I've setup a mail gateway 5.0-71 solution with a nginx reverse proxy one the same machine (using let's encrypt certificates). Everything works. Now I want to setup fail2ban to add a security layer (web GUI is currently reachable via Internet). Problem: In every logfile (daemon.log, syslog, pmgproxy.log) there is only 127.0.0.1 as source ip listed. Is there a way to log the real client ip? Thanks for any help in advance.