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Re: PHP socket and NAT [message #177175 is a reply to message #177173]

Fri, 24 February 2012 21:04

The Natural Philosoph
Messages: 993
Registered: September 2010

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Senior Member

Tim Streater wrote:
> In article <ji8aun$5et$2(at)news(dot)albasani(dot)net>,
> The Natural Philosopher <tnp(at)invalid(dot)invalid> wrote:
>
>> Tim Streater wrote:
>>> In article <ji82v9$jsa$2(at)news(dot)albasani(dot)net>,
>>> The Natural Philosopher <tnp(at)invalid(dot)invalid> wrote:
>>>> > M. Strobel wrote:
>>>> > Am 23.02.2012 17:03, schrieb SL:
>>>> >>> No they don't, the local network will not allow it. They will have
>>>> >>> different IP addresses.
>>>> >> Sorry, folks. When I say same IP, I mean the external IP.
>>>> >>
>>>> >> I am trying to add something to a chat application; a server is
>>>> involved >> here, eg user initiates connection to a chat server
>> (via >> internet), where >> the server routes the messages (I think
>> you gurus >> know what I mean).
>>>> >>
>>>> >> Thanks. >>
>>>> >>
>>>> > > In the case where the clients connect to the server, there is
>>>> absolutely no > problem
>>>> > with NAT, it is just transparent. The server responds to these >>
>> connections > like to
>>>> > any other. Remember: HTTP establishes a TCP connection, and here
>> the >> > endpoints (=
>>>> > sockets) are identified by ip-address and port number: IP address
>> in >> the IP > header,
>>>> > port number in the TCP header.
>>>> > > A problem with NAT is to start a connection from the internet
>> to a >> station > on the LAN
>>>> > through the NAT router. Many call this problem a security feature.
>>>> >
>>>> Probably because that is exactly what it is.
>>>>
>>>> All arising out of the perception that SEVERS need connections but
>>>> DESKTOPS only make them.
>>>>
>>>> Plus a global shortage of IP addresses...
>>>> Until v6 at any rate - not that you hear ISPs talking about that.
>>> You do, but *quietly*.
>>
>> There are not a few IPV6 machines out there.
>
> True, and the Europe-wide network we put together at my last job was all
> dual-stack. But trying to get native v6 connections from commodity IP
> providers such as COLT, Telia, Sprint, etc, was met with the equivalent
> of "Not much call for that round here, Squire!". Mind you that was in
> 2008 and earlier, it may have improved since then. The fact that the
> last /8 blocks have now been handed out may concentrate their minds a bit.
>
There's a lot of action on it..most new machines can handle the stack
and the rest of it..many but not all ISPs are routing it.

Its a bit like digital telly. When that started you had to get a sky
dish, then you COULD bolt a set top box on the side, now its de rigeur..

I would say we will all be IPv6 within 10 years except a few islands
behind NAT firewalls

> We'll need new ADSL routers or hopefully just firmware upgrades, though.
>

Not sure. I think a lot of DNS things will return IPV6 stuff
already..the core internet is offering it in parallel.

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[Message index]

		PHP socket and NAT By: SL on Thu, 23 February 2012 08:58
		Re: PHP socket and NAT By: Erwin Moller on Thu, 23 February 2012 10:32
		Re: PHP socket and NAT By: Captain Paralytic on Thu, 23 February 2012 10:41
		Re: PHP socket and NAT By: Erwin Moller on Thu, 23 February 2012 10:53
		Re: PHP socket and NAT By: Erwin Moller on Thu, 23 February 2012 10:52
		Re: PHP socket and NAT By: SL on Thu, 23 February 2012 13:04
		Re: PHP socket and NAT By: The Natural Philosoph on Thu, 23 February 2012 13:37
		Re: PHP socket and NAT By: The Natural Philosoph on Thu, 23 February 2012 11:40
		Re: PHP socket and NAT By: Jerry Stuckle on Thu, 23 February 2012 13:00
		Re: PHP socket and NAT By: SL on Thu, 23 February 2012 13:09
		Re: PHP socket and NAT By: Captain Paralytic on Thu, 23 February 2012 13:19
		Re: PHP socket and NAT By: The Natural Philosoph on Thu, 23 February 2012 13:53
		Re: PHP socket and NAT By: Captain Paralytic on Thu, 23 February 2012 14:25
		Re: PHP socket and NAT By: Michael Fesser on Thu, 23 February 2012 17:28
		Re: PHP socket and NAT By: The Natural Philosoph on Thu, 23 February 2012 20:42
		Re: PHP socket and NAT By: M. Strobel on Fri, 24 February 2012 10:58
		Re: PHP socket and NAT By: SL on Thu, 23 February 2012 16:03
		Re: PHP socket and NAT By: The Natural Philosoph on Thu, 23 February 2012 20:44
		Re: PHP socket and NAT By: M. Strobel on Fri, 24 February 2012 11:07
		Re: PHP socket and NAT By: The Natural Philosoph on Fri, 24 February 2012 13:22
		Re: PHP socket and NAT By: Tim Streater on Fri, 24 February 2012 14:20
		Re: PHP socket and NAT By: The Natural Philosoph on Fri, 24 February 2012 15:39
		Re: PHP socket and NAT By: Tim Streater on Fri, 24 February 2012 18:53
		Re: PHP socket and NAT By: The Natural Philosoph on Fri, 24 February 2012 21:04
		Re: PHP socket and NAT By: Tim Streater on Fri, 24 February 2012 21:41
		Re: PHP socket and NAT By: Peter H. Coffin on Sun, 26 February 2012 18:50
		Re: PHP socket and NAT By: Erwin Moller on Thu, 23 February 2012 13:37
		Re: PHP socket and NAT By: The Natural Philosoph on Thu, 23 February 2012 13:50

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