An issue with php/apache is causing apache not to start in FreeBSD. It segfaults and core dumps, logged in the /var/log/httpd/error_log.
Try removing –with-openssl from your configure.php file and recompile php.

cd /usr/local/directadmin/customapache
vi configure.php
#remove –with-openssl from the file, save, exit.
./build clean
./build php n

Possibly a mod_perl issue. Edit the /etc/httpd/conf/httpd.conf
change:

AddModule mod_perl.c

to

#AddModule mod_perl.c

and then restart apache. If you don’t have "AddModule mod_perl.c", then don’t worry about this entry.
Remove the "LoadModule perl_module /usr/lib/apache/mod_perl.so" if you have it as well.
This won’t affect files in the cgi-bin (I’ve seen very few people actually making use of mod_perl itself).
more info:
Previous workaround for the problem is to remove thp php flags from the httpd.conf files:

cd /usr/local/directadmin/data/templates
cp virtual_host*.conf custom
cd custom
perl -pi -e ’s/php_admin/#php_admin/’ *
echo "action=rewrite&value=httpd" >> /usr/local/directadmin/data/task.queue
/usr/local/directadmin/dataskq d
/usr/local/etc/rc.d/httpd restart

One user reported that installing zend solved this problem as well, so try:

cd /usr/local/directadmin/customapache
./build zend

Possibly have to downgrade zend to 2.5.7 from 2.6.2 as well as the zend binaries may not be backwards compatible.
To downgrade to apache 1.3.33 and php 4.3.11, run:

cd /usr/local/directadmin/customapache
./build clean
perl -pi -e ’s/1.3.34/1.3.33/’ build
perl -pi -e ’s/1.3.34/1.3.33/’ configure.apache_ssl
perl -pi -e ’s/2.8.25/2.8.24/’ build
perl -pi -e ’s/4.4.1/4.3.11/’ build
./build update_data
./build all d

edit:
/usr/local/lib/php.ini
Search for

; Maximum allowed size for uploaded files.
upload_max_filesize = 2M

Change the 2M to whatever new value you want, then restart apache.

If you need to go back to apache 1.3 after installing apache 2, you’ll need to do the following:
1) Restore the old httpd.conf file:

cp -f /etc/httpd/conf/httpd.conf.1.3.backup /etc/httpd/conf/httpd.conf

2) Get DirectAdmin to use the old httpd.conf files for the users. Edit the /usr/local/directadmin/conf/directadmin.conf file and change apache_ver=2.0 to apache_ver=1.3. Also, if you were using custombuild, and are going back to customapache, the apache_conf value needs to be reset to:

apacheconf=/etc/httpd/conf/httpd.conf

Then type

echo "action=rewrite&value=ips" >> /usr/local/directadmin/data/task.queue
echo "action=rewrite&value=httpd" >> /usr/local/directadmin/data/task.queue
echo "action=directadmin&value=restart" >> /usr/local/directadmin/data/task.queue

3) Now you can recompile apache 1.3

rm -f /usr/lib/apache/*
cd /usr/local/directadmin/customapache
./build clean
./build all

4) Fix the modules link:

cd /etc/httpd
rm -f modules
ln -s /usr/lib/apache modules

5) Restore the old boot script:
FreeBSD:

cp -f /usr/local/directadmin/customapache/httpd_freebsd /usr/local/etc/rc.d/httpd
chmod 755 /usr/local/etc/rc.d/httpd
/usr/local/etc/rc.d/httpd restart

RedHat:

cp -f /usr/local/directadmin/customapache/httpd /etc/init.d/httpd
chmod 755 /etc/init.d/httpd
/etc/init.d/httpd restart

Note this is an old guide. It was for apache 1.3 with customapache. The current boot script we provide shouldn’t have this issue.
If apache is not completely shutting down, consider trying graceful restarts (see related link below) and also ensure your system is updated such that you don’t have any outdated php scripts on the server.

---

[crit] (98)Address already in use: make_sock: could not bind to port 8090
or
[crit] (98)Address already in use: make_sock: could not bind to port 443
or
[crit] (98)Address already in use: make_sock: could not bind to port 80
If you see this error in your /var/log/httpd/error_log, it would mean that apache isn’t shutting down completely before trying to restart. This means that the new process won’t be able to bind to the given ports because they’re still being used by the old copy of apache that wasn’t completely shut down.
To solve this, use a different boot script that will wait for all apache processes to stop before starting the new one:

cd /usr/local/directadmin/customapache
rm -f httpd*
./build update

Once you have the new scripts downloaded, you need to install them:
RedHat:

cp httpd /etc/init.d/httpd
chmod 755 /etc/init.d/httpd
chkconfig httpd reset

FreeBSD:

cp httpd_freebsd /usr/local/etc/rc.d/httpd
chmod 755 /usr/local/etc/rc.d/httpd

If you want to list all files in a directory that doesn’t use an index.html (or index.php) file, you can create an .htaccess file with the following contents:

Options +Indexes

This will tell apache that you want to list all files in the directory.