IP address question

Self build / N/A
January 10, 2012 at 08:47:54
Specs: Vista Ultimate, SP2, 3.0Ghz/2Ghz
Can someone tell me the significance of IP address Is this a popular public IP address? I seen some articles on the internet giving this as a public IP address when setting up a network with both public and private access. Also, how about addresses and Are these popular IP addresses for host gateway to the internet and host DNS IP, respectively? I was talking with someone recently and they mentioned these IP addresses in relation to a host with two NIC cards. Thanks.

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January 10, 2012 at 08:54:33
Is one mailing address more significant than another?
of course not. Neither is the ip address.

SOHO routers tend to use 192.168.0.x or 192.168.1.x but class c private ip goes all the way to yet when was the last time you read of someone using 192.168.254.x?

You may wish to spend some time reviewing the difference between public ip and private ip.

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January 10, 2012 at 09:03:16
IP addresses from to are reserved for private networks and are not visible in the internet.

Routers do often use one of these ip addresses for internal use.
On the external interface of the router, there is another public ip address.

In general, these ip address ranges are all for private networks: - - -

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January 10, 2012 at 09:11:52
could be set to those numbers on any ethernet card. The numbers you reference are likely private numbers issued to the pc's by the router or the set as the actual router's IP address. IPIA, addressing 192.168.XX.XX represents an internal network address. It is common for say a household with 4 computers 2 wireless, 2 connected by wire to 1 wireless router so everyone has highspeed. The gateway component (the router) goes to their Internet service providers dhcp server and requests an address. The ISP server authenticates the session and gives the router it's OUTSIDE address to use the internet; something like Now everyone wishes to tap into the router. It has it's own dhcp component and its own INTERNAL ROUTER ADDRESS; commonly like: or or could be set as The important part is they will all be 192.168.XX.XX, IPIA rules. For this example lets use the routers outside number as, using an Internal Router Address of, Now as devices(everyone's computers) begin attach to the router, they each request that router to give their unit an IP addy so they can get on-line. The dhcp part of the router then begins to assign each computer an IP address, usually on the same network to make sharing easy for beginners. Each computer would in-turn receive an IP address like this (4) computers....,...,...,... So you are likely describing internal numbers. That is the readers digest answer to your question...hope it helps.

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January 10, 2012 at 10:37:05
So, in other words, there is no significance to the IP addresses I mentioned. These addresses could be anything you want them to be, as long as they're set up right and don't interfere with the way the router is set up, correct?

And, if that's correct, then why would some ask what is My answer would be it could be a node on the network and was assigned that IP address from the routers pool of IP addresses used for DHCP. And the other two addresses? Well, the question is unfair, because they could be anything? Am I correct?

Take a look at these articles:


The second one mentions as a public address. This may be totally unrelated, though, and describing a whole other issue.

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January 10, 2012 at 11:04:36
pretty much what i'm saying....in short. PS it is Automatic Private IP Addressing (APIPA), not IPIA as mentioned earlier...up to whazoo in acronyms.

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January 10, 2012 at 12:12:16
Just because its on the internet doesn't mean its correct or right.

"is a company web server that requires access from the Internet. Use STATIC NAT to translate the private, unregistered address to a public, registered address ( for this example)."

This example is wrong. It is private ip only. The is NOT an example of a public ip.

The example in the second link is fine. You just need to understand that "external" does not mean internet. It is the lan between the router and nic1. There is another lan between nic2 and whatever is connected to it.

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