Re: Plusnet 2Mbps connection

pmj wrote:
<snipped>
> All NAT does is to look at the IP Packets passing through it
> (both ways - in & out) & *Translate* your Internet IP Address (which
> is what the Modem or Router has) to the relevent *Internal* Network
> IP Address of the PC(s) - such as 192.168.x.x - that are Connecting
> through it, so that each of them can Access the Internet.
>
> The prob with things like M$ NetMeeting, which use the H.323 Protocol
> is that NetMeeting puts the *Internal* IP Address of the Machine
> that the Packets are coming from *inside* the Packets (in the "Data"
> part, as well as on the "packet Header".
>
> Most normal NAT things just Translate the IP Address(es) on the
> Packet *Header*, but they don't do anything to the IP Address(es)
> in the *Data* part of the Packets.
>
> So when the other Machine that the NetMeeting is Connecting to
> tries to Send the VoIP Packets back to the originating Machine,
> it tries to Send them to an *Internal* IP Address (such as
> 192.168.x.x) & so they never get through to the right Machine.
> (Internal IP Addresses are (by their very nature) not Routable
> (or accessible) over the Internet
>
So wouldn't it be possible to just switch off, disengage or bypass the NAT
F/W part of the unit when wishing to use Netmeeting - or isn't there such a
facility available? After all there would still be a perfectly adequate F/W
on the separate computers, wouldn't there?
--
Heard melodies are sweet, but those Unheard melodies are sweeter
flyingnun@xxxxxxxxxxxxx FN 2°°5 +, Mungo Brandybuck of Buckland


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