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Managing your cloud resources with OpenStack: Difference between revisions
Managing your cloud resources with OpenStack (view source)
Revision as of 18:23, 10 October 2018
, 6 years agofleshed out CIDR rules section a bit more
(Added mention of rules filtering based on security groups) |
(fleshed out CIDR rules section a bit more) |
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==Using CIDR rules== | ==Using CIDR rules== | ||
[https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing CIDR] | CIDR stands for Classless Inter-Domain Routing and is a standardized way of defining IP ranges (see also this wikipedia page on [https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing CIDR]). | ||
An example of a CIDR rule is <code>192.168.1.1/24</code>. This looks just like a normal IP address with a <code>/24</code> appended to it. IP addresses are made up of 4, 1 byte (8 bit) numbers ranging from 0 to 255. What this <code>/24</code> means is that this CIDR rule will match the first left most 24 bits (3 bytes) of an IP address. In this case any IP address starting with <code>192.168.1</code> will match this CIDR rule. If <code>/32</code> is appended the full 32 bits are specified the IP address must match exactly, likely wise if a <code>/0</code> is appended no bits must match and therefor any IP address will match it. | |||
=Working with Volumes= <!--T:8--> | =Working with Volumes= <!--T:8--> | ||