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thechuckster Forums Junkie Location: Brisbane Registered: February 2003	Re: Connecting pc to pc Thu, 18 March 2004 07:15 the diagram is somewhat misleading - the web servers and workstations all have different private IP addresses that are contactable by (or 'routable' to) machines inside the firewall only. However, the firewall/router/NAT device translates those addresses to the 'public' address when they connect to an external machine. And a HTTP request from the external network into firewall is translated to one of the internal addresses when passed thru the firewall/router/NAT. However, when the second scenario is used to feed a bank of servers (e.g. a farm of web servers, the firewall/NAT function is performed by a load-balancing device (e.g. a smart DNS/firewall) to spread the requests over many servers. This load balancing function is often used for DNS servers (e.g. optusnet have a farm of servers doing this so if one fails, you never know, and the DNS 'farm' is always available thru a few IP addresses) and web servers (e.g. google or akami) for very high-traffic sites. Businesses might use 'load balancing' to spread different kinds of networking traffic over different servers (e.g. domain is charles.com.au and only has one 'public' IP address, yet one server does mail, another does ftp and the third does http) but they all appear to use the one 'public' IP address, even tho internally, they're different 'private' IP addresses. But ... all this is academic ... if you've got domestic cable - optus block incoming port 80 traffic as well as other commonly-exploited ports. I assume that telstra do similar things. [Report message to a moderator]

	Subject	Poster	Date
	Connecting pc to pc	Lambolica	Wed, 17 March 2004 04:30
	Re: Connecting pc to pc	draven	Wed, 17 March 2004 04:34
	Re: Connecting pc to pc	Lambolica	Wed, 17 March 2004 04:49
	Re: Connecting pc to pc	THE WITZL	Wed, 17 March 2004 04:41
	Re: Connecting pc to pc	Nark	Wed, 17 March 2004 04:51
	Re: Connecting pc to pc	ehendrikd	Wed, 17 March 2004 04:57
	Re: Connecting pc to pc	Lambolica	Wed, 17 March 2004 04:59
	Re: Connecting pc to pc	ehendrikd	Wed, 17 March 2004 05:12
	Re: Connecting pc to pc	Lambolica	Wed, 17 March 2004 05:28
	Re: Connecting pc to pc	thechuckster	Wed, 17 March 2004 13:06
	Re: Connecting pc to pc	Nark	Wed, 17 March 2004 21:58
	Re: Connecting pc to pc	Lambolica	Wed, 17 March 2004 22:37
	Re: Connecting pc to pc	ehendrikd	Wed, 17 March 2004 22:38
	Re: Connecting pc to pc	RobST162	Wed, 17 March 2004 22:46
	Re: Connecting pc to pc	Nark	Wed, 17 March 2004 22:54
	Re: Connecting pc to pc	RobST162	Wed, 17 March 2004 22:59
	Re: Connecting pc to pc	Nark	Thu, 18 March 2004 00:05
	Re: Connecting pc to pc	RobST162	Thu, 18 March 2004 00:15
	Re: Connecting pc to pc	Nark	Thu, 18 March 2004 00:25
	Re: Connecting pc to pc	RobST162	Thu, 18 March 2004 00:36
	Re: Connecting pc to pc	Nark	Thu, 18 March 2004 00:49
	Re: Connecting pc to pc	RobST162	Thu, 18 March 2004 00:56
	Re: Connecting pc to pc	Nark	Thu, 18 March 2004 01:01
	Re: Connecting pc to pc	RobST162	Thu, 18 March 2004 01:08
	Re: Connecting pc to pc	RobST162	Thu, 18 March 2004 01:44
	Re: Connecting pc to pc	Nark	Thu, 18 March 2004 02:00
	Re: Connecting pc to pc	RobST162	Thu, 18 March 2004 02:06
	Re: Connecting pc to pc	thechuckster	Thu, 18 March 2004 04:16
	Re: Connecting pc to pc	Lambolica	Thu, 18 March 2004 04:24
	Re: Connecting pc to pc	Nark	Thu, 18 March 2004 04:30
	Re: Connecting pc to pc	Norminator	Thu, 18 March 2004 04:09
	Re: Connecting pc to pc	RobST162	Thu, 18 March 2004 04:14
	Re: Connecting pc to pc	Norminator	Thu, 18 March 2004 04:31
	Re: Connecting pc to pc	Lambolica	Thu, 18 March 2004 04:36
	Re: Connecting pc to pc	Nark	Thu, 18 March 2004 04:40
	Re: Connecting pc to pc	Lambolica	Thu, 18 March 2004 04:40
	Re: Connecting pc to pc	Nark	Thu, 18 March 2004 04:41
	Re: Connecting pc to pc	Lambolica	Thu, 18 March 2004 04:48
	Re: Connecting pc to pc	boris	Thu, 18 March 2004 04:59
	Re: Connecting pc to pc	Nark	Thu, 18 March 2004 05:03
	Re: Connecting pc to pc	Lambolica	Thu, 18 March 2004 05:06
