create verify availability in pbr route and check. route-map wh-route permit 100      set ip next-hop verify-availability x.x.x.x1 track 1 thx, MJ

Hi Ronald, As my understanding you have a two ISP. A subnet user goes via ISP 1 and B subnet goes ISP 2. you configured PBR route for A subnet in mapped with ISP1. Let me know ISP1&ISP2 routing priority. thx, MJ

Hi Tom, System and domain name is required to resolve the reverse dns create reverse dns lookup in your DNS server and test it again Thankyou, MJ,  

yes you can use but kindly check with your ISP provider whether your LAN IP pool address visible from outside.