[e2e] Inappropriate TCP Resets Considered Harmful

[Sally Floyd]

Alex -

>  I whole-heartedly agree with the spirit of the draft.  I wonder about
>a particular suggestion, however:

>Hence, while I know of no particular proposed extension that this would
>break, I am loath to recommend the silent editing of packets in
>flight--this seems equally non-compliant.

I agree that it is problematic.  I just had a long discussion with
Mark Handley and Vern Paxson about this, and it is not obvious to
us collectively if there is a "right" way for a firewall to block
ECN usage but still allow non-ECN connectivity, if for some reason
a firewall wanted to do that.  I am going to drop that paragraph
from the draft, for now.

- Sally