The netfilter/iptables project has been granted a preliminary injunction against Sitecom Germany GmbH for not fulfilling the obligations imposed by the GNU General Public License (which covers the netfilter/iptables code used) - Sitecom did not make the source code available nor did they include the GPL license with their products (GPL is viral). Read the press release from the netfilter project for more details.
Reading the comments here and here had me wondering why people were so surprised by the decision made by the (German) judge. I'd think that the judge would have looked over the GPL and applied the law in accordance with it and copyright law. An anonymous commentor at Groklaw probably said this best.