diff --git a/cmd/cli/prog_linux.go b/cmd/cli/prog_linux.go
index b987ed3..cc0046b 100644
--- a/cmd/cli/prog_linux.go
+++ b/cmd/cli/prog_linux.go
@@ -13,6 +13,7 @@ import (
 	"tailscale.com/health"
 
 	"github.com/Control-D-Inc/ctrld/internal/dns"
+	"github.com/Control-D-Inc/ctrld/internal/router"
 )
 
 func init() {
@@ -39,6 +40,9 @@ func setDependencies(svc *service.Config) {
 			svc.Dependencies = append(svc.Dependencies, "Wants=systemd-networkd-wait-online.service")
 		}
 	}
+	if routerDeps := router.ServiceDependencies(); len(routerDeps) > 0 {
+		svc.Dependencies = append(svc.Dependencies, routerDeps...)
+	}
 }
 
 func setWorkingDirectory(svc *service.Config, dir string) {
diff --git a/internal/clientinfo/ubios.go b/internal/clientinfo/ubios.go
index 1a60de0..0ffd6e5 100644
--- a/internal/clientinfo/ubios.go
+++ b/internal/clientinfo/ubios.go
@@ -3,6 +3,7 @@ package clientinfo
 import (
 	"bytes"
 	"encoding/json"
+	"fmt"
 	"io"
 	"os/exec"
 	"strings"
@@ -44,9 +45,9 @@ func (u *ubiosDiscover) refreshDevices() error {
 	cmd := exec.Command("/usr/bin/mongo", "localhost:27117/ace", "--quiet", "--eval", `
 		DBQuery.shellBatchSize = 256;
 		db.user.find({name: {$exists: true, $ne: ""}}, {_id:0, mac:1, name:1});`)
-	b, err := cmd.Output()
+	b, err := cmd.CombinedOutput()
 	if err != nil {
-		return err
+		return fmt.Errorf("out: %s, err: %w", string(b), err)
 	}
 	return u.storeDevices(bytes.NewReader(b))
 }
diff --git a/internal/router/router.go b/internal/router/router.go
index 4b335a6..2d8c462 100644
--- a/internal/router/router.go
+++ b/internal/router/router.go
@@ -215,6 +215,20 @@ func LeaseFilesDir() string {
 	return ""
 }
 
+// ServiceDependencies returns list of dependencies that ctrld services needs on this router.
+// See https://pkg.go.dev/github.com/kardianos/service#Config for list format.
+func ServiceDependencies() []string {
+	if Name() == ubios.Name {
+		// On Ubios, ctrld needs to start after unifi-mongodb,
+		// so it can query custom client info mapping.
+		return []string{
+			"Wants=unifi-mongodb.service",
+			"After=unifi-mongodb.service",
+		}
+	}
+	return nil
+}
+
 func distroName() string {
 	switch {
 	case bytes.HasPrefix(unameO(), []byte("DD-WRT")):
diff --git a/internal/router/service_ubios.go b/internal/router/service_ubios.go
index 0b49cd2..8077c07 100644
--- a/internal/router/service_ubios.go
+++ b/internal/router/service_ubios.go
@@ -219,6 +219,8 @@ const ubiosBootSystemdService = `[Unit]
 Description=Run ctrld On Startup UDM
 Wants=network-online.target
 After=network-online.target
+Wants=unifi-mongodb
+After=unifi-mongodb
 StartLimitIntervalSec=500
 StartLimitBurst=5