I used the instructions for configuring a Simple stateful firewall which seemed to work well aside from a couple of minor edits to get the rules accepted. I then used Shields Up, connecting my machine directly to the cable company's modem to remove the router effect. Shields Up seemed generally happy although it criticised the policy for ping requests. I guess it would prefer the policy which the instructions say to use only for educational purposes. Also, it rather weirdly set a bunch of cookies even though the site claims not to use them. And it pointed out that my ISP is enabling the world to track us via a unique computer/ip name - but that's not the fault of the iptables config. I did not test the rules for ipv6 as it is disabled right now. I'm not sure how useful Shields Up tests are for Linux as the site seems primarily designed to expose vulnerabilities in Windows... --Margali 22:11, 29 December 2011 (EST)
I did some sprucing up overall on the beginning of the article. I found it prudent to make a beginning section of tutorials and guides, and add some text about iptables to the introduction. I also added a short synopsis using some random links already prsent from a random "also see" section ato the beginning of the iptables front-end section. I'm also going to add a link to the Absolute Beginners Guide to here, as I feel my changes will make this article more intelligible to newbies.