653
edits
Changes
Jump to navigation
Jump to search
Line 35:
Line 35: + + + + + + + + + + + +
SME Server:Documentation:Administration Manual:Chapter3 (view source)
Revision as of 15:31, 26 April 2021
, 15:31, 26 April 2021→Routable versus non-routable IP addresses
=====Routable versus non-routable IP addresses=====
=====Routable versus non-routable IP addresses=====
If an IP address is analogous to your phone number, then a routable IP address is the equivalent of a full telephone number complete with country code and area code such as +1-613-555-1234. Using the same analogy, a non-routable address is the equivalent of an office extension. If your server is assigned a non-routable address, it cannot directly receive incoming Internet connections, which limits the services that it can provide to your site.
If an IP address is analogous to your phone number, then a routable IP address is the equivalent of a full telephone number complete with country code and area code such as +1-613-555-1234. Using the same analogy, a non-routable address is the equivalent of an office extension. If your server is assigned a non-routable address, it cannot directly receive incoming Internet connections, which limits the services that it can provide to your site.
The following three groups of IPv4 addresses are reserved for non-routeable use:
10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255
192.168.0.0 - 192.168.255.255
The first and last of these groups are preferred for private networks:
"In August 2012, ARIN began allocating “172” address space to internet service, wireless, and content providers. There have been reports from the community that many network operators are denying access to devices having IP addresses from within the entire 172 /8 range. As a result, any device with a 172.x.x.x IP address may have difficulty reaching some sites on the global Internet." See {https://www.arin.net/reference/research/statistics/address_filters/ ARIN} for more on this.
{{warning box|If you wish to join two networks via VPN is is IMPERATIVE that they are on different IP blocks, e.g 192.168.100.0 and 192.168.200.0, for trafic to be routed between them.}}
====Arranging connectivity with your ISP====
====Arranging connectivity with your ISP====