I have a server -running Fedora Core release 1 (Yarrow), if that matters- that I have enabled virtual NICs, only one; that is, the actual IP, plus an extra one. The NIC works fine, it starts ...

I posted a topic about my firewall script a few days ago and got a ton of help. Instead of reviving that topic, I decided to start a new one. <BR><BR>I'm trying to learn iptables firewalling and I ...

Dear readers, I appear to have set a Paranoid Penguin record—six months spent on one article series. (It has consisted of five installments, with a one-month break between the second and third pieces.

Iptables, more properly referred to as “iptables/netfilter” because of the two modules that are involved — the userspace module “iptables” and the kernel ...

I've been writing a multipart series on building a transparent (bridging) firewall using Linux. Specifically, I'm using the distribution OpenWrt running on a Linksys WRT54GL broadband router, a ...

While there are a lot of ways to achieve this, I prefer using the 'post-up' method. To be able to use this method, we first need to make the script executable. This is done by chmoding it to '700', so ...