PHP Bulletin Board (phpBB) is a popular Internet forum package written in the PHP programming language. It is free software released under GNU GPL Public License.

phpBB supports mods. These are code modifications created by the phpBB community. For search engine optimization you will find MOD here.

However this mod is Apache specific. To run phpBB SEO MOD under Lighttpd web server you need to make modification.

Procedure

First download and apply phpBB SEO MOD by visiting this url.

Open your lighttpd configuration
# vi /etc/lighttpd/lighttpd.conf

Find out your virtual host (domain) specific configuration and append the rules as follows:
url.rewrite = (
"^.+-vc([0-9]+)\.html$" => "/index.php?c=$1",
"^.+-vf([0-9]+)-([0-9]+)\.html$" => "/viewforum.php?f=$1&start=$2",
"^.+-vf([0-9]+)\.html$" => "/viewforum.php?f=$1",
"^.+-vt([0-9]+)-([0-9]+)\.html$" => "/viewtopic.php?t=$1&start=$2",
"^.+-vt([0-9]+)\.html$" => "/viewtopic.php?t=$1",
"^.+-vt([0-9]+)\.html\?highlight=.*" => "/viewtopic.php?t=$1&highlight=$2",
"^/post([0-9]+)\.html$" => "/viewtopic.php?p=$1",
"^/member([0-9]+)\.html$" => "/profile.php?mode=viewprofile&u=$1"
)

Note: You must change / with your real phpBB installation folder or with nothing if it’s installed in the webroot /.

Save and close the change. Restart lighttpd webserver:
# /etc/init.d/lighttpd restart

If you are applying mx Google Sitemaps mod add following mod_rewrite rules to above ruleset:
"/sitemaps.xml" => "/sitemap.php",
"/forum-sitemap-([0-9]+).xml" => "/sitemap.php?fid=$1",
"/sitemap-forum.xml$" => "/sitemap.php?forum"


Save and close the file.