Google wants to be your Internet

Joseph S D Yao jsdy at
Wed Jan 31 20:15:07 UTC 2007

On Tue, Jan 30, 2007 at 08:19:12AM -0000, michael.dillon at wrote:
> > > IPv6 makes NAT obsolete because IPv6 firewalls can provide all
> > > the useful features of IPv4 NAT without any of the downsides.
> > IPv6 firewalls?  Where?  Good ones?
> Why good ones. NAT is a basic IPv4 firewall. All IPv6 needs to obsolete
> NAT is a firewall that offers all the features of NAT without requiring
> the address translation. Then, instead of setting up a port translation
> for a particular incoming protocol, you simply open up that port without
> modifying the packets as they flow through. Suddenly, SIP works and
> incoming VoIP phonecalls work just like on the phone network.

There is more to firewalls than NAT and packet filtering, no matter what
the Cisco Pix people say.

Joe Yao
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