Microsoft sites, wolframalpha cannot be opened

I have a netgear DG834g v4 modem. My ISP is BSNL, India. I'm on a adsl 2+ connection which uses LLC based multipexing and PPOPE mode. I can conect to the internet but I cannot open any microsoft sites, wolframaplpha and some more sites. I tried tweaking MTU size, it did not work. Earlier I used to have a diiferent router for the same connection and I could open all the above mentioned sites. Here are my ping and tracert stats

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\ALLZ> tracert www.microsoft.com

Tracing route to lb1.www.ms.akadns.net [65.55.21.250]
over a maximum of 30 hops:

1 1 ms <1 ms <1 ms 192.168.0.1
2 26 ms 25 ms 25 ms 117.198.96.1
3 * * * Request timed out.
4 266 ms 263 ms * if-13-0.mcore5.LAA-LosAngeles.as6453.net [209.58
.33.45]
5 295 ms 295 ms 296 ms if-10-0-0-934.mcore4.PDI-PaloAlto.as6453.net [20
7.45.196.73]
6 317 ms * 317 ms ix-1-3.mcore4.PDI-PaloAlto.as6453.net [216.6.86.
38]
7 317 ms 317 ms 317 ms 209.240.198.195
8 334 ms * 334 ms ge-1-2-0-0.tuk-64cb-1b.ntwk.msn.net [207.46.47.3
9]
9 329 ms 328 ms 328 ms ge-1-0-0-0.co1-64c-1b.ntwk.msn.net [207.46.43.17
6]
10 333 ms 328 ms 332 ms ge-0-0-0-0.co1-64c-1a.ntwk.msn.net [207.46.43.16
0]
11 333 ms 333 ms * 10.22.8.2
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
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:\Documents and Settings\ALLZ> ping www.microsoft.com

Pinging lb1.www.ms.akadns.net [207.46.193.254] with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Request timed out.

Ping statistics for 207.46.193.254:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

C:\Documents and Settings\ALLZ> ping www.wolframalpha.com

Pinging www.wolframalpha.com [208.91.128.57] with 32 bytes of data:

Reply from 208.91.128.57: bytes=32 time=304ms TTL=51
Request timed out.
Reply from 208.91.128.57: bytes=32 time=306ms TTL=51
Reply from 208.91.128.57: bytes=32 time=304ms TTL=51

Ping statistics for 208.91.128.57:
Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
Approximate round trip times in milli-seconds:
Minimum = 304ms, Maximum = 306ms, Average = 304ms

C:\Documents and Settings\ALLZ> ping www.google.com

Pinging google.navigation.opendns.com [208.67.219.231] with 32 bytes of data:

Reply from 208.67.219.231: bytes=32 time=266ms TTL=51
Request timed out.
Reply from 208.67.219.231: bytes=32 time=265ms TTL=51
Reply from 208.67.219.231: bytes=32 time=267ms TTL=51

Ping statistics for 208.67.219.231:
Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
Approximate round trip times in milli-seconds:
Minimum = 265ms, Maximum = 267ms, Average = 266ms

C:\Documents and Settings\ALLZ> ping www.guardian.co.uk

Pinging www.guardian.co.uk [77.91.249.30] with 32 bytes of data:

Reply from 77.91.249.30: bytes=32 time=305ms TTL=48
Reply from 77.91.249.30: bytes=32 time=305ms TTL=48
Reply from 77.91.249.30: bytes=32 time=308ms TTL=47
Reply from 77.91.249.30: bytes=32 time=308ms TTL=47

Ping statistics for 77.91.249.30:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 305ms, Maximum = 308ms, Average = 306ms

In case no one else replies - my advice would be to ask your ISP.
See what they have to say...


If you swap back to your original router, does it still work?

In reply to a post by b4dger:

In case no one else replies - my advice would be to ask your ISP.

Probably get through to a UK call centre.

I was able to solve the problem. By googling I came to know that my ISP's MTU settings are 1454. When I changed my router MTU settings I could open all the sites I was having problem with. Thanks for attention you've paid to my post.