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Re: PHP socket and NAT

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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...

> /Str.

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Thread

PHP socket and NAT "SL" <sb5309@hotmail.com> - 2012-02-23 16:58 +0800
  Re: PHP socket and NAT Erwin Moller <erwinmollerusenet@xs4all.nl> - 2012-02-23 11:32 +0100
    Re: PHP socket and NAT Captain Paralytic <paul_lautman@yahoo.com> - 2012-02-23 02:41 -0800
      Re: PHP socket and NAT Erwin Moller <erwinmollerusenet@xs4all.nl> - 2012-02-23 11:53 +0100
    Re: PHP socket and NAT Erwin Moller <erwinmollerusenet@xs4all.nl> - 2012-02-23 11:52 +0100
      Re: PHP socket and NAT "sl@exabyte" <sb5309@hotmail.com> - 2012-02-23 21:04 +0800
        Re: PHP socket and NAT The Natural Philosopher <tnp@invalid.invalid> - 2012-02-23 13:37 +0000
  Re: PHP socket and NAT The Natural Philosopher <tnp@invalid.invalid> - 2012-02-23 11:40 +0000
  Re: PHP socket and NAT Jerry Stuckle <jstucklex@attglobal.net> - 2012-02-23 08:00 -0500
    Re: PHP socket and NAT "sl@exabyte" <sb5309@hotmail.com> - 2012-02-23 21:09 +0800
      Re: PHP socket and NAT Captain Paralytic <paul_lautman@yahoo.com> - 2012-02-23 05:19 -0800
        Re: PHP socket and NAT The Natural Philosopher <tnp@invalid.invalid> - 2012-02-23 13:53 +0000
          Re: PHP socket and NAT Captain Paralytic <paul_lautman@yahoo.com> - 2012-02-23 06:25 -0800
            Re: PHP socket and NAT Michael Fesser <netizen@gmx.de> - 2012-02-23 18:28 +0100
            Re: PHP socket and NAT The Natural Philosopher <tnp@invalid.invalid> - 2012-02-23 20:42 +0000
          Re: PHP socket and NAT "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-02-24 11:58 +0100
        Re: PHP socket and NAT "SL" <sb5309@hotmail.com> - 2012-02-24 00:03 +0800
          Re: PHP socket and NAT The Natural Philosopher <tnp@invalid.invalid> - 2012-02-23 20:44 +0000
          Re: PHP socket and NAT "M. Strobel" <sorry_no_mail_here@nowhere.dee> - 2012-02-24 12:07 +0100
            Re: PHP socket and NAT The Natural Philosopher <tnp@invalid.invalid> - 2012-02-24 13:22 +0000
              Re: PHP socket and NAT Tim Streater <timstreater@greenbee.net> - 2012-02-24 14:20 +0000
                Re: PHP socket and NAT The Natural Philosopher <tnp@invalid.invalid> - 2012-02-24 15:39 +0000
                Re: PHP socket and NAT Tim Streater <timstreater@greenbee.net> - 2012-02-24 18:53 +0000
                Re: PHP socket and NAT The Natural Philosopher <tnp@invalid.invalid> - 2012-02-24 21:04 +0000
                Re: PHP socket and NAT Tim Streater <timstreater@greenbee.net> - 2012-02-24 21:41 +0000
                Re: PHP socket and NAT "Peter H. Coffin" <hellsop@ninehells.com> - 2012-02-26 12:50 -0600
      Re: PHP socket and NAT Erwin Moller <erwinmollerusenet@xs4all.nl> - 2012-02-23 14:37 +0100
      Re: PHP socket and NAT The Natural Philosopher <tnp@invalid.invalid> - 2012-02-23 13:50 +0000

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