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Windows 7: Getting yellow triangle over network icon. Some sites load, some don't

17 Jun 2012   #31
lakenz

Windows 7 Ultimate x64
 
 

UsernameIssues - Sorry, I followed the instructions wrong! I did it right and the results came back as expected using TheCyberMan's experiments:

Pinging facebook.com [69.171.242.11] with 1472 bytes of data
Packet needs to be fragmented but DF set.
Packet needs to be fragmented but DF set.
Packet needs to be fragmented but DF set.
Packet needs to be fragmented but DF set.

Ping statistics for 69.171.242.11:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

C:\Windows\system32>ping facebook.com -f -l 1464

Pinging facebook.com [69.171.229.11] with 1464 bytes of data
Packet needs to be fragmented but DF set.
Packet needs to be fragmented but DF set.
Packet needs to be fragmented but DF set.
Packet needs to be fragmented but DF set.

Ping statistics for 69.171.229.11:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),


My System SpecsSystem Spec
.
17 Jun 2012   #32
UsernameIssues

W7 Pro SP1 64bit
 
 

Those results are not as desired...
...so, keep lowering the MTU until you find one that works for you.
My System SpecsSystem Spec
17 Jun 2012   #33
lakenz

Windows 7 Ultimate x64
 
 

I lowered it to 1420. I couldn't go down to 1410, or up to 1430. I found that I got to 1423 MAX. I then did what it said and added 28 onto it and then set it.

Nothing changed.

Despite the fact it clearly connected effectively to 1423.

You were right about the MTU, but why didn't it work once I set it?
My System SpecsSystem Spec
.

17 Jun 2012   #34
UsernameIssues

W7 Pro SP1 64bit
 
 

In theory, since 1423 worked, values smaller than 1423 should also work. You might want to set your MTU really low (around 1200) and see if that lets you get to facebook. If that fails, then we will need to scratch our heads some more.
My System SpecsSystem Spec
17 Jun 2012   #35
lakenz

Windows 7 Ultimate x64
 
 

Okay, so I went crazy changing the MTU, changing it to many different values (even 500) and 1200 did pick it up, but it didn't work once I set it. Maybe I am setting it wrong? I am following the instructions properly for Wireless, and it says "OK." when done. And yes, my wireless connection is the same name as the one on the page. Hmm.
My System SpecsSystem Spec
18 Jun 2012   #36
UsernameIssues

W7 Pro SP1 64bit
 
 

If you run...
netsh interface ipv4 show subinterfaces
...in an elevated command prompt window - it will show you what the current MTU setting is.

I can only point to what others have tried - I don't have a PPPoE connection to play with... but my guess is that you have more than one issue. If the output of the netsh command above shows that you are using 1200 for your wireless network adapter... and if the ping to facebook works (ping facebook.com -f -l 1172), then consider the MTU part of the problem solved (for now).

[As an aside, what is the MTU set to on your desktop computer?]

You mentioned that you can get to the login page for facebook - but then no further. Is the login page using https? Are the pages that you cannot reach all using https?

Once you can no longer get to facebook - try pinging it. I'm wondering if something is happening to your DNS.

Maybe it is time for you to learn wireshark :-)
My System SpecsSystem Spec
18 Jun 2012   #37
lakenz

Windows 7 Ultimate x64
 
 

Here's the deal:

When I pinged facebook.com when it stopped connecting it did the same as if it would connect. D; I think the MTU part is fine, because when I ping it now it seems to respond.

facebook uses https. I am not sure about the log in page, but the rest do.

I can log in to facebook and view the news feed but no other pages work. Windows live hotmail doesn't go past the login page!

I am really stumped. D:
My System SpecsSystem Spec
18 Jun 2012   #38
doubled822

Windows 7 Ultimate x64, BackTrack Linux 5 R2, Windows XP
 
 

Quote   Quote: Originally Posted by lakenz View Post
TheCyberMan - I disconnect the PPPoE connection and try to load a page. The page loads with a splash screen from the service provider. However, the pages that don't load with the PPPoE still don't load without it. :/

UsernameIssues - I think the above statement confirms that it has little to do with the PPPoE. And plus, I did update my wireless to little avail.

doubled822 - Advanced:
802.11b Preamble (long and short)
AdHoc Mode (11b)
Network Address (Not Present)
Receive Buffers (256)
Scan Valid Interval (60)
Transmit Buffers (512)

Power management:
Checkbox; "Allow the computer to turn off this device to save power" is unchecked.
Try changing the Receive Buffers value to 512.
My System SpecsSystem Spec
18 Jun 2012   #39
TheCyberMan

Windows 7 Ultimate x64
 
 

Lakenz when you did the ping at 1423 did you get a screen like below and did you add the 28 byte header on to give you an actual mtu 1451 and that is what you should have set the mtu to although the mtu is normally an even number which is divisible by 8.

This my mtu setting i pinged 1464 and then added the 28 byte header on to give me an mtu of 1492 do you understand now.

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Windows\system32>ping facebook.com -f -l 1464

Pinging facebook.com [66.220.158.11] with 1464 bytes of data:
Reply from 66.220.158.11: bytes=1464 time=109ms TTL=242
Reply from 66.220.158.11: bytes=1464 time=107ms TTL=242
Reply from 66.220.158.11: bytes=1464 time=119ms TTL=242
Reply from 66.220.158.11: bytes=1464 time=114ms TTL=242

Ping statistics for 66.220.158.11:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 107ms, Maximum = 119ms, Average = 112ms

C:\Windows\system32>

The bytes will be 1423 in yours bearing in mind that it is usually a an even number divisble by 8.
My System SpecsSystem Spec
18 Jun 2012   #40
UsernameIssues

W7 Pro SP1 64bit
 
 

see if https pages are the issue
here is a simple one to test with https://lavabit.com/about.html
My System SpecsSystem Spec
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 Getting yellow triangle over network icon. Some sites load, some don't




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