NethServer 6

I have done this modification to the script to support this feature, by simply defining a prop per openvpn.
I already tested it and it's working: if the prop is defined the client will receive the defined remote, if not it will receive the hostname as usual.

This is the little modification:

[root@ts ~]# diff -u /usr/libexec/nethserver/openvpn-local-client.ori /usr/libexec/nethserver/openvpn-local-client
--- /usr/libexec/nethserver/openvpn-local-client.ori    2015-08-27 18:01:52.000000000 +0200
+++ /usr/libexec/nethserver/openvpn-local-client    2015-10-21 15:00:03.922377340 +0200
@@ -31,7 +31,11 @@
 }

 $OUT .= "client\n";
-$OUT .= "remote $SystemName.$DomainName\n";
+if ($openvpn->prop('Remote')) {
+    $OUT .= "remote ".$openvpn->prop('Remote')."\n";
+}else{
+    $OUT .= "remote $SystemName.$DomainName\n";
+}
 $OUT .= "port ".$openvpn->prop('UDPPort')."\n";
 $OUT .= "float\n";

now if you want to forse a specific remote just declare it as a standard prop:

config setprop openvpn Remote IP_ADDRESS_PUBLIC_NAME

System and Package Version installed

Package Installed: nethserver-openvpn-1.2.4-1.2.gff92071.ns6.noarch
Other Package installed: nethserver-vpn-1.1.7-1.ns6.noarch.rpm

Test Original Problem
New UI field "Contact this server on public IP / host" under VPN > OpenVPN tab

Install Updated Package

yum --enablerepo=nethserver-testing install nethserver-openvpn-1.2.4-1.2.gff92071.ns6.noarch

Test Results after update
The downloaded OpenVPN client configuration contains the expanded list of "Contact this server on public IP / host". Tested with IP, host name single multiple and empty.

Verified Or Reopen
VERIFIED

Note
Fixed UI label and added online help