Perl is required to install and use Vipul's Razor. This will already be installed as SpamAssassin uses it. A C compiler is also required, except on Debian Linux, for which a binary package is available.
To operate, Razor requires a constant internet connection. The Razor communication uses TCP port 2703, and Razor also uses TCP pings on port 7 to determine which servers are closest, so firewalls will have to be configured to enable these ports.
There are no mainstream RPM packages available for Razor. However, Razor is available in Gentoo and Debian Linux. To install in Gentoo, use the
emerge razor command, and to install in Debian, use
apt-get razor. On other Linux distributions and UNIX variants it can be installed ...