Webserver configuration

The extension modifies the links that are outputed by the forum. So you need to rewrite the new links to working URLs.

Apache

Open your .htacces and find RewriteEngine on right after this add the following code:

RewriteBase /
RewriteRule ^(.*)-f([0-9]*)/mcp.php(.*) mcp.php?%{QUERY_STRING} [L,R=301]
RewriteRule ^(.*)-f([0-9]*)/(.*)-t([0-9]*)-s([0-9]*).html viewtopic.php?f=$2&t=$4&start=$5&%{QUERY_STRING} [L]
RewriteRule ^(.*)-f([0-9]*)/(.*)-t([0-9]*).html viewtopic.php?f=$2&t=$4&%{QUERY_STRING} [L]
RewriteRule ^(.*)-f([0-9]*)/index-s([0-9]*).html viewforum.php?f=$2&start=$3&%{QUERY_STRING} [L]
RewriteRule ^(.*)-f([0-9]*)/ viewforum.php?f=$2&%{QUERY_STRING} [L]
RewriteRule ^(.*)-f([0-9]*) viewforum.php?f=$2&%{QUERY_STRING} [L]

If your forum is under domain.tld/forum you also need to change RewriteBase / to RewriteBase /forum

ngnix

Open your /etc/nginx/nginx.conf and add the following code to your VHost configuration.

location / {
	rewrite ^/(.*)-f([0-9]*)/mcp.php(.*) mcp.php?$query_string;
	rewrite ^/(.*)-f([0-9]*)/(.*)-t([0-9]*)-s([0-9]*).html /viewtopic.php?f=$2&t=$4&start=$5&$query_string last;
	rewrite ^/(.*)-f([0-9]*)/(.*)-t([0-9]*).html /viewtopic.php?f=$2&t=$4&$query_string last;
	rewrite ^/(.*)-f([0-9]*)/index-s([0-9]*).html /viewforum.php?f=$2&start=$3&$query_string last;
	rewrite ^/(.*)-f([0-9]*)/ /viewforum.php?f=$2&$query_string last;
	rewrite ^/(.*)-f([0-9]*) /viewforum.php?f=$2&$query_string last;
}

Lighttpd

Open your /etc/lighttpd/lighttpd.conf and add the following code to your VHost configuration.

url.rewrite-once = (
	"/(.*)-f([0-9]*)/(.*)-t([0-9]*)-s([0-9]*).html(\?(.*))?"	=> "/viewtopic.php?f=$2&t=$4&start=$5&$7",
	"/(.*)-f([0-9]*)/(.*)-t([0-9]*).html(\?(.*))?"				=> "/viewtopic.php?f=$2&t=$4&$6",
	"/(.*)-f([0-9]*)/index-s([0-9]*).html(\?(.*))?"				=> "/viewforum.php?f=$2&start=$3&$5",
	"/(.*)-f([0-9]*)/(\?(.*))?"									=> "/viewforum.php?f=$2&$4",
)

Caddy Webserver

Open your Caddyfile and add the following code to your VHost configuration.

rewrite {
		regexp /(.*)-f([0-9]*)/(.*)-t([0-9]*)-s([0-9]*).html(\?(.*))?
		to /viewtopic.php?f={2}&t={4}&start={5}&{7}
}
rewrite {
		regexp /(.*)-f([0-9]*)/(.*)-t([0-9]*).html(\?(.*))?
		to /viewtopic.php?f={2}&t={4}&{6}
}
rewrite {
		regexp /(.*)-f([0-9]*)/index-s([0-9]*).html(\?(.*))?
		to /viewforum.php?f={2}&start=${3}&{5}
}
rewrite {
		regexp /(.*)-f([0-9]*)/(\?(.*))?
		to /viewforum.php?f={2}&{4}
}