Bug #125

So a ECN server blacklist perhaps isn’t quite the right thing. Moreover, ECN problems can be introduced by a device very close to the client. For such a client, essentially the entire Internet would have to be blacklisted. (This in fact was exactly the case at my lab before it was fixed.)

Now, perhaps your point is there are servers that have topologically close problems and those could reasonably be put on a global list so everyone doesn’t go negotiating an ECN connection that ends up broken. Could be fairly large list. But even here since ECN brokenness is a path issue, the blacklist might not be correct for some clients depending upon the network topology and the location of the problems.