When staring apache, you get an error similar to:
Starting httpd: Syntax error on line 12 of /usr/local/directadmin/data/users/username/httpd.conf:
Port was replaced with Listen in Apache 2.0
apache_ver=2.0
1) Add apache_ver=2.0 to your directadmin.conf (do not add apache_ver=2.2, always use 2.0 for apache 2.x)
2) Ensure it's set correctly, type:
cd /usr/local/directadmin
./directadmin c | grep apache_ver
3) Once set, restart DA and rewrite the configs:
cd /usr/local/directadmin
killall -9 directadmin
./directadmin d
cd custombuild
./build rewrite_confs