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Crookshanks

join:2008-02-04
Binghamton, NY

1 recommendation

reply to nanaki333

Re: vpn

IPSec encapsulated into UDP packets (e.g., for NAT pass-through) should work just fine regardless of how many layers of NAT there are.

Not that this move on AT&T's part isn't completely idiotic. It will break a number of different applications; file transfers via IM, IRC or any other service that depends on identd, various gaming applications, remote access into webcams/rdp/other products at home.

It will also degrade services like Skype that rely on at least one end of the connection not being behind NAT. Skype will work with both ends NAT'ed but it winds up routing through a third party that isn't behind NAT; this can have the effect of degrading the video/audio quality and even if it works is far from ideal.


Smith6612
Premium,MVM
join:2008-02-01
North Tonawanda, NY
kudos:25
Reviews:
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1 recommendation

Let's also not forget about game consoles. There are a ton of users out there and most of the game consoles complain if you're even behind one NAT. If Carrier grade NAT Goes into effect, expect a lot of trouble with people getting NAT3 on their devices and games not being able to work nicely. That community will certainly suffer as well from Carrier Grade NAT.

Also, piping a ton of people through a single IP address is going to also give website owners and gameserver owners a ton of grief. If there's a DDoS taking place, or if someone needs to get IP Banned there isn't a unique identifier. You wind up blocking the NAT with IP Ban which ultimately winds up blocking a ton of people. They'd have to create an easily avoided way of blocking abusers by means of CD Key Detection (if even possible for some games), account detection (again, if support is there) or nick detection (avoidable).


cdru
Go Colts
Premium,MVM
join:2003-05-14
Fort Wayne, IN
kudos:7

1 recommendation

said by Smith6612:

most of the game consoles complain if you're even behind one NAT.

Huh? I'd venture to guess that almost every game console is behind at least one level of NAT.

JTY

join:2004-05-29
Ellensburg, WA
Most (all) implement UPNP, so they just open the needed ports on your home router.


cdru
Go Colts
Premium,MVM
join:2003-05-14
Fort Wayne, IN
kudos:7
said by JTY:

Most (all) implement UPNP, so they just open the needed ports on your home router.

I'm well aware of UPnP. I was countering Smith6612's assertion that game consoles complain if you're even behind one NAT. Obviously there are solutions to work with the issue in those millions of cases...and those solutions that work for the residential router also can (but not necessarily will) work for ISP NATing devices.