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Thread ID: 99315 2009-04-27 10:20:00 I can't connect to a site when others can connect. MistyCat (11583) Press F1
Post ID Timestamp Content User
768951 2009-04-27 11:24:00 blam6

An interesting combination.

Ping:
C:\>ping goblinscomic.com
Pinging goblinscomic.com [2001:470:1:3a::13] with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Request timed out.
(and so on....)

But! I can connect with Internet Explorer. I haven't yet reinstalled Firefox. I'll do that now. If that works, then it looks like I have some Opera investigation to do.

By the way, I have just the Windows XP Firewall which hasn't changed any settings. My last security update included a Windows Defender within about the right timeframe to be significant. I'll do some checking with Opera and report back.

Thanks to all.
MistyCat (11583)
768952 2009-04-27 11:33:00 That is VERY weird...are you connected to a domain?

Pinging doesn't work but web access does? :illogical

Blam
Blam (54)
768953 2009-04-27 11:38:00 Try the ping command I put in the previous post - what happens. wainuitech (129)
768954 2009-04-27 12:26:00 Going by the title of the Post, can we assume that you have a LAN and other PC's on your LAN can connect OK ?

OR do you have a single, standalone PC going to a Modem .

Edited: and whats the OS ?

Single, standalone PC, XP S/P3 going to an internal dial-up Modem .
Recent Update to Windows Defender .


Something to try, open a command prompt and type in this ( exactly)

ping -f -l 1472 www . dslreports . com

More weirdness - I've posted two replies - they haven't shown up yet, but later posts from wainuitech and blam6 have shown up . This may not make it . . .

Here's some pings

Microsoft Windows XP [Version 5 . 1 . 2600]
(C) Copyright 1985-2001 Microsoft Corp .

C:\>ping -f -l 1472 www . dslreports . com

Pinging www . dslreports . com [209 . 123 . 109 . 175] 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 209 . 123 . 109 . 175:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

C:\>ping goblinscomic . com

Pinging goblinscomic . com [2001:470:1:3a::13] with 32 bytes of data:

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

Ping statistics for 2001:470:1:3a::13:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

C:\>ping pcworld . co . nz

Pinging pcworld . co . nz [210 . 48 . 100 . 25] with 32 bytes of data:

Reply from 210 . 48 . 100 . 25: bytes=32 time=150ms TTL=52
Reply from 210 . 48 . 100 . 25: bytes=32 time=156ms TTL=52
Reply from 210 . 48 . 100 . 25: bytes=32 time=140ms TTL=52
Reply from 210 . 48 . 100 . 25: bytes=32 time=140ms TTL=52

Ping statistics for 210 . 48 . 100 . 25:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 140ms, Maximum = 156ms, Average = 146ms

blam6
I'm on a standalone PC with dial-up .

Ping Keenspot - No
Ping PCWorld - Yes

goblinscomic . com with Opera - currently unavailable
goblinscomic . com with Internet explorer - no problem .

I'm puzzled and I'm blaming Opera (but I'm going to keep on using it . )
MistyCat (11583)
768955 2009-04-27 13:09:00 Try what it says here (www.dslreports.com) under What is MTU?

It looks like that Packet needs to be fragmented but DF set error means your ISP doesnt support that MTU

Youre not using some kind of proxy in opera are you?? Since it works in IE?
Speedy Gonzales (78)
768956 2009-04-27 14:20:00 Speedy Gonzales

Some food for thought there.
I'm going to do some thinking, reading and data gathering before I alter anything. :-)

I've looked quickly at:
www.windowsreference.com
support.microsoft.com
en.wikipedia.org(networking)

The Wikipedia article is interesting to me.

I tried a bit of empirical testing to find my MTU limits:

C:\>ping -f -l 1435 pcworld.co.nz
Pinging pcworld.co.nz [210.48.100.25] with 1435 bytes of data:
Reply from 210.48.100.25: bytes=1435 time=1326ms TTL=52
Ping statistics for 210.48.100.25:
Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
Approximate round trip times in milli-seconds:
Minimum = 1326ms, Maximum = 2565ms, Average = 1941ms

C:\>ping -f -l 1436 pcworld.co.nz
Pinging pcworld.co.nz [210.48.100.25] with 1436 bytes of data:
Reply from 210.48.100.25: bytes=1436 time=759ms TTL=52
Ping statistics for 210.48.100.25:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 759ms, Maximum = 3780ms, Average = 2041ms

C:\>ping -f -l 1437 pcworld.co.nz
Pinging pcworld.co.nz [210.48.100.25] with 1437 bytes of data:
Packet needs to be fragmented but DF set.
Ping statistics for 210.48.100.25:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

Note - a few bits snipped. Dial-up speed with about half a dozen pages downloading at the same time as my pings.

I'll report back after many hours. :-)

Thanks.
MistyCat (11583)
768957 2009-04-27 14:39:00 From Microsoft: (My Italics)

Error Message:
Packet needs to be fragmented but DF set .

Explanation:
The packet length is to big to be processed by the ping command .

User Action:
Turn off the Do Not Fragment flag by removing the -f option from the command line and then try again . You may try decreasing the packet size by using the -l option prior to disabling the Do Not Fragment flag .

That suggests:
ping -l 1437 -f pcworld . co . nz
rather than
ping -f -l 1437 pcworld . co . nz

. . . or maybe not . :-)
MistyCat (11583)
768958 2009-04-27 19:43:00 I'm on Voda/Ihug and it works for me this morning gary67 (56)
768959 2009-04-27 21:24:00 Just in case you haven't noticed MistyCat is on dialup.
:)
Trev (427)
768960 2009-04-27 22:31:00 Try what it says here (www.dslreports.com) under What is MTU?

It looks like that Packet needs to be fragmented but DF set error means your ISP doesnt support that MTU

Youre not using some kind of proxy in opera are you?? Since it works in IE? Thats exactly what I was looking at also :thumbs: - if you are on dial up the MTU may be to high - heres the examples /tests (www.dslreports.com) and figures for MTU.
wainuitech (129)
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