Previously, we had 2 firewalls because Filezilla ftp service cannot coexist with the other firewall. We recently received a new firewall and was planning to use just one firewall but it doesn't look like it will work this way. Sonicwall solution was 2 firewalls.
We use Filezilla for passive mode FTP and the firewall settings in the Sonicwall Dynamic Ports for FTP Transformation is set to IKE (Key Exchange). Our AS400 server must be set to FTP for the FTP Transformation otherwise it cannot access it. I thought if I created an service group that include both IKE (Key Exchange) and FTP, it will allow me to use both, but it doesn't. Filezilla will still get a 550 error. Can this be done or do I need to revert back to 2 firewalls?
The fix:
Basically, the problem was both FTP servers cannot be used on the same firewall with the same port....