	Re: Connecting pc to pc	Nark	Thu, 18 March 2004 05:14
	Re: Connecting pc to pc	Lambolica	Thu, 18 March 2004 05:20
	Re: Connecting pc to pc	ehendrikd	Thu, 18 March 2004 05:37
	Re: Connecting pc to pc	thechuckster	Thu, 18 March 2004 07:15
	Re: Connecting pc to pc	ae86drift	Thu, 18 March 2004 07:55
	Re: Connecting pc to pc	Nark	Thu, 18 March 2004 04:25
	Re: Connecting pc to pc	Squid	Thu, 18 March 2004 10:27
	Re: Connecting pc to pc	RobST162	Thu, 18 March 2004 10:31
	Re: Connecting pc to pc	Squid	Thu, 18 March 2004 10:42
	Re: Connecting pc to pc	Nark	Mon, 12 April 2004 10:19
	Re: Connecting pc to pc	thechuckster	Mon, 12 April 2004 10:55
	Re: Connecting pc to pc	RobST162	Mon, 12 April 2004 11:49
	Re: Connecting pc to pc	thechuckster	Mon, 12 April 2004 12:26
	Re: Connecting pc to pc	RobST162	Mon, 12 April 2004 12:30
	Re: Connecting pc to pc	thechuckster	Mon, 12 April 2004 12:54
	Re: Connecting pc to pc	RobST162	Mon, 12 April 2004 12:59
	Re: Connecting pc to pc	Nark	Tue, 13 April 2004 00:21
	Re: Connecting pc to pc	Norminator	Tue, 13 April 2004 00:51
	Re: Connecting pc to pc	thechuckster	Tue, 13 April 2004 02:26
	Re: Connecting pc to pc	RobST162	Tue, 13 April 2004 02:48
	Re: Connecting pc to pc	thechuckster	Tue, 13 April 2004 07:00
	Re: Connecting pc to pc	Norminator	Sat, 17 April 2004 03:58
	Re: Connecting pc to pc	Nark	Sat, 17 April 2004 10:21
	Re: Connecting pc to pc	ehendrikd	Thu, 18 March 2004 00:55
	Re: Connecting pc to pc	ehendrikd	Thu, 18 March 2004 01:03
	Re: Connecting pc to pc	ae86drift	Thu, 18 March 2004 07:57
	Re: Connecting pc to pc	Squid	Thu, 18 March 2004 10:40
	Re: Connecting pc to pc	Squid	Thu, 18 March 2004 10:45
	Re: Connecting pc to pc	RobST162	Thu, 18 March 2004 11:13
	Re: Connecting pc to pc	Squid	Thu, 18 March 2004 11:25
	Re: Connecting pc to pc	ae86drift	Thu, 18 March 2004 12:23
	Re: Connecting pc to pc	Nark	Thu, 18 March 2004 12:26
	Re: Connecting pc to pc	thechuckster	Thu, 18 March 2004 13:10
	Re: Connecting pc to pc	ehendrikd	Thu, 18 March 2004 22:27
	Re: Connecting pc to pc	Squid	Thu, 18 March 2004 23:54
	Re: Connecting pc to pc	Squid	Thu, 18 March 2004 22:24
	Re: Connecting pc to pc	Norminator	Fri, 19 March 2004 06:56
	Re: Connecting pc to pc	Nark	Fri, 19 March 2004 07:18
	Re: Connecting pc to pc	Squid	Sun, 21 March 2004 22:23
	Re: Connecting pc to pc	Nark	Mon, 22 March 2004 01:57
	Re: Connecting pc to pc	Squid	Mon, 22 March 2004 02:24
	Re: Connecting pc to pc	Squid	Mon, 22 March 2004 02:25
	Re: Connecting pc to pc	Norminator	Mon, 22 March 2004 03:17
	Re: Connecting pc to pc	Squid	Mon, 22 March 2004 03:47
	Re: Connecting pc to pc	Squid	Mon, 22 March 2004 03:55
	Re: Connecting pc to pc	Nark	Mon, 22 March 2004 04:00
	Re: Connecting pc to pc	Norminator	Mon, 22 March 2004 06:28
	Re: Connecting pc to pc	thechuckster	Mon, 22 March 2004 08:15
	Re: Connecting pc to pc	Norminator	Wed, 24 March 2004 06:06
	Re: Connecting pc to pc	Nark	Mon, 22 March 2004 03:53
	Re: Connecting pc to pc	Squid	Mon, 22 March 2004 04:10
	Re: Connecting pc to pc	Squid	Mon, 22 March 2004 04:18
	Re: Connecting pc to pc	Nark	Mon, 22 March 2004 04:26
	Re: Connecting pc to pc	Squid	Mon, 22 March 2004 04:34
	Re: Connecting pc to pc	Norminator	Mon, 22 March 2004 05:58
	Re: Connecting pc to pc	Nark	Mon, 22 March 2004 04:32
	Re: Connecting pc to pc	torque	Mon, 22 March 2004 10:03
	Re: Connecting pc to pc	4AGE	Tue, 23 March 2004 14:41
	Re: Connecting pc to pc	Flem	Wed, 31 March 2004 09:24
	Re: Connecting pc to pc	Nark	Fri, 16 April 2004 05:20
	Re: Connecting pc to pc	Nark	Thu, 06 May 2004 12:08
	Re: Connecting pc to pc	RobST162	Thu, 06 May 2004 13:58
	Re: Connecting pc to pc	thechuckster	Thu, 06 May 2004 14:34
	Re: Connecting pc to pc	Nark	Thu, 06 May 2004 23:25
	Re: Connecting pc to pc	thechuckster	Fri, 07 May 2004 10:44
	Re: Connecting pc to pc	Nark	Fri, 07 May 2004 13:43
	Re: Connecting pc to pc	Allan	Thu, 06 May 2004 14:08
	Re: Connecting pc to pc	RobST162	Thu, 06 May 2004 14:09
	Re: Connecting pc to pc	torque	Thu, 06 May 2004 15:39
	Re: Connecting pc to pc	RobST162	Thu, 06 May 2004 22:58

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