Hi Pablo, > One customer site is having FTP NAT problems after migrating from 3.14 to 4.19. > The tcpdump traces look normal to me. Still IP addresses for passive FTP > don't get rewritten with 4.19, it instantly works with 3.14. > It works fine with 4.19 for me using test VMs. quick follow up: Everything is working out of the box in the kernel. I finally had access to the machine and the FTP conntrack helper was not set up correctly. Still it's good to have working debug code now. Cheers, Thomas