This feature is available for Standard and
Premium accounts only.
The Firewall's Advanced Settings mode lets you manipulate DNAT, SNAT, and Filter rules directly. DNAT rules can manipulate the destination address and port of a packet; similarly SNAT rules can manipulate the source address and port of a packet.
Filter rules apply an ACCEPT, REJECT, DROP, or LOG action to a packet. A DNAT or SNAT rule with the same name as a Forwarding rule will be associated under Normal Settings for Port Forwarding/NAT rules.
For advanced firewall configuration:
On a device's Device Files tab, click Use As a Template for New Config and then click Firewall in the left navigation menu.
Click Advanced in the upper right of the Firewall section.
To add a prerouting (DNAT) rule to your firewall, click Add DNAT Rule.
To add Forward Filter Rules, Input Filter Rules, or Output Filter Rules, click Add rules for that rule type.
To add postrouting (SNAT) rule to your firewall, click Add SNAT Rule.
Enter settings and click Save As. See Related topics for details on each rule type.