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2. networking - CIDR for Dummies - Server Fault

   serverfault.com/questions/12854

   The easiest way to start calculating VLSM/CIDR in your head is to understand the "natural" 8-bit boundaries: CIDR Dotted Quad /8 255.0.0.0 /16 255.255.0.0 /24 255.255.255.0 /32 255.255.255.255 (By the way, it's perfectly legal, and fairly common in ACLs, to use a /32 mask. It simply means that you are referring to a single IP)

3. IPv4 CIDR Ranges for Everything except RFC1918 - Server Fault

   serverfault.com/questions/304781

   I'm looking for a list of CIDR blocks for "The Internet", i.e. everything from 0.0.0.0 to 223.255.255.255, excluding RFC1918 address space of 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 (yes, I know there are lots of little nets in there that are special, like 192.0.0.0/24, but I really don't care about them).

4. Difference between Masked IP and Single IP? - Server Fault

   serverfault.com/questions/546424

   A single IP is similar to a masked ip with a mask of 255.255.255.255 or /32 in CIDR notation. A masked IP is, in this case, a subnet definition. 10.2.0.0;255.255.0.0. means 10.2.0.0/16 which are all addresses from 10.2.0.0 to 10.2.255.255 (including network and broadcast addresses) Share. Improve this answer. answered Oct 16, 2013 at 14:32.

5. subnet - confused about CIDR interpretation - Server Fault

   serverfault.com/questions/1035157/confused-about-cidr-interpretation

   CIDR notation (Classless Inter-Domain Routing) is an alternate method of representing a subnet mask. It is simply a count of the number of network bits (bits that are set to 1) in the subnet mask. Indeed, this is the information it contains. Meaning that a CIDR in this form 10.0.0.0/30 means that. The networkID is 10.0.0.0 and the subnet mask ...

6. How to route only specific subnet to OpenVPN Server

   serverfault.com/questions/988448

   I want to route only traffic for 192.168.255.0/24 through my remote openvpn server. This answer suggests adding the following to the client .ovpn route-nopull route 192.168.255.0 255.255.255.0

7. While using Nmap and sweep the network with a ping

   serverfault.com/questions/379200/while-using-nmap-and-sweep-the-network-with-a...

   Nmap allows all sorts of target specifications. To scan more than one machine at a time, you could use a list of IP addresses, hostnames, a network in CIDR notation like your example, or a range like 10.0.0.0-255, which is equivalent to your example. Internally, Nmap separates all the targets specified into individual addresses and sends probes ...

8. Identifying subnet bits of network addresses with same CIDR

   serverfault.com/.../identifying-subnet-bits-of-network-addresses-with-same-cidr

   They all have CIDR of 30. I realize all three subnets have two usable hosts. All three addresses have subnet mask 255.255.255.252 but different number of possible subnets. 10.255.255.252/30 has 30-8=22 bits reserved for subnets (class A). 10.10.255.252/30 has 30-16=14 bits reserved for subnets (class B). 10.10.10.252/30 has 30-24=6 bits ...

9. What does a CIDR mask mean in the context of "ip address add"?

   serverfault.com/questions/1151579/what-does-a-cidr-mask-mean-in-the-context-of...

   4. ip address add dev wg0 192.168.2.1/24. That adds the IP address 192.168.2.1 to the indicated interface, with a subnet mask of /24 or 255.255.255.0. The possible IP addresses for wg clients are 192.168.2.2 through 192.168.2.254. Essentially, the /24 defines the maximum number of clients that may connect simultaneously.

10. How do I require an IP range instead of 1 IP? - Server Fault

    serverfault.com/questions/682490

    Require ip 10.1.0.0/255.255.0.0 A network a.b.c.d, and a netmask w.x.y.z. For more fine-grained subnet restriction. A network/nnn CIDR specification: Require ip 10.1.0.0/16 Similar to the previous case, except the netmask consists of nnn high-order 1 bits. Note that the last three examples above match exactly the same set of hosts.

11. What are the implications of expanding an internal subnet mask?

    serverfault.com/questions/53124

    So if you think you might have 254 devices on the network per area, bump it up to 255.255.252.0, the next subnet up. This will give you a host range of 192.168.0.1-192.168.3.254. Then when it becomes time to expand, the next range using the same subnet mask would be 192.168.4.1 to 192.168.7.254. A Simple Way: