It looks like the cdrkit web site has been down for a while. Point to the debian package instead, or maybe delete altogether?
Rob Index: faq4.html =================================================================== RCS file: /cvs/www/faq/faq4.html,v retrieving revision 1.439 diff -u -p -r1.439 faq4.html --- faq4.html 1 Apr 2016 15:25:47 -0000 1.439 +++ faq4.html 2 Apr 2016 14:15:51 -0000 @@ -266,7 +266,7 @@ In OpenBSD, you can create a CD from an Modern Windows and Macintosh systems can directly create CDs from ISO images. On Linux or other Unix-like systems, use applications such as -<a href="http://www.cdrkit.org/">cdrkit</a>. +<a href="https://packages.debian.org/source/sid/cdrkit">cdrkit</a>. <h3 id="MkFlop">4.3.3 - Floppies</h3>