diff --git a/dhparam-openssl-3.0-4096.pem b/dhparam-openssl-3.0-4096.pem
new file mode 100644
index 0000000..18d9e2a
--- /dev/null
+++ b/dhparam-openssl-3.0-4096.pem
@@ -0,0 +1,13 @@
+-----BEGIN DH PARAMETERS-----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=
+-----END DH PARAMETERS-----
diff --git a/install_httpd-2.4.sh b/install_httpd-2.4.sh
index 1c1a9a7..95c017f 100755
--- a/install_httpd-2.4.sh
+++ b/install_httpd-2.4.sh
@@ -1264,9 +1264,9 @@ else
    fi
 
    echo "" >> ${_logdir}/main.log
-   echo "chown -R root.root apr-$APR_VERSION" >> ${_logdir}/main.log
+   echo "chown -R root:root apr-$APR_VERSION" >> ${_logdir}/main.log
    echo "" >> ${_logdir}/main.log
-   chown -R root.root apr-$APR_VERSION || fatal "Changing permissions of \"apr-$APR_VERSION\" failed"
+   chown -R root:root apr-$APR_VERSION || fatal "Changing permissions of \"apr-$APR_VERSION\" failed"
 
    ## - build and install apr
    ## -
@@ -1421,9 +1421,9 @@ else
 
 
    echo ""  >> ${_logdir}/main.log
-   echo "chown -R root.root apr-util-$APR_UTIL_VERSION"  >> ${_logdir}/main.log
+   echo "chown -R root:root apr-util-$APR_UTIL_VERSION"  >> ${_logdir}/main.log
    echo ""  >> ${_logdir}/main.log
-   chown -R root.root apr-util-$APR_UTIL_VERSION || fatal "Changing permissions of \"apr-util-$APR_UTIL_VERSION\" failed."
+   chown -R root:root apr-util-$APR_UTIL_VERSION || fatal "Changing permissions of \"apr-util-$APR_UTIL_VERSION\" failed."
 
    ## - build and install apr-util
    ## -
@@ -1582,9 +1582,9 @@ fi
 
 
 echo "" >> ${_logdir}/main.log
-echo "chown -R root.root httpd-$APACHE_VERSION" >> ${_logdir}/main.log
+echo "chown -R root:root httpd-$APACHE_VERSION" >> ${_logdir}/main.log
 echo "" >> ${_logdir}/main.log
-chown -R root.root httpd-$APACHE_VERSION || fatal "Changing permissions of \"httpd-$APACHE_VERSION\" failed."
+chown -R root:root httpd-$APACHE_VERSION || fatal "Changing permissions of \"httpd-$APACHE_VERSION\" failed."
 
 
 if [ "httpd-$APACHE_VERSION" != "`basename $_builddir`" ]; then
@@ -2275,16 +2275,45 @@ else
 fi
 
