public lan ip to show in place of wan ip

Hello,

I've got this edgerouter lite that has a lan of 222.245.90.57 255.255.255.248 and wan 111.158.21.26 255.255.255.252 
I want to get it set up so that 222.245.90.58 shows as the wan ip if I google 'what's my ip?'

Thanks,

Brendon