QnoS
We were plagued by incredibly slow and unreliable internet all weekend. Since we were only only sporadically it wasn’t until this morning that I called our provider to see what was going on. They took me through the usual drill which did not help.
This evening I started poking around my router settings, upgrading the firmware, etc. I discovered that QoS engine was enabled and promptly disabled it, rebooted the router and discovered that our problems went away.
I’m still baffled why this all of a sudden started to cause problems - perhaps it was tagging our packets and our provider recently started to pay attention (in a bad way)?