howto/Getting-started.md
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@@ -82,17 +82,19 @@ You may choose your network prefix in one of the currently open netblocks. You c
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| Size | Comment |
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|-----:|:-------------------------|
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-| /23 | maximum allocation size! |
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| /24 | are you an organization? |
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-| /25 | default-_ish_ |
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+| /25 | still a lot of IPs! |
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| /26 | usually enough |
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+| /27 | default allocation |
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+| /28 | usually enough |
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+| /29 | starter pack |
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-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!
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+The current guideline is to allocate a /27 or smaller by default, keeping space for up to a /26 if possible. Don't allocate more than a /24 worth of addresses and please **think before you allocate**: If you are going to have 2-3 servers and two VPN-spaces, a /28 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!
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-For example, if there is no /25 free, you can split up a /24 into two /25. 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!
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-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.
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+For example, if there is no /27 free, you can split up a /26 into two /27. If you are looking for a /27 but there are none showing in the Open Netblocks tool, instead pick one of the /26 and click Take it!
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+When registering your inetnum, instead of writing 172.2x.xxx.0-172.2x.xxx.63 then you can write 172.2x.xxx.0-172.2x.xxx.31. This will get you a /27 and save our IP space for others.
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-To register for example 172.20.150.0/26, you need to fill in 172.20.150.0-172.20.150.63.
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+To register for example 172.20.150.0/27, you need to fill in 172.20.150.0-172.20.150.31.
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**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_.
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