LDAP users authentication

[cristian.tod]

Hello,
I am trying to integrate a LDAP server in my OPNsense configuration.
I am running OPNsense on 6 hosts and I've setup VPN between all of them. Now I am trying to add a LDAP connection over over the VPN. By default the servers try to bind using the WAN interface and in this way the LDAP bind fails. I have the same issue when I try to add the firewall to a Zabbix serve
Is the any way to make the bind using the LAN interface?
Best regards!