 echo "" >> ${_logdir}/main.log
-echo "## - Generate a dhparam.pem file .." >> ${_logdir}/main.log
-echo "## -" >> ${_logdir}/main.log
-echo "openssl dhparam -dsaparam -out $PREFIX/conf/ssl/dhparam.pem 4096" >> ${_logdir}/main.log
-echononl "\tGenerate a dhparam.pem file.."
-openssl dhparam -dsaparam -out $PREFIX/conf/ssl/dhparam.pem 4096 >> ${_logdir}/main.log 2>&1
-if [ "0" = "$?" ];then
-   echo_ok
+if [[ "$os_dist" = "debian" ]] && [[ $os_version -gt 11 ]]; then
+
+   if [[ -f "dhparam-openssl-3.0-4096.pem" ]] ; then
+      echo "## - Copy dhparam.pem to '$PREFIX/conf/ssl/dhparam.pem'.." >> ${_logdir}/main.log
+      echo "## -" >> ${_logdir}/main.log
+      echo "cp \"${_builddir}/dhparam-openssl-3.0-4096.pem\" \"$PREFIX/conf/ssl/dhparam.pem\""
+      cp "${_builddir}/dhparam-openssl-3.0-4096.pem" "$PREFIX/conf/ssl/dhparam.pem" >> ${_logdir}/main.log
+      if [[ $? -eq 0 ]];then
+         echo_ok
+      else
+         echo_failed
+         warn " Copiing 'dhparam-openssl-3.0-4096.pem' to '$PREFIX/conf/ssl/dhparam.pem' failed"
+      fi
+   else
+      warn "Generating dhparam.pem file may take a very long time."
+      echo "## - Generate a dhparam.pem file .." >> ${_logdir}/main.log
+      echo "## -" >> ${_logdir}/main.log
+      echo "openssl dhparam -out $PREFIX/conf/ssl/dhparam.pem 4096" >> ${_logdir}/main.log
+      echononl "\tGenerate a dhparam.pem file.."
+      openssl dhparam -out $PREFIX/conf/ssl/dhparam.pem 4096 >> ${_logdir}/main.log 2>&1
+      if [[ $? -eq 0 ]];then
+         echo_ok
+      else
+         echo_failed
+         warn " Generating dhparam.pem file '$PREFIX/conf/ssl/dhparam.pem' failed"
+      fi
+   fi
 else
-   echo_failed
-   warn " Generating dhparam.pem file '$PREFIX/conf/ssl/dhparam.pem' failed"
+   echo "## - Generate a dhparam.pem file .." >> ${_logdir}/main.log
+   echo "## -" >> ${_logdir}/main.log
+   echo "openssl dhparam -dsaparam -out $PREFIX/conf/ssl/dhparam.pem 4096" >> ${_logdir}/main.log
+   echononl "\tGenerate a dhparam.pem file.."
+   openssl dhparam -dsaparam -out $PREFIX/conf/ssl/dhparam.pem 4096 >> ${_logdir}/main.log 2>&1
+   if [[ $? -eq 0 ]];then
+      echo_ok
+   else
+      echo_failed
+      warn " Generating dhparam.pem file '$PREFIX/conf/ssl/dhparam.pem' failed"
+   fi
 fi
 
 
@@ -3262,9 +3291,9 @@ if $WITH_MOD_FCGID ; then
    fi
 
    echo ""  >> ${_logdir}/main.log
-   echo "chown -R root.root mod_fcgid-${MOD_FCGID_VERSION}" >> ${_logdir}/main.log
+   echo "chown -R root:root mod_fcgid-${MOD_FCGID_VERSION}" >> ${_logdir}/main.log
    echo ""  >> ${_logdir}/main.log
-   chown -R root.root mod_fcgid-${MOD_FCGID_VERSION} || fatal "Changing permissions of \"mod_fcgid-${MOD_FCGID_VERSION}\" failed"
+   chown -R root:root mod_fcgid-${MOD_FCGID_VERSION} || fatal "Changing permissions of \"mod_fcgid-${MOD_FCGID_VERSION}\" failed"
 
    echo "" >> ${_logdir}/main.log
    echo "## - Rename mod_fcgid-${MOD_FCGID_VERSION} to `basename $_builddir_fcgid` .." >> ${_logdir}/main.log
@@ -3447,9 +3476,9 @@ if $WITH_MOD_PERL ; then
    fi
 
    echo ""  >> ${_logdir}/main.log
-   echo "chown -R root.root mod_perl-${MOD_PERL_VERSION}" >> ${_logdir}/main.log
+   echo "chown -R root:root mod_perl-${MOD_PERL_VERSION}" >> ${_logdir}/main.log
    echo ""  >> ${_logdir}/main.log
-   chown -R root.root mod_perl-${MOD_PERL_VERSION} || fatal "Changing permissions of \"mod_perl-${MOD_PERL_VERSION}\" failed"
+   chown -R root:root mod_perl-${MOD_PERL_VERSION} || fatal "Changing permissions of \"mod_perl-${MOD_PERL_VERSION}\" failed"
 
    echo "" >> ${_logdir}/main.log
    echo "## - Rename mod_perl-${MOD_PERL_VERSION} to `basename $_builddir_perl` .." >> ${_logdir}/main.log