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I have a dmz and there two nameserver and a mail server. Receiving mails on postfix works, but not sending. Everythime I try to send a mail with telnet, I get on the destination mail server an error, that the mail is rejected due to cannot find your reverse hostname [x.x.x.x]. The x.x.x.x address is the adress of the bridge from the isp, but there should be the public address from my mail server.

I added virtual ip interfaces for the public ip addresses and then a have firewall rules and nat port forwarding (forwarding dmz ip address to publich ip address).

How can I achieve that outgoing mail has its own public address and not the public address from the isp brdige?

Ok I found out that it is a WLAN problem. Once the first machine gets on WLAN connected, then all other are too conected. Is it possible to have connection request on mac address?

I want to setup the following setup for our family

Lan: 192.168.22.0/24

Access to all lan adresses is open
Access from some machines (server) is too open
Capture portal to acces internet
Access a) with a valid user connection
Access b) with a valid voucher

Under captur portal and connection I added an entry

Interface: LAN
Authentication using: Local database, voucher
Disabling Concurrent user logins
Allowed addresses: IP of servers

I created the voucher. Everthing works so far, with one exception. If the first login is successfully done, there is no any further login request, all other have free access to internet. As long as I understand it, there must be for every new connection a login request.