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 ...

如上面的例子所示，每一个数据包都要通过三个内建的链(INPUT、OUTPUT和FORWARD)中的一个。 filter是最常用的表，上文所示设置所有的表规则的基本语法：iptables [-t table] command [match] [target]。 现实中，不一定要用到这里所列出的所有选项，也不一定是以这个顺序。

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 ...

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.

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 ...

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