Resolved! ASA 5520 - Can not change default route.
HiMy asa is sitting behind a router the next hop from the ASA to the router is 10.0.0.5 I have tried to change the default route to route DMZ 0 0 10.0.0.5 to no availability right now the default route is (S* 0.0.0.0 0.0.0.0 [1/0] via 172.16.8.20,...