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Telindus 1031 Router
Chapter 7
User manual
117
7.4.1
Introducing NAT and PAT
What is NAT and PAT?
Network Address Translation (NAT) and Port Address Translation (PAT) are used to translate private IP
addresses into official IP addresses. This is also known as IP masquerading.
If you use the Telindus 1031 Router to have a permanent connection to the Internet, you may need NAT
and/or PAT.
Why use NAT and PAT?
Each device connected to the Internet must have an
official
(i.e. unique) IP address. The success of the
Internet has caused a lack of these official IP addresses. As a result, your Internet Service Provider (ISP)
may offer you only one or a small number of official IP addresses.
If the number of IP devices on your local network is larger than the number of official IP addresses, you
can assign test or private IP addresses to your local network. In that case, you have to configure your
Telindus 1031 Router to translate IP addresses using NAT or PAT.
Even when there are sufficient official IP addresses available, you may still choose to use NAT e.g. for
preserving previously assigned test addresses to all the devices on your local network.
Private IP address range
The international authority IANA assigns the official (also called global) IP addresses. It has also defined
3 ranges of IP addresses for private use. This means that you can use these addresses without regis-
tration on your internal network, as long as you are not connected to the Internet.
You can define (sub-)networks in these ranges for your
private IP addresses
.
Private IP address range
Remarks
10.0.0.0 - 10.255.255.255
1 class A network
172.16.0.0 - 172.31.255.255
16 class B networks
192.168.0.0 - 192.168.255.255
256 class C networks
Содержание 1031
Страница 11: ...Telindus 1031 Router User manual 1 User manual ...
Страница 12: ...Telindus 1031 Router User manual 2 ...
Страница 38: ...Telindus 1031 Router Chapter 2 User manual Installing and connecting the Telindus 1031 Router 28 ...
Страница 80: ...Telindus 1031 Router Chapter 5 User manual Basic configuration 70 ...
Страница 168: ...Telindus 1031 Router Chapter 8 User manual Configuring the bridge 158 ...
Страница 179: ...Telindus 1031 Router Reference manual 169 Reference manual ...
Страница 180: ...Telindus 1031 Router Reference manual 170 ...
Страница 308: ...Telindus 1031 Router Chapter 11 Reference manual Status attributes 298 ...
Страница 336: ...Telindus 1031 Router Chapter 12 Reference manual Performance attributes 326 ...
Страница 348: ...Telindus 1031 Router Chapter 13 Reference manual Alarm attributes 338 ...
Страница 362: ...Telindus 1031 Router Chapter 15 Reference manual Auto installing the Telindus 1031 Router 352 ...
Страница 370: ...Telindus 1031 Router Chapter 16 Reference manual Downloading software 360 ...
Страница 380: ...Telindus 1031 Router Chapter 17 Reference manual Technical specifications 370 ...
Страница 381: ...Telindus 1031 Router Annex 371 Annex ...
Страница 382: ...Telindus 1031 Router Annex 372 ...
Страница 384: ...Telindus 1031 Router Annex A Annex common TCP and UDP numbers 374 ...
Страница 386: ...Telindus 1031 Router Annex B Annex product information 376 ...
Страница 394: ...Telindus 1031 Router Index Annex 384 ...