When deciding on a firewall implementation, most Unix-savvy administrators have usually chosen to use ipfilter on OpenBSD for their combination of capabilities and stability, as the capabilities of ...

Linux's iptables allows powerful firewalls to be implemented at a minute fraction of the cost of many commercial offerings. Basic iptables firewalls are packet filters, which means they inspect the ...

I have been trying to implement a packet sniffer on QNX to read outgoing UDP packets for a software unit test. As far as I am aware, it isn't possible to create a raw socket and set it promiscuous ...

For those of you who have taken the plunge and upgraded from kernel 2.2.X (or even 2.0.X) to 2.4.X, congratulations. If, like a number of folks, you're running some form of firewall using either ...

The latest version of the Linux kernel cleans out nearly 100K lines of code, adds file encryption and the Berkeley Packet Filter, plus makes a nod to gamers and mobile devices. The recent release of ...

I have noticed something curious that I could use some help explaining. I decided to add some logging rules to the firewall on one of my web servers and have noticed about 8 or 9 packets per minute ...