MTNL Certain Sites not opening

  • Thread starter Thread starter rajan
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@socrates
I am just confirming the DNS @rajan has used. Open DNS as you know is 208.67.220.220 and 208.67.222.222.
@stuge has recommended Open DNS or any other DNS may be these.
opendns:
203.67.222.222
203.67.220.220
Confusion here.

Sorry ,Instead of Writing "8" I wrote there "3" .nothing was going right for me in the morning :(
 
Regarding my low SNR margin, it used be around 30 before when I had the 256 Kbps plan. My woes started when i upgraded to the 2 Mbps plan. Firstly MTNL people changed the plan to 749NU(from 549NU), but did not upgrade the speed. It took weeks to get it upgraded. Then onwards my connection became very "delicate". For many days the connection would get disconnected within seconds of getting connected. Later I came to know this was due to the 'internal' phone wiring in my house, as the electricity and phone wires are too close in the internal wiring. To work around this I had to fix the splitter at the point where the telephone wire entered my house and take a direct ADSL like externally(without any joints) to the router. This whole process took around a month since initially for many days i was calling up mtnl helpline daily and they were just postponing the matter. Then something strange happened, as the summers approached the modem got disconnected as soon as the fan of the room where the computer is kept, was switch on. Someone told me that the electromagnetic waves of the speed regulator of the fan interfere with the external phone(data) wire in the room. This i found was correct since when I switched on the fan at full speed i.e. regulator not coming into play, the modem connection remained ok. And now this DNS problem, this was the fourth problem occuring since the speed was upgraded, on 256Kpbs speed i never had any major issues with MTNL and everything worked well. I guess MTNL people should upgrade the 'local loop' lines before upgrading the speed. PS. I have successfully 'forwarded' the ports for emule and azureus for D-Link 502T and UT-300R2U modems, if anybody needs the primer for the same I can post it.
 
Even ,I also got very low snr margin(around 10db Downstream) when my speed was upgraded ,but after I got my line changed since, then I have getting SNR b/w 20-23 db .
 
hi,i m facing the same problem.few sites not opening.i am novice at issues relating to modem and routers.So coudn't understand most of what was said above.After reading above i downloaded 'dr.tcp' and put the MTU value as 1400.Still the sites are not opening.I am modem UT-300R2U.Don't know how to change DNS or to see router details.plsss help.
 
same problem... for last 2 weeks.. tried tweaking MTU and used Open DNS.. didnt work... found 2 hidden dll viruss.. non delete-able by anti virus... reinstalled OS.. works fine!
 
/members/vj007/
To access modem settings if needed.
UT-300R2U ADSL MODEM MENU
1.Make a copy of all present settings, in case you need to restore your original working settings in the modem.
2. Start/Network/ Local Area Network Properties
Click TCP/IP
Properties.
Note present entries.
Obtain IP address automatically.
3. In DNS enter 208.67.220.220 and 208.67.222.222.
4. Run Dr TCP change ONLY MTU to 1492 and try.
Give feedback.
 
@essbebedid wat u said.things working fine now.thnx a lot.Its been a real headache for last 4-5 days.thanx a ton mate.I had been emailing the mtnl guys and they knew nothing that could work.thnx again.now done that ,can u tell me a bit about it,i mean i want to gather some knowledge of what does it mean to change the dns.does that mean i m using some different servers other than mtnl's?
 
@members/vj007/
did wat u said.things working fine now.thnx a lot
Think of dns like a zip code. If you don't put a zip code on your mail the post office doesn't know where to send it. Domains are the same way if they don't have the DNS the internet doesn't know what server to send your request to.
Open DNS forwards your data faster, most of the time ( used for all ISP's )
I too don't know anything , but try these things to improve the BB internet connection and later check up and learn little by little from the forum from contributers like @/members/motorazor143/ .

If you are studying to be a professional software engineer, these are all elementary matters.
 
I had mentioned in one of my posts that I was having a lot of broadband disconnection problems. I solved this issue and would like to share my experience with all of you. Keep the following points in mind to get good connectivity and SNR margins:-



[*]The broadband/telephone line that comes to your house, should have minimal joints and preferably should be an external wire(signals in an internal wire are affected by electrical signals from other wires).
[*]This line should go in the ADSL splitter and the ADSL output line should go directly to the modem/router.
[*]If the above two points are taken care of, under normal circumstances you will get a stable connection, if the connection is unstable there is a problem from the telephone exchange/server.
[*]Now connect the Phone output line of the ADSL splitter to the telephone connections in your house.
[*]If after connecting the phones(including cordless phones), you see your Broadband connection getting disconnected this means that there is some 'reverse signal' or defective telephone wiring which is adversely affecting the Broadband signals. In this case the "trick' lies in putting more than one ADSL splitter(microfilter) in the telephone line. This can be done in two ways:-

[*]Install an ADSL splitter before every telephone. ADSL splitters don't cost much(Rs. 40 a piece).
[*]Install an ADSL splitter to the telephone output line of the first ADSL splitter and the output of this second ADSL splitter is the line which you use to connect your home telephone lines(I tried this method and it worked well fro me). :thumbsup:
[/list]
[*]Also check the telephone jacks and all joints for dust/humidity etc., remember the ADSL signals are very weak so any minor hinderance would cause them to snap. Specially the people using 2 MBPS lines(when we had 256 kpbs connections these problems never surfaced).
[*]Happy surfing.
[/list]rajan punhani
 
Dont come to conclusions in such a haste.

After reading your post i found out that u have problem with your MTU setting.
As u said earlier u put MTU : 1400 and sites don't open.
As for broadband MTU should be 1500 for maximum efficiency but for MTNL the value is 1492 for smooth browsing and Downloading.
So i recommend you to put the value to 1492 and the TCP MSS value is generally 40 points below MTU so pt it 1452.
I am not sure if it will work but it has high chances in your case.

It worked for most of the people.
DNS change wont be so effective.
 
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