diff --git a/cmd/admin-handlers_test.go b/cmd/admin-handlers_test.go
index dd1d85664..10af25d72 100644
--- a/cmd/admin-handlers_test.go
+++ b/cmd/admin-handlers_test.go
@@ -277,7 +277,7 @@ func prepareAdminXLTestBed() (*adminXLTestBed, error) {
 
 	// Setup admin mgmt REST API handlers.
 	adminRouter := mux.NewRouter()
-	registerAdminRouter(adminRouter)
+	registerAdminRouter(adminRouter, true)
 
 	return &adminXLTestBed{
 		xlDirs:   xlDirs,
diff --git a/cmd/admin-router.go b/cmd/admin-router.go
index 4657bbccb..7f6562780 100644
--- a/cmd/admin-router.go
+++ b/cmd/admin-router.go
@@ -31,7 +31,7 @@ type adminAPIHandlers struct {
 }
 
 // registerAdminRouter - Add handler functions for each service REST API routes.
-func registerAdminRouter(router *mux.Router) {
+func registerAdminRouter(router *mux.Router, enableIAM bool) {
 
 	adminAPI := adminAPIHandlers{}
 	// Admin router
@@ -69,42 +69,44 @@ func registerAdminRouter(router *mux.Router) {
 
 	/// Config operations
 
-	// Update credentials
-	adminV1Router.Methods(http.MethodPut).Path("/config/credential").HandlerFunc(httpTraceHdrs(adminAPI.UpdateAdminCredentialsHandler))
-	// Get config
-	adminV1Router.Methods(http.MethodGet).Path("/config").HandlerFunc(httpTraceHdrs(adminAPI.GetConfigHandler))
-	// Set config
-	adminV1Router.Methods(http.MethodPut).Path("/config").HandlerFunc(httpTraceHdrs(adminAPI.SetConfigHandler))
+	if enableIAM {
+		// Update credentials
+		adminV1Router.Methods(http.MethodPut).Path("/config/credential").HandlerFunc(httpTraceHdrs(adminAPI.UpdateAdminCredentialsHandler))
+		// Get config
+		adminV1Router.Methods(http.MethodGet).Path("/config").HandlerFunc(httpTraceHdrs(adminAPI.GetConfigHandler))
+		// Set config
+		adminV1Router.Methods(http.MethodPut).Path("/config").HandlerFunc(httpTraceHdrs(adminAPI.SetConfigHandler))
 
-	// Get config keys/values
-	adminV1Router.Methods(http.MethodGet).Path("/config-keys").HandlerFunc(httpTraceHdrs(adminAPI.GetConfigKeysHandler))
-	// Set config keys/values
-	adminV1Router.Methods(http.MethodPut).Path("/config-keys").HandlerFunc(httpTraceHdrs(adminAPI.SetConfigKeysHandler))
+		// Get config keys/values
+		adminV1Router.Methods(http.MethodGet).Path("/config-keys").HandlerFunc(httpTraceHdrs(adminAPI.GetConfigKeysHandler))
+		// Set config keys/values
+		adminV1Router.Methods(http.MethodPut).Path("/config-keys").HandlerFunc(httpTraceHdrs(adminAPI.SetConfigKeysHandler))
 
-	// -- IAM APIs --
+		// -- IAM APIs --
 
-	// Add policy IAM
-	adminV1Router.Methods(http.MethodPut).Path("/add-canned-policy").HandlerFunc(httpTraceHdrs(adminAPI.AddCannedPolicy)).Queries("name", "{name:.*}")
+		// Add policy IAM
+		adminV1Router.Methods(http.MethodPut).Path("/add-canned-policy").HandlerFunc(httpTraceHdrs(adminAPI.AddCannedPolicy)).Queries("name", "{name:.*}")
 
-	// Add user IAM
-	adminV1Router.Methods(http.MethodPut).Path("/add-user").HandlerFunc(httpTraceHdrs(adminAPI.AddUser)).Queries("accessKey", "{accessKey:.*}")
-	adminV1Router.Methods(http.MethodPut).Path("/set-user-policy").HandlerFunc(httpTraceHdrs(adminAPI.SetUserPolicy)).
-		Queries("accessKey", "{accessKey:.*}").Queries("name", "{name:.*}")
-	adminV1Router.Methods(http.MethodPut).Path("/set-user-status").HandlerFunc(httpTraceHdrs(adminAPI.SetUserStatus)).
-		Queries("accessKey", "{accessKey:.*}").Queries("status", "{status:.*}")
+		// Add user IAM
+		adminV1Router.Methods(http.MethodPut).Path("/add-user").HandlerFunc(httpTraceHdrs(adminAPI.AddUser)).Queries("accessKey", "{accessKey:.*}")
+		adminV1Router.Methods(http.MethodPut).Path("/set-user-policy").HandlerFunc(httpTraceHdrs(adminAPI.SetUserPolicy)).
+			Queries("accessKey", "{accessKey:.*}").Queries("name", "{name:.*}")
+		adminV1Router.Methods(http.MethodPut).Path("/set-user-status").HandlerFunc(httpTraceHdrs(adminAPI.SetUserStatus)).
+			Queries("accessKey", "{accessKey:.*}").Queries("status", "{status:.*}")
 
