Configure Destination NAT with DNS Rewrite
Create a destination NAT policy rule for static translation that also rewrites the IPv4 address in a DNS response based on the original or translated destination address of the NAT rule.
Beginning with PAN-OS 9.0.2 and in later 9.0 releases, when you configure a destination NAT policy rule that performs static translation of IPv4 addresses, you can also configure the rule so that the firewall rewrites the IPv4 address in a DNS response based on the original or translated IP address configured for the rule. The firewall performs NAT on the IPv4 address (the FQDN resolution) in a DNS response (that matches the rule) before forwarding the response to the client; thus, the client receives the appropriate address to reach the destination service.
View the DNS rewrite use cases to help you determine whether to specify that the rewrite occur in the
You cannot enable
Bi-directionalsource address translation in the same NAT rule where you enable DNS rewrite.
- Create a destination NAT policy rule that specifies the firewall perform static translation of IPv4 addresses that match the rule, and also specifies the firewall rewrite IP addresses in DNS responses when that IPv4 address (from the A Record) matches the original or translated destination address in the NAT rule.
- SelectandPoliciesNATAdda NAT policy rule.
- (Optional) On theGeneraltab, enter a descriptiveNamefor the rule.
- ForNAT Type, selectipv4.
- On theOriginal Packettab,AddaDestination Address.You will also have to select a Source Zone orAnysource zone, but DNS rewrite occurs at the global level; only the Destination Address on the Original Packet tab is matched. DNS Rewrite ignores all other fields on the Original Packet tab.
- On theTranslated Packettab, for Destination Address Translation, selectTranslation Typeto beStatic IP.
- Select aTranslated Addressor enter a new address.
- Enable DNS Rewriteand select aDirection:
- Selectreverse(default) when the IP address in the DNS response requires the opposite translation that the NAT rule specifies. If the DNS response matches theTranslatedDestination Address in the rule, translate the DNS response using the reverse translation that the rule uses. For example, if the rule translates IP address 18.104.22.168 to 192.168.1.10, the firewall rewrites a DNS response of 192.168.1.10 to 22.214.171.124.
- Selectforwardwhen the IP address in the DNS response requires the same translation that the NAT rule specifies. If the DNS response matches theOriginalDestination Address in the rule, translate the DNS response using the same translation the rule uses. For example, if the rule translates IP address 126.96.36.199 to 192.168.1.10, the firewall rewrites a DNS response of 188.8.131.52 to 192.168.1.10.
- Commityour changes.
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