Cannot access these sites!? Why?

Ashvon

Newbie
[OP]
Oct 28, 2005
6
0
Folks,
I have subscribed to 256kbps/unlimited download plan. Am happy with the speed (download/upload). However, have recently noticed that certain legal and legitimate sites are not able to load in IE-browser. No particular error message but...the page seems to be loading successfully forever -until you give up and close the website/broswer-window. Other websites entered in a different window load instantly.

Some of the websites where I have noticed problems and am unable to access are:
www.hotmail.com (Also, unable to sign-in to MSN-Messenger)
http://finance.yahoo.com/
www.marketwatch.com

My primary/secondary DNS-server IPs are set as recommended by Airtel. Any help or yr experience in accessing these sites will be very much appreciated.
Thanks-Ash
 

max

Regulars
Regulars
Oct 6, 2005
2,766
6
this did happen sometime with my old ISP. Never did find out why...
 


WiZaRd

l33T
Regulars
Oct 25, 2005
400
0
I think i know why.... i used to face the same problem a few months back.Try this : go to internet options > advanced n hit restore defaults.This should fix the problem, if it doesn't lemme know :)p.s the problem is that ie is not asking you to accept a certificate/or the warning message where it says the line is not secured or sumthing :phave you tried using any other browser ? like firefox or opera ....
 

blr_p

Regulars
Regulars
May 26, 2005
3,934
13
Originally posted by Ashvon@Nov 6 2005, 12:57 PM
Some of the websites where I have noticed problems and am unable to access are:
www.hotmail.com  (Also, unable to sign-in to MSN-Messenger)
http://finance.yahoo.com/
www.marketwatch.com

My primary/secondary DNS-server IPs are set as recommended by Airtel. Any help or yr experience in accessing these sites will be very much appreciated.
Thanks-Ash
[snapback]30833[/snapback]
[/quote]
I had this problem too when i first started with Airtel, they told me to decrease my MTU to 1470. The default is 1500. Now the web works fast...This MTU value was to match the exchanges they have in my area.

But i'm beginning to suspect it slows down my downloads since most servers out there will be set to 1500. I need to do more research in this area.
 

SiriusB

Torrential
Regulars
Jun 11, 2005
147
1
No blr_p, they are right. 1500bytes is the unit size across lans. Since you overhead for atm (and tcp?) is higher, tou have to compensate for them.
I have a method to find the optimim mtu. Type in
Code:
ping google.com -f -l 1452
and see. If the answer is 'DF is set' or something, you need to lower the last number. Else if the ping is successful, increase the number and try again. You will find a number that _just_ makes it through. This is the mtu for the path. For me 1452 was it.
Let me know if I have a flawed theory here.
 


vishalrao

The Global Village Idiot
Regulars
Jan 21, 2005
4,778
329
Pune
for me its just 1372... damn!(bsnl home 500 plan)edit:eek:ops, after some checking... 1464 works for mesteps:my modem MTU was 1400 above.i set the MTU on my modem to 5000 - it shows actual MTU as 1492... so set it back to 1492 then did the pings as above to get 1464...so now my modem has MTU 1492 and my Windows registry has it as 1464... is this good?
 

SiriusB

Torrential
Regulars
Jun 11, 2005
147
1
I checked the tweaks faq in that site and they give the extra piece of information that I forgot to add. The 145* value you get is for the raw ping packet. You need to add IP overhead of 28 bytes to get the max mtu.
Also check out this site.
 

waterloo_sunset

Regulars
Aug 26, 2005
907
37
New Delhi
1. Your Tweakable Settings:Receive Window (RWIN): 33396 Window Scaling: 0 Path MTU Discovery: ON RFC1323 Window Scaling: ON RFC1323 Time Stamping: ON Selective Acks: ON MSS requested: 1452 TTL:(less any hops behind firewall) 132 TTL remaining: 116 TOS/TOS subfield: 0 TOS/Flags: 2. Test 1016149 byte download Actual data bytes sent: 1030669Actual data packets: 711Max packet sent (MTU): 1492Max packet recd (MTU): 1492Retransmitted data packets: 10sacks you sent: 96pushed data pkts: 73data transmit time: 64.954 secsour max idletime: 1427.3 mstransfer rate: 6489 bytes/sectransfer rate: 51 kbits/secThis is not a speed test!transfer efficiency: 98% These were my results, now wt's my ideal MTU. Even i was getting 1464 with the google method.Also, is changing the MTU value in the router settings enough?...or are there some settings one needs to change in windows too?....And what is MRU?...anythin imp?