Re: [hybi] Last Call: <draft-ietf-hybi-thewebsocketprotocol-10.txt>

[Martin Rex <[e-mail]>]

Mark Andrews wrote:
> 
> Dave Cridland writes:
> > 
> > Happy eyeballs - try everything as soon as you can, in parallel. Drop  
> > everything else when one does.
> 
> More correctly it is try the first address and if that doesn't
> connect in a short period (150...250ms) start a second connection
> to the next address while continuing with the first.  If you have
> more that 2 address you do something similar for the next one (I
> use 1/2 the original timeout, but that is a implementation detail).
> You continue to use the address that works for that session.  You
> drop any other connections to other addresses that complete.

Happy eyeballs means that a clients reaction to congestion is
to perform an DoS attack, flood the network with additional
connection requests and hammer the server with many additional
half-open connections that will never actually get used.

While this might currently "improve" the end user experience
of clients, it simultaneously adds a deterrant to server operators
to announce IPv6 addresses (even multiple IP addresses -- they're
better of with IPv4 NAT if they have multiple servers at a single
location).

-Martin