Yesterday, I noticed some really strange traffic coming from our mailserver. It was trying to connect to a loopback address (in the IANA space assigned for them, 127.0.0.0/8) on port 25. <BR><BR>I ...

Work is afoot to free up several internet protocol version 4 (IPv4) address ranges which have been unroutable as reserved, invalid or used for loopback networks since the 1980s. Seth Schoen, who ...

We just saw that the mask determines where the boundary between the network and host portions of the IP address lies. This boundary is important: If it is set too far to the right, there are lots of ...

Popular npm library netmask has a critical networking vulnerability. netmask is frequently used by hundreds of thousands of applications to parse IPv4 addresses and CIDR blocks or compare them. The ...