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 ...

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 ...

Global Unicast Addressing, Routing, and Subnetting: This section introduces the concepts behind unicast IPv6 addresses, IPv6 routing, and subnetting using IPv6, all in comparison to IPv4. IPv6 ...

The bits in the mask identify both hosts and subnets. The more hosts, the fewer subnets; the more subnets, the fewer hosts can be individually addressed. These bits become a tradeoff based on the ...

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 ...

If you have ever needed to survey a large group of systems to find out which of them supported some particular service, such as ftp, telnet, ssh or some other particular application, you have probably ...

Ryan is a tech/science writer, skeptic, lover of all things electronic, and Android fan. In his spare time he reads golden-age sci-fi and sleeps, but rarely at the same time. His wife tolerates him as ...

Does a static IP address make file transfers go faster than using DHCP IP addresses? No, Dr. Internet says. Did you really mean to say, in an earlier column, that using a static IP address will make ...