nanog mailing list archives
Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space
From: Mark Newton <newton () internode com au>
Date: Tue, 10 Feb 2009 10:28:47 +1030
On 10/02/2009, at 10:17 AM, Owen DeLong wrote:
Sure, but at the end of the day a non-NAT firewall is just a special caseof NAT firewall where the "inside" and "outside" addresses happen to be the same.Uh, that's a pretty twisted view. I would say that NAT is a special additional capability of the firewall which mangles the address(es) in the packet. I would not regard passing the address unmangled as a "special case" of mangling.
You're passing a value judgement on NAT, using loaded terms like "mangling"
and "twisted". Fine, you don't like rewriting L3 addresses and L4 port numbers. Yep, I get that. Relevance?
In terms of implementing the code, sure, the result is about the same,but, the key point here is that there really isn't a benefit to having thatpacket mangling code in IPv6.
There is if you have a dual-stack device, your L4-and-above protocolsare the same under v4 and v6, and you don't want to reinvent the ALG wheel.
- mark --Mark Newton Email: newton () internode com au (W) Network Engineer Email: newton () atdot dotat org (H)
Internode Pty Ltd Desk: +61-8-82282999 "Network Man" - Anagram of "Mark Newton" Mobile: +61-416-202-223
Current thread:
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space, (continued)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space Ricky Beam (Feb 09)
- RE: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space Frank Bulk - iName.com (Feb 09)
- RE: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space TJ (Feb 10)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space Stephen Sprunk (Feb 07)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space Ricky Beam (Feb 09)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space Jack Bates (Feb 09)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space Owen DeLong (Feb 09)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space Stephen Sprunk (Feb 09)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space Mark Newton (Feb 09)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space Owen DeLong (Feb 09)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space Mark Newton (Feb 09)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space Jack Bates (Feb 09)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space Mark Newton (Feb 09)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space Jack Bates (Feb 09)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space Matthew Kaufman (Feb 09)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space Mark Andrews (Feb 09)
- RE: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space TJ (Feb 09)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space John Peach (Feb 09)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space Seth Mattinen (Feb 09)
- RE: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space TJ (Feb 09)
- Re: v6 & DSL / Cable modems [was: Private use of non-RFC1918 IP space Jack Bates (Feb 09)