Like many people on these forums, since the patch of 21st May, I have been unable to play MWO because of persistent rubber-banding effects, massive jitter/latency spikes and packet loss. Nothing I tried in my computer (including the banal reinstallation, cache clearing, client repair tool, AV/firewall disabling) seemed to help. Support seemed to be groping around for a fix.
Following diagnosis and investigation, and a very helpful post from GateKeeper York (doff of the cap, sir), I looked at my router configuration.
I have a DrayTek Vigor 2700 and it has a Denial of Service (DoS) filter. This little feature looks for high rates of certain protocols and filters them if they are too high. The patch of 21st May has, apparently, increase the rate of UDP packets to the point where the DoS filter on the router has responded as if it were a denial of service attack. It does this by aggressive rate limiting, which has caused the packet loss and latency spikes in my case.
I have turned the USP DoS filter off on the router, rebooted it, and tried a game of MWO with total success. No more rubber-banding, latency back to normal.
==
DoS filters in hardware and software-based firewalls are quite common, and often turned on by default. If people are experiencing the kind of latency/PING/rubber-banding that I was - you might want to focus your investigation and time on your security hardware/software in your router or on your PC since this might be happening to you too.
I have only been able to play one successful game - and I will report back if the problem doesn't stop there - but this is very hopeful.
With luck, I will see you on the battlefield!
Edited by Dalziel Hasek Davion, 24 May 2013 - 05:53 AM.