I was working as usual when I suddenly cannot access the internet. Everybody else seems to have no problem with it. All my LAN access seems to not work either. I remember I got this case sometime ago and a reboot fixed it, but I have many work open on the desktop that I refuse to just give up this time.
Some diagnostic later, the result, strangely, was :
- ping works, both LAN and internet.
- Any access to any port anywhere fail. I can not even ssh to server in LAN that I usually able to access.
- Check the config, seems nothing wrong
- Turn it off, It works!
- Turn it on again, it still works ?!