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Private IP Addresses

  • الجمعة 11 مايو 2018 06:44 م
  • 3 مشاهدة

r exception—network computers that are linked to a router and share the same public IP address.

Yes. If you have a router, you have a private IP address.

And here’s how it works…

Reserved for private networks.

The organizations that distribute IP addresses to the world reserves a range of IP addresses for private networks.

  • 192.168.0.0 – 192.168.255.255 (65,536 IP addresses)
  • 172.16.0.0 – 172.31.255.255 (1,048,576 IP addresses)
  • 10.0.0.0 – 10.255.255.255 (16,777,216 IP addresses)

Your simple home network, with its router at the center and computers connected to it—wired or wireless—classifies as one of those networks.

Your router—once it makes its Internet connection through your Internet Service Provider—sends Internet activity to any computer connected to your router, and is the basis of a networking innovation called a Network Address Translation (NAT).

  • NAT is a process in which your router changes your private IP Address into a public one so that it can send your traffic over the Internet, keeping track of the changes in the process.
  • When the information comes back to your router, it reverses the change—from a real IP address into a private one—and forwards the traffic back to your computer.

In other words, the router connects to the other devices (usually desktops, laptops and tablets).

PrivacyYour private IP is just that. Private.

That’s the point: Your private address is just for your router, your network and you.

The private address ranges in a network don’t have to be synchronized with the rest of the world and Internet.

As a matter of fact, the private address range can be used by more than one address. A network administrator using these private addresses has more room for subnetting, and many more assignable addresses.

The private IP address does one job for your home network.

These blocks of addresses can be used by a private network. Even if your neighbor is using the exact same addresses, it won’t cause a problem, because that’s HIS or HER network, not yours.

Don’t let that confuse you.

You see, these private addresses are known as non-routable addresses. The networking on the Internet routes Internet activity connected to your public IP address only, not your private IP.

Network DiagramHow Private and public IP addresses work together.

Four key takeaways

To wrap up our discussion about public and private IP addresses, keep these four ideas in mind:

1

Private IP addresses are untracked and unrestricted. WhatIsMyIPaddess.com cannot geographically locate a user’s computer by their private IP address.

2

It is perfectly normal to see traffic from these numbers if you have a small home or office network. By default, most routers and access points use these numbers to assign to your local computers. It is most likely these numbers represent computers on your own internal network.

3

If you see these numbers in the headers of an unsolicited email, they usually indicate transit between servers within a corporate network or ISP. Again, they are not useful in identifying the origin of an email. In such cases, you can usually find the true origin by looking for the earliest “Received” mail header.

4

The traffic does not come from the IANA (the Internet Assigned Numbers Authority), a non-government, Internet-specific organization that gives out (assigns and allocates) IP addresses. As the authority for IP addresses, they do not use or operate them, and they are not the source of the traffic.

 

 

 

r exception—network computers that are linked to a router and share the same public IP address.

Yes. If you have a router, you have a private IP address.

And here’s how it works…

Reserved for private networks.

The organizations that distribute IP addresses to the world reserves a range of IP addresses for private networks.

  • 192.168.0.0 – 192.168.255.255 (65,536 IP addresses)
  • 172.16.0.0 – 172.31.255.255 (1,048,576 IP addresses)
  • 10.0.0.0 – 10.255.255.255 (16,777,216 IP addresses)

Your simple home network, with its router at the center and computers connected to it—wired or wireless—classifies as one of those networks.

Your router—once it makes its Internet connection through your Internet Service Provider—sends Internet activity to any computer connected to your router, and is the basis of a networking innovation called a Network Address Translation (NAT).

  • NAT is a process in which your router changes your private IP Address into a public one so that it can send your traffic over the Internet, keeping track of the changes in the process.
  • When the information comes back to your router, it reverses the change—from a real IP address into a private one—and forwards the traffic back to your computer.

In other words, the router connects to the other devices (usually desktops, laptops and tablets).

PrivacyYour private IP is just that. Private.

That’s the point: Your private address is just for your router, your network and you.

The private address ranges in a network don’t have to be synchronized with the rest of the world and Internet.

As a matter of fact, the private address range can be used by more than one address. A network administrator using these private addresses has more room for subnetting, and many more assignable addresses.

The private IP address does one job for your home network.

These blocks of addresses can be used by a private network. Even if your neighbor is using the exact same addresses, it won’t cause a problem, because that’s HIS or HER network, not yours.

Don’t let that confuse you.

You see, these private addresses are known as non-routable addresses. The networking on the Internet routes Internet activity connected to your public IP address only, not your private IP.

Network DiagramHow Private and public IP addresses work together.

Four key takeaways

To wrap up our discussion about public and private IP addresses, keep these four ideas in mind:

1

Private IP addresses are untracked and unrestricted. WhatIsMyIPaddess.com cannot geographically locate a user’s computer by their private IP address.

2

It is perfectly normal to see traffic from these numbers if you have a small home or office network. By default, most routers and access points use these numbers to assign to your local computers. It is most likely these numbers represent computers on your own internal network.

3

If you see these numbers in the headers of an unsolicited email, they usually indicate transit between servers within a corporate network or ISP. Again, they are not useful in identifying the origin of an email. In such cases, you can usually find the true origin by looking for the earliest “Received” mail header.

4

The traffic does not come from the IANA (the Internet Assigned Numbers Authority), a non-government, Internet-specific organization that gives out (assigns and allocates) IP addresses. As the authority for IP addresses, they do not use or operate them, and they are not the source of the traffic.