Member Avatar for jojojooo

i am using a sony vaio laptop.. which supports wireless... my problem is, i just moved into my new place a day ago.. i am able to access the internet wirelessly.. and i can access some sites.. [like http://www.google.ca] but i realized that a lot of the normal sites i was able to access at home - i can no longer go into!
for example:
http://clubbox.co.kr
and when im checking my hotmail.. it doesn't always load - for my hotmail, it's an on and off problem
and not all images on my website is viewable. which is really weird!
i dont know what happened, i haven't changed anything or played around.. but once i got connected at my new place.. these sites were no longer available for me to view.. it just gives me the uhm. . cannot find server window "the page cannot be displayed"

hopefully any of you guys can help me out.. thanks a bunch!

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Dani AI

Generated

The symptoms described by — some sites load (Google) while others fail, images missing, and intermittent Hotmail — often point to a path‑MTU/fragmentation problem but can also be caused by DNS, proxy or local network stack issues. ’s MTU suggestion is a good direction; the checks below confirm MTU quickly and cover other common causes so a corrective step can be chosen with confidence.

Check name resolution and the route first:

nslookup clubbox.co.kr
tracert clubbox.co.kr

If DNS fails, try a public resolver (for testing only) by temporarily setting the adapter DNS to 8.8.8.8 or 1.1.1.1. If DNS is fine but connections stall after name resolution, test path MTU with Windows ping (DF set):

ping -f -l 1472 clubbox.co.kr

If that returns a fragmentation-needed message, reduce the payload size until the ping succeeds; add 28 bytes to the largest successful payload to estimate the MTU for that path. This identifies whether large packets are being dropped.

Other quick, non-invasive fixes to try before changing router/ISP settings:

ipconfig /flushdns
netsh int ip reset
netsh winsock reset

Also check Internet Options -> Connections -> LAN settings for an unwanted proxy, disable VPNs/third‑party firewalls temporarily, and try a different browser or safe/incognito mode.

Why this causes partial failures: path‑MTU discovery relies on ICMP "fragmentation needed" messages. If those ICMP messages are blocked by an intermediate device, large packets are dropped silently and some resources (large images, HTTPS connections) can hang while small pages still load. If lowering the local MTU fixes the issue, record the original value before changing anything permanently and contact the ISP or router vendor to correct the underlying path MTU problem.

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Member Avatar for Xpenetrator

This sounds pretty much like a MTU problem. If you have moved to another place, your MTU (Maximum Transmission Unit) may have changed, even if you still got the same ISP. Download Dr.TCP here:http://www.softpedia.com/progDownload/DrTCP-Download-32633.html and run it.
In the box in the lower right corner you can see your current MTU setting - note that number. Now enter a number that's 10 lower, i.e. 1484 becomes 1474. Click "Save" and reboot your computer. If this doesn't help, repeat the procedure a few times, each time with a setting that's 10 lower than the one before. If you end at 1400 and nothing helped, restore the original setting - then I was wrong.
If it helped, tell me and we can try to optimize your RWIN size for that new MTU setting.

Member Avatar for jojojooo

thanks a bunch! when im done some of my work. i will update with hopefully good news =)

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