-	// Remove policy IAM
-	adminV1Router.Methods(http.MethodDelete).Path("/remove-canned-policy").HandlerFunc(httpTraceHdrs(adminAPI.RemoveCannedPolicy)).Queries("name", "{name:.*}")
+		// Remove policy IAM
+		adminV1Router.Methods(http.MethodDelete).Path("/remove-canned-policy").HandlerFunc(httpTraceHdrs(adminAPI.RemoveCannedPolicy)).Queries("name", "{name:.*}")
 
-	// Remove user IAM
-	adminV1Router.Methods(http.MethodDelete).Path("/remove-user").HandlerFunc(httpTraceHdrs(adminAPI.RemoveUser)).Queries("accessKey", "{accessKey:.*}")
+		// Remove user IAM
+		adminV1Router.Methods(http.MethodDelete).Path("/remove-user").HandlerFunc(httpTraceHdrs(adminAPI.RemoveUser)).Queries("accessKey", "{accessKey:.*}")
 
-	// List users
-	adminV1Router.Methods(http.MethodGet).Path("/list-users").HandlerFunc(httpTraceHdrs(adminAPI.ListUsers))
+		// List users
+		adminV1Router.Methods(http.MethodGet).Path("/list-users").HandlerFunc(httpTraceHdrs(adminAPI.ListUsers))
 
-	// List policies
-	adminV1Router.Methods(http.MethodGet).Path("/list-canned-policies").HandlerFunc(httpTraceHdrs(adminAPI.ListCannedPolicies))
+		// List policies
+		adminV1Router.Methods(http.MethodGet).Path("/list-canned-policies").HandlerFunc(httpTraceHdrs(adminAPI.ListCannedPolicies))
+	}
 
-	// If none of the routes match.
-	adminV1Router.NotFoundHandler = http.HandlerFunc(httpTraceHdrs(notFoundHandler))
+	// If none of the routes match, return error.
+	adminV1Router.NotFoundHandler = http.HandlerFunc(httpTraceHdrs(notFoundHandlerJSON))
 }
diff --git a/cmd/gateway-main.go b/cmd/gateway-main.go
index 2ab9fad38..29e18ce83 100644
--- a/cmd/gateway-main.go
+++ b/cmd/gateway-main.go
@@ -173,11 +173,12 @@ func StartGateway(ctx *cli.Context, gw Gateway) {
 	if globalEtcdClient != nil {
 		// Enable STS router if etcd is enabled.
 		registerSTSRouter(router)
-
-		// Enable admin router if etcd is enabled.
-		registerAdminRouter(router)
 	}
 
+	// Enable IAM admin APIs if etcd is enabled, if not just enable basic
+	// operations such as profiling, server info etc.
+	registerAdminRouter(router, globalEtcdClient != nil)
+
 	// Add healthcheck router
 	registerHealthCheckRouter(router)
 
@@ -307,5 +308,8 @@ func StartGateway(ctx *cli.Context, gw Gateway) {
 		printGatewayStartupMessage(getAPIEndpoints(), gatewayName)
 	}
 
+	// Set uptime time after object layer has initialized.
+	globalBootTime = UTCNow()
+
 	handleSignals()
 }
diff --git a/cmd/handler-utils.go b/cmd/handler-utils.go
index f6cf7dcf1..dc38c9425 100644
--- a/cmd/handler-utils.go
+++ b/cmd/handler-utils.go
@@ -351,6 +351,12 @@ func getResource(path string, host string, domain string) (string, error) {
 	return slashSeparator + pathJoin(bucket, path), nil
 }
 
+// If none of the http routes match respond with MethodNotAllowed, in JSON
+func notFoundHandlerJSON(w http.ResponseWriter, r *http.Request) {
+	writeErrorResponseJSON(w, ErrMethodNotAllowed, r.URL)
+	return
+}
+
 // If none of the http routes match respond with MethodNotAllowed
 func notFoundHandler(w http.ResponseWriter, r *http.Request) {
 	writeErrorResponse(w, ErrMethodNotAllowed, r.URL, guessIsBrowserReq(r))
diff --git a/cmd/routers.go b/cmd/routers.go
index 761b8c02b..d33db75da 100644
--- a/cmd/routers.go
+++ b/cmd/routers.go
@@ -107,8 +107,8 @@ func configureServerHandler(endpoints EndpointList) (http.Handler, error) {
 	// Add Admin RPC router
 	registerAdminRPCRouter(router)
 
-	// Add Admin router.
-	registerAdminRouter(router)
+	// Add Admin router, all APIs are enabled in server mode.
+	registerAdminRouter(router, true)
 
 	// Add healthcheck router
 	registerHealthCheckRouter(router)