diff --git a/blockauth b/blockauth
index 67bca5d..ccdf28e 100755
--- a/blockauth
+++ b/blockauth
@@ -78,8 +78,27 @@ else
   echo "always_ip_allowed=\"192.168.0.1 192.168.0.2\"" >> /etc/blockauth/blockauth.conf
   echo "blocklist=\"/etc/blockauth/blocklist.list\"" >> /etc/blockauth/blockauth.conf
   echo "filelog=\"/etc/blockauth/blockauth.log\"" >> /etc/blockauth/blockauth.conf
+  echo "max_ip_blocklist=\"12500\"" >> /etc/blockauth/blockauth.conf
 fi
 
+# Check integrity of configuration file
+if [ -z "${valid_users}" ] ; then
+  echo "valid_users=\"test1 test2\"" >> /etc/blockauth/blockauth.conf
+fi
+if [ -z "${always_ip_allowed}" ] ; then
+  echo "always_ip_allowed=\"192.168.0.1 192.168.0.2\"" >> /etc/blockauth/blockauth.conf
+fi
+if [ -z "${blocklist}" ] ; then
+  echo "blocklist=\"/etc/blockauth/blocklist.list\"" >> /etc/blockauth/blockauth.conf
+fi
+if [ -z "${filelog}" ] ; then
+  echo "filelog=\"/etc/blockauth/blockauth.log\"" >> /etc/blockauth/blockauth.conf
+fi
+if [ -z "${max_ip_blocklist}" ] ; then
+  echo "max_ip_blocklist=\"12500\"" >> /etc/blockauth/blockauth.conf
+fi
+source /etc/blockauth/blockauth.conf
+
 echo "blockauth: running process"
 blockauth=0
 while [ ${blockauth} -eq 0 ] ; do