MX450 WAN IP is Address of Proxy

[Netwow]

Our MX450 WAN IP is different than our uplink public IP . WAN IP is the address of our proxy server. We are using a static NAT on our FW upstream from the MX. 

Why would the WAN IP be different from the public uplink ?

[ww]

are you sure its not configured to use proxy on the local status page

[Netwow]

I am remote from the MX450 so I cannot check the local status page but I am 99% sure. 

[PhilipDAth · Accepted solution]

Perhaps something upstream is doing policy routing, and routing the requests via an alternative circuit and NATing it.