# as root, install prerequisite Berkeley DB 4.6 (not 4.7!)
cd /usr/ports/database/db46
make
make install
sync
rehash

# /tmp sometimes fills up on large builds.
# find a suitable directory to build squidGuard:
mkdir /usr/compile
chmod 1777 /usr/compile   #same permissions as /tmp, optional
cd /usr/compile

# download squidGuard tarball
fetch http://www.squidguard.org/Downloads/squidGuard-1.4.tar.gz
tar zxvf squidGuard-1.4.tar.gz
cd squidGuard-1.4

# configure needs explicit options, because the FreeBSD ports build of DB
puts
# things where squidGuard does not expect them to be:
../configure --with-db=/usr/local/bin/db46
--with-db-inc=/usr/local/include/db46
--with-db-lib=/usr/local/lib/db46
make
make install

[...]

"Congratulation. SquidGuard is sucessfully installed."

Everything appears to have installed in /usr/local/squidGuard