Some websites not loading on my bsnl broadband

[vishalg]

i am facing a weird problem with my bsnl 750ul+ broadband connection

some 15 days back the bsnl shifted its servers to new ones in their exchange since then some sites do not load fully on my system (eg. live.in, mobile-review, yahoo mail) dropbox cannot upload files

now its gets more weirder that i can access all these websites fully through a proxy website!!!!!!!!!!!!!!!!

i have tried different dns servers(google & open dns) have tried diff. MTU values in the router but with no success

the bsnl guy says since my router (utstarcom WA3002-g1) is very old and they have updated to latest servers i need to change my perfectly working modem

HELP

[casual_gamer]

I was facing the same problem for over a year, the fix for me was to change mtu value in router to 1452 or 1456.

[Skud]

Even I am facing the same problem with both BSNL BB & EVDO. Browsing with Opera with Turbo on (ie proxy server) solves the problem.

[vishalg]

thanks for your input guys

@casual_gamer
tried every possible mtu value, but to success

@skud
opera turbo solves it to some extend, but not fully

isnt there a solution for this??

[casual_gamer]

from my experience if sites open through proxies like opera turbo and not through your real ip then the problem is either with the router or your ip series is banned by some websites due to hacking attempts, but i feel the latter is not true in your case.
even i thought the problem can't be with my router so i went to the exchange and they connected my phone line to their router and opened all the blocked websites in front of my eyes, i also confirmed the ip series 117.x.x.x, that's how i diagonised the problem. i hope your have saved the new mtu settings.

i will copy paste the method to find the perfect mtu value for your router,
General instruction for finding your optimal MTU size

Go to Start and select Run.
Set router to MTU 1500 to start with.
Start RUN
Type in cmd (Windows 2000/XP/Vista/7) or
command (Windows 98/ME) into the box .
Hit the enter key or click OK
At the DOS prompt,
type in ping bbc.co.uk -f -l 1492
and hit the Enter key.
If you get the response "Packet needs to be fragmented but DF set",
lower the size the packet in increments of +/-10 (e.g. 1472, 1462, 1440, 1400)
until you have a packet size that does not fragment.

Now increase the packet size from this number in small increments until you
find the largest size that does not fragment.

Add 28 to that number (IP/ICMP headers) to get the optimal MTU setting.
For example, if the largest packet size from ping tests is 1462, add 28 to
1462 to get a total of 1490 which is the optimal MTU setting and can be put
in your router's settings

[vishalg]

thanks
but i have already done the above procedure to find my optimal mtu value, and it comes out to be 1500 i.e 1472+28
at 1473 the packet begins to fragment

any other ideas?
it has really become a pain in the ass......

[thetechfreak]

well I guess there is nothing much you can do now since you have tried almost everything. so use it via opera turbo and proxy only

[kg11sgbg]

Originally Posted by vishalg

the bsnl guy says since my router (utstarcom WA3002-g1) is very old and they have updated to latest servers i need to change my perfectly working modem

@vishalg, I think the BSNL guy was very much correct.

In fact I changed the CRAPPY WA3002-g1(UTSTARCOM) modem provided by BSNL to me(using it since April 2007...though),and very recently purchased a D-Link
ADSL2+ (DSL-2520u) modem/router for Rs.1,000/-.

I was having similar problem as yours.
Life has changed absolutely...surfing,downloading had never been so easy.

My most severe problem has vanished.
Earlier with the WA3002-g1 modem, I was unable to enter into these sites:
Yahoo! Singapore
Newegg.com - Computer Parts, PC Components, Laptop Computers, LED LCD TV, Digital Cameras and more!
Cooler Master - Leading Provider of Computer Case | Cooler | Power Supply
Lenovo - Laptops, Notebooks, Netbooks, Desktops, Computers & Accessories - Singapore (SG)
Welcome to Indian Railway Passenger reservation Enquiry
Hard Drives | Seagate, with Google Chrome,Firefox or IE(all in their latest versions).
Exception was "opera"(11.6)(with Turbo enabled) which could open these sites.

But,now with D-Link modem/router, I could open and enter,browse into all the above mentioned web-sites/pages at ease with any of the web-browsers present.
NO PROBLEM ULTIMATELY.

[vishalg]

SOLVED IT FINALLY

the mtu value in windows was showing 1500 no matter what i entered in my router setting, so i used this command to set an mtu value of 1460 under windows
"netsh interface ipv4 set subinterface "Local Area Connection" mtu=1460 store=persistent"

After this both show 1460 and all sites work

[Skud]

Now how to do this with my EVDO modem?

[vishalg]

dont know anything about evdo modem bro

i typed the following command in dos to see the mtu value in windows
"netsh interface ipv4 show subinterfaces"

now the mtu value in windows which didnt match to the mtu value set in my router
so i changed both to 1460 (which i got from the ping test)

[gks.sharma]

Vishalg,

Thanks a lot man, i too faced the same problem and have the same modem, the changes that i made in the MTU values in windows resolved the issue...thanks , thanks a ton... have a good day...

Regards,
Gaurav