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Re: PHP socket and NAT [message #177164 is a reply to message #177159]

Fri, 24 February 2012 15:39

The Natural Philosoph
Messages: 993
Registered: September 2010

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Senior Member

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.

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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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