Troubleshooting Tip: How to fix error 'Conflicts with gateway IP address' when adding Source NAT IP

[Khidzir_MN]

Description	This article describes how to fix the error 'Conflicts with gateway IP address' when adding a Source NAT IP in the Network NAT or the Virtual Server NAT.
Scope	FortiADC, FortiADC-VM
Solution	FortiADC will prompt the error if the NAT IP is the same as one of the Link Load Balance's Gateway IP. Go under Network -> NAT -> Source. Go under Server Load Balance -> Virtual Server -> NAT Source Pool This is currently the expected behavior. Using the gateway IP as the Source NAT IP may cause the return traffic to be misrouted or dropped, as the network devices might not distinguish between traffic destined for the gateway and traffic originating from it (from FortiADC). Use a different IP from the Link Load Balance's Gateway IP to avoid the error. Related documents: Configuring source NAT - FortiADC 7.4.7 handbook Configuring gateway links - FortiADC 7.4.7 handbook