615ae4a6d4eed97a6000ea254ddbf7b8534597b7
howto/Getting-started.md
... | ... | @@ -89,6 +89,9 @@ You may choose your network prefix in one of the currently open netblocks. You c |
89 | 89 | |
90 | 90 | The current guideline is to allocate a /25 or smaller by default, keeping space for up to a /23 if possible. Don't allocate more than a /23 worth of addresses and please **think before you allocate**: If you are going to have 2-3 servers and two VPN-spaces, a /26 is enough to suit your needs. Same will go for most home-networks. This is not public internet, but our IPv4-space is valuable too! |
91 | 91 | |
92 | +For example, if there is no /25 free, you can split up a /24 into two /25. For example if you are looking for a /25 but there are none showing in the Open Netblocks tool, instead pick one of the /24 and click Take it! |
|
93 | +When registering your inetnum, instead of writing 172.2x.xxx.0-172.2x.xxx.255 then you can write 172.2x.xxx.0-172.2x.xxx.127. This will get you a /25 and save our IP space for others. |
|
94 | + |
|
92 | 95 | To register for example 172.20.150.0/26, you need to fill in 172.20.150.0-172.20.150.63. |
93 | 96 | |
94 | 97 | **Note:** Reverse DNS works with _any_ prefix length, as long as your [recursive nameserver](/services/DNS) supports [RFC 2317](https://www.ietf.org/rfc/rfc2317.txt). Don't go for a /24 _just to have RDNS_. |