-1.sheffield.ukcore.bt.net [217.32.171 .181] 7 38 ms 39 ms 40 ms core1-pos0-14-5-0.ealing.ukcore.bt.net [62.172.1 03.109] 8 35 ms 34 ms 34 ms transit1-xe11-0-0.ealing.ukcore.bt.net [62.6.200 .110] 9 37 ms 37 ms 38 ms t2c3-xe-10-1-0.uk-eal.eu.bt.net [166.49.168.5] 10 38 ms 37 ms 37 ms t2c1-ge13-0-0.uk-eal.eu.bt.net [166.49.237.25] 11 112 ms 111 ms 111 ms t2c1-p4-0-0.us-ash.eu.bt.net [166.49.164.225] 12 * * * Request timed out. 13 * * * Request timed out. 14 146 ms 163 ms 146 ms ae13.bbr02.eq01.dal03.networklayer.com [173.192. 18.134] 15 144 ms 145 ms 152 ms ae5.dar02.sr01.dal05.networklayer.com [173.192.1 8.217] 16 156 ms 162 ms 184 ms po2.fcr01.sr01.dal05.networklayer.com [173.192.1 18.133] 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.

Nothing in hosts seems relevant. Here is the log from a quick scan using MBAM: Malwarebytes' Anti-Malware 1.51.2.1300 www.malwarebytes.org Database version: 8065 Windows 6.1.7601 Service Pack 1 Internet Explorer 8.0.7601.17514 02/11/2011 01:05:15 mbam-log-2011-11-02 (01-05-15).txt Scan type: Quick scan Objects scanned: 178053 Time elapsed: 3 minute(s), 51 second(s) Memory Processes Infected: 0 Memory Modules Infected: 0 Registry Keys Infected: 0 Registry Values Infected: 0 Registry Data Items Infected: 0 Folders Infected: 0 Files Infected: 1 Memory Processes Infected: (No malicious items detected) Memory Modules Infected: (No malicious items detected) Registry Keys Infected: (No malicious items detected) Registry Values Infected: (No malicious items detected) Registry Data Items Infected: (No malicious items detected) Folders Infected: (No malicious items detected) Files Infected: c:\Users\Matt\AppData\Local\Temp\CSMECA0.tmp (Adware.RelevantKnowledge) -> Quarantined and deleted successfully.

Hi all Recently I have been afflicted by a rather strange and incredibly annoying problem with my internet connection. I am unable to connect to certain websites, with any browser, on any computer on my home network. I am able to access them only via a proxy. However, when I have tried to remedy the problem by resetting the router, I can usually access the problem sites, only for other sites to become unavailable. I have tried two different routers, with no change in this behaviour between the two. I have repeatedly flushed the DNS cache - indeed I do not think that this is a problem with DNS resolution, as I have tried both the automatic DNS servers from my ISP, and OpenDNS, and DNS lookups appear to be working normally with both; when I do a DNS lookup for a problem site and plug the IP address itself into the address bar, I can access the site on the proxy, but not without. Does anyone have any ideas as to what is going wrong?