Very Very dodgy - anyone that says that just raises my suspicion even more.
On a bog standard consumer Cable/DSL/Router
There is NO SUCH THING. As I explained, a fair percentage of these are designed to a price, not to any standards save a scant wafting through of the RFCs. Indeed, there ARE NO STANDARDS for the innards of a cheap router save for the ones written by the production teams for the specific devices.
the NAT traversal is performed on the route through the WAN interface (Cable/DSL modem) as SAAB has pointed out, there is no requirement for NAT on either the WIFI or LAN ports - indeed it does not make any sense to do that in any situation where there is no reason to hide addresses from devices on the same network as it would just complicate issues.
I
KNOW it doesn't make sense. I'm not claiming for it to make sense. I'm claiming that i've seen it happen,
more than once.
What I believe you are claiming is that on some devices there is similar to a PIX firewall between the LAN and Wifi Segments - whilst this is a possible requirement when joining two disparete networks in a corporate environment it is not something a home consumer would require and would be very expensive to implement for a reasonable priced device as you would typically find at someones home.
A Cisco PIX is somewhat more expensive than the specific devices i'm talking about, and way beyond the means for 99%+ of the populace to deploy, short of taking a crash course in IOS configuration.
What i'm talking about here are the "hokey-cokey 2000" brand routers favoured by people who go to the local PC World-esque places to pick up something to do the job, not caring what brand it is. It is these types of items that I have seen where the wifi stack has been noted to sit in varying places amongst other things such as the code for the NAT and stateful firewall, dependent upon which release of the firmware you happen to be running on the box at the time, the type of boot of the device, the time of day and whether venus is rising in the east.
THAT is what i'm on about.
Never heard of a domestic household having custom built CPE to a price, especially when off the shelf devices are so cheap
Who said "custom"? this is "off the shelf" we're talking about here, and my comment is based upon the far east fab plants that knock out these devices, on production lines next to the ones for the well-known Linksys, Netgear, Cisco, Belkin, etc routers.
Please note - not all of us that post on these forums are just aviation nuts - some of us work in IT too, so please treat those professionals on here with the respect you would like to be treated with.
Well, hail fellow well met then! I am a director of an IT support company, with extensive in-depth experience of this specific topic which i'm trying to impart, and enough experience and relevant technical contacts that I would hope not to be summarily dismissed with such remarks as:
Elementary stuff, and exactly as GG specified in post#2
and
I think that this hole has been well and truly dug, and the sides reinforced! Enough squirming, let's draw a veil over this and move on.
...so I assume that respect should go both ways then?