Ars Technica

IPsec strongSwan tunnels on local subnet - use local subnet ip address over tunnel?

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 ...
TechRepublic

Expand your network by supernetting IP addresses

If you're looking to segment a TCP/IP network, subnetting is not your only option. CIDR, or supernetting, is another way to accomplish the task and offers some unique solutions. Here's how to use ...
TV Technology

Subnetting for the Broadcast, Video and Audio Systems Engineer, Part V

The last edition of this column talked about subnets and introduced folding paper as an illustration of how subnets can be understood. This will be very useful as we proceed. MORE IPv4 SUBNETTING ...
Ars Technica

Counting IP addresses in a subnet using Excel?

I was trying to figure out how to do this myself, but then I thought "hey, I bet some Arsian has done this." <BR><BR>I have a spreadsheet with a bunch of IP addresses in a single column. I'd like to ...
Network World

DHCP defined and how it works

If Dynamic Host Configuration Protocol (DHCP) didn’t exist, network administrators would have to manually parcel out IP addresses from the available pool, which ...