If you want to see real client IPs, you probably don't want NAT. Because it's what NAT does, it changes addresses. In any case, if it changes source address, it's done in srcnat chain, so check what exactly you have there, or post it here and add some more details what exactly you expect to happen.
Hi Sob,
Thank you very much for the Reply. Some more details about my problem. In our network we have an Apache Reverse Proxy, and when somebody connects to it locally (connected through Wifi on a Mikrotik router), the Mikrotik Router IP address (192.168.1.101) on the Reverse Proxy is displayed, instead of the Client local IP (192.168.1.54 for example). Not sure if the problem is in the Mikrotik acting as a local Wifi Router, or in the Mikrotik where the Apache Reverse Proxy server is connected, but I guess it should be in the local Wifi Router most probably. What we need is to have in the Apache logs the real Client IP address, and not the Mikrotik Gateway Router.
On the Mikrotik Wifi Router, in Firewall Nat I have only 1 rule set, chain=srcnat and Action=masquerade. Maybe the action should be changed, and instead of masquerade to have action=same or any else?
Thank you