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Some sites not opening

This is a discussion on Some sites not opening within the BSNL broadband forums, part of the Broadband Internet Service Providers category; I am not able to access/open certain websites Connection - bsnl dataone ul750, Router/modem - Billion bipac 5200S, Mtu setting ...

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Old 09-17-08, 01:51 PM   #1
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Default Some sites not opening
I am not able to access/open certain websites

Connection - bsnl dataone ul750,
Router/modem - Billion bipac 5200S,
Mtu setting in Vista - 1455 (Current),
Dns - OpenDns,
I stay in Bangalore.

Before also i faced such problem, but by some help by the members, i was able to access all sites (which in know). Initially my mtu was 1492 or 1500. I used Tcp optimizer and changed mtu to 1454 and everything was normal. But yesterday again the same problem started, and i am not able to access these sites (there could be others as well)
microsoft.com
thepiratebay.org
yahoo.com
ubuntu.com
gmail.com

Bsnl gave me UtStarcom UT300R2U router wich initially worked correctly but later on also gave same problem and after some days it was not able to save the settings (username/password, etc) i.e whenever i did save/ save&reboot itwould reset all the settings so it became useless. Since from my previous tata connection i was having billion 5200S so i am using this. Other than the sites not opening issue, the outer is working correctly.

i have already tried these mtu settings, 1452, 1454, 1455*, 1492, 1500.
Google.com works with these mtu sett.
Using current i am able open cisco.com (before no)

I tried some testing on some websites with this program mturoute -
elifulkerson.com/projects/mturoute.php]mturoute.exe
And since i was getting 1455 as maximum mtu for most websites, so its 1455 now.
One more problem is i am not able to access many websites in Google Chrome which are working in firefox. Before, Chrome was perfectly on all sites.

Please help me...
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Old 09-17-08, 03:43 PM   #2
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In the modem settings, go to DNS settings and change to open DNS as follows:

Primary: 208.67.222.222
Secondary: 208.67.220.220
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Old 09-17-08, 03:49 PM   #3
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Even I was not able to open some sites like IBNLive, Gmail and yahoo. I tried yesterday night as well as today morning.
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Old 09-17-08, 03:50 PM   #4
 
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And also try this:

go to start > run > type in cmd and enter

now type in this:

ipconfig /flushdns

Then hit enter and now close the command window and try opening the sites mentioned above with the dns settings provided by Just4kix above

It should work

And dont forget to leave a comment here if it worked or otherwise
Last edited by Admin; 09-17-08 at 03:50 PM. Reason: Automerged Doublepost
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Old 09-17-08, 04:04 PM   #5
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Default Re: Some sites not opening
just4kix, I am already using OpenDns. And after posting the problem, i also changed my vista's mtu to 1454 using tcp optimizer. Admin as u suggested i flushed dns, but still it does'nt work. i am not able to open IBNLive as ensine said.
Atleast thanks everyone for replying and for help, since after almost 1 hour or so there were no replies! i don't know what to do now.
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Old 09-17-08, 04:19 PM   #6
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I am also facing this problem (I am from Bangalore). Yahoo and gmail loads only sometimes but is very slow. But some other sites like this forum is loading as usual. this problem started from yesterday night

update : Now all sites have started working fine for me as usual
Last edited by mtly; 09-17-08 at 04:19 PM. Reason: Automerged Doublepost
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Old 09-17-08, 04:22 PM   #7
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Quote:
Originally Posted by mtly View Post
I am also facing this problem (I am from Bangalore). Yahoo and gmail loads only sometimes but is very slow. But some other sites like this forum is loading as usual. this problem started from yesterday night
maybe bangalore connections have been affected. 2 of my friends also use bsnl, they are also facing same poblems.
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Old 09-17-08, 04:27 PM   #8
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me too facing the same problem but its fixed now
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Old 09-17-08, 04:31 PM   #9
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Okay now everthing is working alright. i did not do anything except flushing the dns and wandering around this website. maybe dns flushing worked out. it probably takes time. Or the problem rectified by bsnl. Anyway thanks everyone and specially Admin for flushing command. i have saved the command for later reference!
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Old 09-17-08, 04:40 PM   #10
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I don't think it was a dns problem. Flushing helps only if it is dns problem. I think there was some problem in some nodes in the internet network and they are now rectified.
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Old 09-18-08, 12:34 AM   #11
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I'm able to open sites without altering any settings.
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Old 09-18-08, 11:21 PM   #12
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it is not an all india prob

iam bsnl user in Trivandrum,Kerala


Ididnt hav any prob
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Old 09-23-08, 11:24 PM   #13
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ya my system also same problem what i do?
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Old 09-24-08, 08:30 PM   #14
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Quote:
Originally Posted by lokeshlksh View Post
ya my system also same problem what i do?
Clear your internet cache
Delete your cookies

n try again
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Old 09-25-08, 09:08 PM   #15
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Default hello
hello sir same problem
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Old 09-25-08, 09:23 PM   #16
 
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In dns setting enter first one as the dns provided by bsnl and second one an open dns ip.. This should solve this issue.
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Old 09-25-08, 10:45 PM   #17
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i dont no my proper ip and dns adresses pls tell me how will change
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Old 09-26-08, 01:37 PM   #18
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Sorry 4 da late reply. I assume windows Xp/Vista (2000?). if it hasn't been solved try clearing dns cache by using 'ipconfig /flushdns' command in cmd prompt, as Admin suggested. Type 'control netconnections' in run dialog, to get various connections you have, open 'Local Area Coonection' (name may differ), open up 'internet protocol version 4' dialog and select option 'use the following dns server addresses' and type both dns addresses here and click ok.

OpenDNS addresses are -
208.67.222.222
208.67.220.220

Instead of changing these settings in windows, use can change these settings in ur modem itself, so all operating systems would use those conf.
This is client-side only solution. But i think problem is with bsnl servers itself. Since, yesterday again same problem occured here but today net is working fine. Hope tht helps.
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Old 12-30-08, 04:24 PM   #19
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Default Same prob here too
most websites open....some youtube videos dont open......
none of my torrent(s) download ...
there some kind of mix-up in the IPs

//


help plz

how to clear out my cache .....will it also help me start downloading torrents again ????
Last edited by freakfrm_net; 12-30-08 at 04:24 PM. Reason: Automerged Doublepost
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Old 12-30-08, 05:07 PM   #20
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To clear cache run the following command from command prompt window:

ipconfig /flushdns
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