Two particular sites that I can't access at all is css-tricks.com and jquery.com which are pretty crucial to me since I'm a web designer.
I talked with my ISP and we tried
- Using different browsers,
- Using various dns servers,
- Clearing the DNS cache
- Resetting the modem back to the factory settings,
- and finally was about the change MTU settings, which was not available under the router interface, they gave up and told me to try a different router if the problem persists.
Here is the problem, I don't have another one and I don't want to pay for it. Obviously this one(airties rt-211) is working but probably there's a misconfiguration.
Anyways, so I took the reins and after some googling I found out more about the MTU. So apparently, my MTU is set to 1500. Pinging css-tricks.com with a 1500b packet returns the following error:
Packet needs to be fragmented but DF set.
I tried my way down to 1472. At this point the error messages changes to:
Request timed out.
I tried much more lower values as well, but it times-out even with a 1kb packet.
I don't think there is a problem with ISP dns's either since I use the same ISP at work and I'm able to reach those sites.
I also did a tracert, but again, the request timed out after 16th hop.
Any ideas anyone?