Network Address Translation - Revision history

173.88.199.104 at 19:20, 13 August 2012

2012-08-13T19:20:34Z

173.88.199.104 at 17:54, 13 August 2012

2012-08-13T17:54:13Z

173.88.199.104 at 13:41, 13 August 2012

2012-08-13T13:41:54Z

Jimbo: Reverted edits by 47.237.0.41 (Talk); changed back to last version by Jimbo

2009-05-22T13:47:02Z

Reverted edits by 47.237.0.41 (Talk); changed back to last version by Jimbo

47.237.0.41 at 07:41, 22 May 2009

2009-05-22T07:41:25Z

Jimbo: Reverted edits by 208.255.68.245 (Talk); changed back to last version by Jimbo

2007-08-20T04:47:38Z

Reverted edits by 208.255.68.245 (Talk); changed back to last version by Jimbo

Jimbo at 21:32, 21 June 2007

2007-06-21T21:32:55Z

24.23.181.229 at 09:02, 30 April 2007

2007-04-30T09:02:37Z

Dave at 04:45, 14 December 2005

2005-12-14T04:45:49Z

Jimbo at 03:51, 15 November 2004

2004-11-15T03:51:20Z

@@ Line 1: / Line 1: @@
-'''Network Address Translation''', aka '''NAT''', is a function which allows privately addressed networks to access publicly addressed namespaces, by using an intermediary publicly addressed [[gateway]] as a go-between.
+'''Network Address Translation''', aka '''NAT''', is a function which allows privately addressed networks (LAN) to access public internet by using an intermediary publicly addressed [[gateway]] as a go-between.
 For example, say you have a machine with an IP address of 192.168.0.2.  192.168.0.0-192.168.0.255 is a ''private'' subnet, which means that there may be (and in fact are) thousands or hundreds of thousands of machines all using those IP addresses, all over the world.  For this reason, you cannot access the internet directly from this IP address - if you tried to, the web (or other type) server you were trying to talk to wouldn't know which of thousands of identically numbered networks to route its response to!  So your privately addressed computer needs a gateway to NAT your traffic for you if that traffic is going to leave your private network.
@@ Line 31: / Line 33: @@
 This limitation can be circumvented to some extent by creating permanent mappings of ports on the WAN side of the gateway with IPs and ports on the private side - for example if you wanted to run a web server on a machine on the inside of the LAN with a private IP address, you could tell the gateway to always NAT-and-forward traffic aimed at port 80 of its WAN to the inside machine's port 80.  Many NAT devices (including FreeBSD machines running [[natd]]) can also map to different inside ports than the WAN port which received the data; so for instance you could route WAN:8080 to port 80 on one inside machine, and WAN:80 to port 80 on a different inside machine.
 [[Category:FreeBSD Terminology]]
 [[Category:Securing FreeBSD]]

← Older revision		Revision as of 17:54, 13 August 2012
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	[[Category:FreeBSD Terminology]]		[[Category:FreeBSD Terminology]]
−	[[Category:~~Firewall~~]]	+	[[Category:Securing FreeBSD]]

← Older revision		Revision as of 13:41, 13 August 2012
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	[[Category:FreeBSD Terminology]]		[[Category:FreeBSD Terminology]]
−	~~[[Category:Securing FreeBSD]]~~
	[[Category:Firewall]]		[[Category:Firewall]]

← Older revision		Revision as of 13:47, 22 May 2009
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−	~~http://www.textnocolilaricl.com~~
	'''Network Address Translation''', aka '''NAT''', is a function which allows privately addressed networks to access publicly addressed namespaces, by using an intermediary publicly addressed [[gateway]] as a go-between.		'''Network Address Translation''', aka '''NAT''', is a function which allows privately addressed networks to access publicly addressed namespaces, by using an intermediary publicly addressed [[gateway]] as a go-between.

← Older revision		Revision as of 07:41, 22 May 2009
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		+	http://www.textnocolilaricl.com
	'''Network Address Translation''', aka '''NAT''', is a function which allows privately addressed networks to access publicly addressed namespaces, by using an intermediary publicly addressed [[gateway]] as a go-between.		'''Network Address Translation''', aka '''NAT''', is a function which allows privately addressed networks to access publicly addressed namespaces, by using an intermediary publicly addressed [[gateway]] as a go-between.

← Older revision		Revision as of 21:32, 21 June 2007
Line 36:		Line 36:
	[[Category:FreeBSD Terminology]]		[[Category:FreeBSD Terminology]]
	[[Category:Securing FreeBSD]]		[[Category:Securing FreeBSD]]
		+	[[Category:Firewall]]

← Older revision		Revision as of 04:45, 14 December 2005
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	[[Category:FreeBSD Terminology]]		[[Category:FreeBSD Terminology]]
		+	[[Category:Securing FreeBSD]]

@@ Line 9: / Line 9: @@
 .168.0.100 sends packet out.           src: 192.168.0.100:32798 dst: 64.89.70.2:53
   -------------------------------------------------------------------------------------
-  <font color="red">'''192.168.0.1   NATs packet, forwards out.  src: 24.31.168.192:58998</font> dst: 64.89.70.2:53'''
+  '''192.168.0.1   NATs packet, forwards out.  <font color="red">src: 24.31.168.192:58998</font> dst: 64.89.70.2:53'''
   -------------------------------------------------------------------------------------
 .31.168.16  accepts packet, forwards.   src: 24.31.168.192:58998 dst: 64.89.70.2:53
@@ Line 22: / Line 22: @@
 .31.168.16  accepts packet, forwards.   src: 64.89.70.2:53       dst: 24.31.168.192:58998
   -------------------------------------------------------------------------------------
-  <font color="red">'''24.31.168.192 accepts packet, NATs it.</font>    src: 64.89.70.2:53       <font color="red">dst: 192.168.0.100:32798'''</font>
+  '''24.31.168.192 accepts packet, NATs it.    src: 64.89.70.2:53       <font color="red">dst: 192.168.0.100:32798'''</font>
   -------------------------------------------------------------------------------------
 .168.0.100 accepts packet, processes.