my employer is running out of (private) IP addresses. Because there were some rather bad decisions made during the set up of the network (like using the 129.122.0.0/16 subnet....) I do not want to add ...

To understand how subnetting works, you first must have a good basic understanding of IP addresses. An IP address is set of binary octets broken into quads. That definition may not have made any sense ...

I am using a strongSwan IPSec gateway for Windows 7 and Server 2008 based clients on the same subnet. The Windows VPN client requires a virtual ip address to be assigned by the IPsec gateway. What I ...

For one to be able to create multiple logical networks within a Class A, B, or C network, one needs to know the principle of subnet. Without using subnets, one could only use a single network no ...

We found several utilities to help calculate IP subnets, subnet ranges, and CIDR addressing. IP Subnet Calculator (free) is a good, basic subnet calculator that shows available subnets based on IP ...

In the last two articles, we talked about IPv4 basics (Part IV) (Part V). We introduced the concept of folding a sheet of paper to understand subnetting. Each fold of the paper is a bit borrowed from ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. One of the most prevalent problems with IP networks occurs when IP subnet masks are incorrect.

This is the first of many technical blog posts I’m going to post on IPv6 architecture and implementation for a Microsoft Windows-based environment. I started off with a basic introduction of the IPv4 ...