diff --git a/pkg/administration/connectivity.go b/pkg/administration/connectivity.go
index b6cedae..d9d5134 100644
--- a/pkg/administration/connectivity.go
+++ b/pkg/administration/connectivity.go
@@ -1,14 +1,13 @@
 package administration
 
 import (
-	"fmt"
-
 	roadsign "code.smartsheep.studio/goatworks/roadsign/pkg"
 	"github.com/gofiber/fiber/v2"
 )
 
 func responseConnectivity(c *fiber.Ctx) error {
-	return c.
-		Status(fiber.StatusOK).
-		SendString(fmt.Sprintf("Hello from RoadSign v%s", roadsign.AppVersion))
+	return c.Status(fiber.StatusOK).JSON(fiber.Map{
+		"server":  "RoadSign",
+		"version": roadsign.AppVersion,
+	})
 }
diff --git a/pkg/cmd/cli/conn/connect.go b/pkg/cmd/cli/conn/connect.go
deleted file mode 100644
index 158ce54..0000000
--- a/pkg/cmd/cli/conn/connect.go
+++ /dev/null
@@ -1,25 +0,0 @@
-package conn
-
-import (
-	"fmt"
-
-	"github.com/gofiber/fiber/v2"
-)
-
-type CliConnection struct {
-	Url        string `json:"url"`
-	Credential string `json:"credential"`
-}
-
-func (v CliConnection) GetConnectivity() error {
-	client := fiber.Get(v.Url + "/cgi/connectivity")
-	client.BasicAuth("RoadSign CLI", v.Credential)
-
-	if status, _, err := client.String(); len(err) > 0 {
-		return fmt.Errorf("couldn't connect to server: %q", err)
-	} else if status != 200 {
-		return fmt.Errorf("server rejected request, may cause by invalid credential")
-	}
-
-	return nil
-}
diff --git a/pkg/cmd/cli/conn/commands.go b/pkg/cmd/rds/conn/commands.go
similarity index 83%
rename from pkg/cmd/cli/conn/commands.go
rename to pkg/cmd/rds/conn/commands.go
index 980a97d..2942075 100644
--- a/pkg/cmd/cli/conn/commands.go
+++ b/pkg/cmd/rds/conn/commands.go
@@ -22,7 +22,7 @@ var CliCommands = []*cli.Command{
 
 			log.Info().Msgf("There are %d server(s) connected in total.", len(servers))
 			for idx, server := range servers {
-				log.Info().Msgf("%d. %s", idx+1, server.Url)
+				log.Info().Msgf("%d) %s: %s", idx+1, server.ID, server.Url)
 			}
 
 			return nil
@@ -32,15 +32,16 @@ var CliCommands = []*cli.Command{
 		Name:        "connect",
 		Aliases:     []string{"add"},
 		Description: "Connect and save configuration of remote server",
-		ArgsUsage:   "<server url> <credential>",
+		ArgsUsage:   "<id> <server url> <credential>",
 		Action: func(ctx *cli.Context) error {
-			if ctx.Args().Len() < 2 {
-				return fmt.Errorf("must have more two arguments: <server url> <credential>")
+			if ctx.Args().Len() < 3 {
+				return fmt.Errorf("must have three arguments: <id> <server url> <credential>")
 			}
 
 			c := CliConnection{
-				Url:        ctx.Args().Get(0),
-				Credential: ctx.Args().Get(1),
+				ID:         ctx.Args().Get(0),
+				Url:        ctx.Args().Get(1),
+				Credential: ctx.Args().Get(2),
 			}
 
 			if err := c.GetConnectivity(); err != nil {
@@ -64,7 +65,7 @@ var CliCommands = []*cli.Command{
 		Name:        "disconnect",
 		Aliases:     []string{"remove"},
 		Description: "Remove a remote server configuration",
-		ArgsUsage:   "<server url>",
+		ArgsUsage:   "<id>",
 		Action: func(ctx *cli.Context) error {
 			if ctx.Args().Len() < 1 {
 				return fmt.Errorf("must have more one arguments: <server url>")
@@ -74,7 +75,7 @@ var CliCommands = []*cli.Command{
 			raw, _ := json.Marshal(viper.Get("servers"))
 			_ = json.Unmarshal(raw, &servers)
 			viper.Set("servers", lo.Filter(servers, func(item CliConnection, idx int) bool {
-				return item.Url != ctx.Args().Get(0)
+				return item.ID != ctx.Args().Get(0)
 			}))
 
 			if err := viper.WriteConfig(); err != nil {
diff --git a/pkg/cmd/rds/conn/connect.go b/pkg/cmd/rds/conn/connect.go
new file mode 100644
index 0000000..bdc0b21
--- /dev/null
+++ b/pkg/cmd/rds/conn/connect.go
@@ -0,0 +1,37 @@
+package conn
+
+import (
+	"encoding/json"
+	"fmt"
+
+	roadsign "code.smartsheep.studio/goatworks/roadsign/pkg"
+	"github.com/gofiber/fiber/v2"
+	"github.com/rs/zerolog/log"
+)
+
+type CliConnection struct {
+	ID         string `json:"id"`
+	Url        string `json:"url"`
+	Credential string `json:"credential"`
+}
+
+func (v CliConnection) GetConnectivity() error {
+	client := fiber.Get(v.Url + "/cgi/connectivity")
+	client.BasicAuth("RoadSign CLI", v.Credential)
+
+	if status, data, err := client.Bytes(); len(err) > 0 {
+		return fmt.Errorf("couldn't connect to server: %q", err)
+	} else if status != 200 {
+		return fmt.Errorf("server rejected request, may cause by invalid credential")
+	} else {
+		var resp fiber.Map
+		if err := json.Unmarshal(data, &resp); err != nil {
+			return err
+		} else if resp["server"] != "RoadSign" {
+			return fmt.Errorf("remote server isn't roadsign")
+		} else if resp["version"] != roadsign.AppVersion {
+			log.Warn().Msg("Server connected successfully, but remote server version mismatch than CLI version, some features may buggy or completely unusable.")
+		}
+	}
+	return nil
+}
diff --git a/pkg/cmd/cli/main.go b/pkg/cmd/rds/main.go
similarity index 92%
rename from pkg/cmd/cli/main.go
rename to pkg/cmd/rds/main.go
index 0a6aaeb..b36b0a1 100644
--- a/pkg/cmd/cli/main.go
+++ b/pkg/cmd/rds/main.go
@@ -4,7 +4,7 @@ import (
 	"os"
 
 	roadsign "code.smartsheep.studio/goatworks/roadsign/pkg"
-	"code.smartsheep.studio/goatworks/roadsign/pkg/cmd/cli/conn"
+	"code.smartsheep.studio/goatworks/roadsign/pkg/cmd/rds/conn"
 	"github.com/rs/zerolog"
 	"github.com/rs/zerolog/log"
 	"github.com/spf13/viper"
@@ -36,6 +36,7 @@ func main() {
 	app := &cli.App{
 		Name:     "RoadSign CLI",
 		Version:  roadsign.AppVersion,
+		Suggest:  true,
 		Commands: append([]*cli.Command{}, conn.CliCommands...),
 	}
 
diff --git a/pkg/meta.go b/pkg/meta.go
index 775d41c..b036dc4 100644
--- a/pkg/meta.go
+++ b/pkg/meta.go
@@ -1,5 +1,5 @@
 package roadsign
 
 const (
-	AppVersion = "1.2.0"
+	AppVersion = "1.2.1"
 )