A BIG-IP has a virtual server at 150.150.10.10:80 with SNAT automap configured. This BIG-IP also has a SNAT at 150.150.10.11 set for a source address range of 200.200.1.0 / 255.255.255.0. All other…

The source IP would be translated because both a specific SNAT object and SNAT automap are configured, ensuring the client IP is not preserved.

150.150.10.11 is the identifier for the specific SNAT, but the actual source IP used for outbound connections by such a SNAT, unless a SNAT pool is explicitly defined, is the floating self-IP of the egress VLAN.

Although the virtual server has SNAT automap, a specific SNAT object is also configured to match the client's source IP (200.200.1.1). Specific SNAT configurations take precedence over SNAT automap, and when a specific SNAT object is used without an explicit SNAT pool, it typically translates the source IP to the floating self-IP address of the VLAN through which the packet exits the BIG-IP system.

The source IP used for translation is determined by where the packet leaves the system (egress VLAN), not where it arrives (ingress VLAN).