Access to the IPv4 net for IPv6-only systems, was: Re: WG Action: Conclusion of IP Version 6 (ipv6)

Wed Oct 3 07:24:37 UTC 2007

On 2-okt-2007, at 17:35, Daniel Senie wrote:

> So I'm sure you've explained to the firewall vendors they should be  
> selling proxy boxes instead, and they've listened to you. Sorry the  
> market has dictated solutions you don't like. Time to move on, and  
> stop fighting a battle that's been lost.

The type of firewalling you talk about only happens in less than 1%  
of the sites connected to the internet. As a rule, these firewalls  
break lots of legitimate stuff such as ECN, the window scale option,  
path MTU discovery, etc, etc. The people who use them are welcome to  
these problems; it would be ridiculous for the IETF to work around  
this intentional breakage.

As I said before, if you want to meddle in the middle, do it right  
and say you don't support this stuff rather than play coy during the  
setup phase and break sessions once they're established and start  
using the newer features. (Although I wouldn't exactly call RFCs 1191  
(1990) or 1323 (1992) "new".)