mirror of
https://github.com/ChronosX88/netsukuku.git
synced 2024-11-29 21:52:18 +00:00
65 lines
2.5 KiB
Plaintext
65 lines
2.5 KiB
Plaintext
|
== NTK_RFC 0008 ==
|
||
|
|
|
||
|
|
Subject: Private IP classes in restricted mode
|
||
|
|
|
||
|
|
----
|
||
|
|
This text describes a change to the Npv7.
|
||
|
|
It will be included in the final documentation, so feel free to correct it.
|
||
|
|
But if you want to change the system here described, please contact us first.
|
||
|
|
----
|
||
|
|
|
||
|
|
The user can decide to use, in restricted mode, a different private IP
|
||
|
|
class from the default one ( 10.x.x.x ). This is useful if the 10.x.x.x class
|
||
|
|
cannot be used, for example in Russia, it is very popular to provide Internet
|
||
|
|
access through big LANs which use the 10.x.x.x class.
|
||
|
|
|
||
|
|
The other available classes are:
|
||
|
|
{{{
|
||
|
|
172.16.0.0 - 172.31.255.255 = 16*2^16 = 1048576 IPs
|
||
|
|
192.168.0.0 - 192.168.255.255 = 2^16 = 65536 IPs
|
||
|
|
}}}
|
||
|
|
|
||
|
|
The 192.168.x.x class cannot be used as an alternate restricted mode IP class
|
||
|
|
because it is the default Netsukuku private class, thus the only alternative
|
||
|
|
to 10.x.x.x is the "172.16.0.0 - 172.31.255.255" IP class.
|
||
|
|
However it is adviced to always use the default class.
|
||
|
|
|
||
|
|
== Netsukuku private classes ==
|
||
|
|
|
||
|
|
It necessary to provide at least one private IP class inside Netsukuku to
|
||
|
|
allow the creation of private LANs which are connected to Netsukuku with just
|
||
|
|
one node.
|
||
|
|
|
||
|
|
The default Netsukuku private class is 192.168.x.x.
|
||
|
|
The random IPs choosen by the nodes will be never one of that class.
|
||
|
|
The default private class is valid both in normal and restricted mode.
|
||
|
|
|
||
|
|
Only in normal mode the "172.16.0.0 - 172.31.255.255" class becomes private.
|
||
|
|
This class is assigned to very large private networks.
|
||
|
|
|
||
|
|
The 10.x.x.x class IS NOT private since it is too big and it would be just a
|
||
|
|
waste of IP addresses to use it as a private class.
|
||
|
|
Note also that for each Netsukuku node you can have a private network,
|
||
|
|
therefore with just 16 Netsukuku nodes you can form a private network of
|
||
|
|
16777216 nodes, which is equivalent to a 10.x.x.x class.
|
||
|
|
|
||
|
|
== Notes on the restricted mode ==
|
||
|
|
|
||
|
|
A node which runs in restricted mode cannot be compatible with normal mode
|
||
|
|
nodes, for this reason a restricted node will drop any packets coming from a
|
||
|
|
normal node.
|
||
|
|
|
||
|
|
While in restricted mode the "172.16.0.0 - 172.31.255.255" class IS NOT
|
||
|
|
private.
|
||
|
|
|
||
|
|
In restricted mode, when two different networks which use different
|
||
|
|
private classes (say 10.x.x.x and 192.168.x.x) are linked, nothing happens and
|
||
|
|
they will not rehook, this is necessary because it's assumed that the specified
|
||
|
|
private class is the only choice the user can utilize.
|
||
|
|
This leds to some problems, consider this scenario:
|
||
|
|
{{{
|
||
|
|
10.0.0.0 <-> 172.16.0.0
|
||
|
|
}}}
|
||
|
|
In this case the rehook isn't launched, so it is possible that there will be a
|
||
|
|
lot of collision.
|