diff --git a/agent/utils/cloud_storage/client/sftp.go b/agent/utils/cloud_storage/client/sftp.go
index b1e9d179fe1c..edc899bf5cef 100644
--- a/agent/utils/cloud_storage/client/sftp.go
+++ b/agent/utils/cloud_storage/client/sftp.go
@@ -1,7 +1,6 @@
 package client
 
 import (
-	"fmt"
 	"io"
 	"net"
 	"os"
@@ -53,11 +52,12 @@ func NewSftpClient(vars map[string]interface{}) (*sftpClient, error) {
 			return nil
 		},
 	}
-	if _, err := ssh.Dial("tcp", fmt.Sprintf("%s:%s", address, port), clientConfig); err != nil {
+	addr := net.JoinHostPort(address, port)
+	if _, err := ssh.Dial("tcp", addr, clientConfig); err != nil {
 		return nil, err
 	}
 
-	return &sftpClient{connInfo: fmt.Sprintf("%s:%s", address, port), config: clientConfig}, nil
+	return &sftpClient{connInfo: addr, config: clientConfig}, nil
 }
 
 func (s sftpClient) Upload(src, target string) (bool, error) {
diff --git a/agent/utils/cloud_storage/client/webdav.go b/agent/utils/cloud_storage/client/webdav.go
index a7f581654ef3..f82d467fc26d 100644
--- a/agent/utils/cloud_storage/client/webdav.go
+++ b/agent/utils/cloud_storage/client/webdav.go
@@ -2,8 +2,8 @@ package client
 
 import (
 	"crypto/tls"
-	"fmt"
 	"io"
+	"net"
 	"net/http"
 	"os"
 	"path"
@@ -25,7 +25,7 @@ func NewWebDAVClient(vars map[string]interface{}) (*webDAVClient, error) {
 	username := loadParamFromVars("username", vars)
 	bucket := loadParamFromVars("bucket", vars)
 
-	url := fmt.Sprintf("%s:%s", address, port)
+	url := net.JoinHostPort(address, port)
 	if len(port) == 0 {
 		url = address
 	}
diff --git a/agent/utils/ssh/ssh.go b/agent/utils/ssh/ssh.go
index d64264e7e984..d00f700e4896 100644
--- a/agent/utils/ssh/ssh.go
+++ b/agent/utils/ssh/ssh.go
@@ -2,6 +2,7 @@ package ssh
 
 import (
 	"fmt"
+	"net"
 	"strings"
 	"time"
 
@@ -24,12 +25,10 @@ type SSHClient struct {
 }
 
 func NewClient(c ConnInfo) (*SSHClient, error) {
-	if strings.Contains(c.Addr, ":") {
-		c.Addr = fmt.Sprintf("[%s]", c.Addr)
-	}
 	config := &gossh.ClientConfig{}
 	config.SetDefaults()
-	addr := fmt.Sprintf("%s:%d", c.Addr, c.Port)
+
+	addr := net.JoinHostPort(c.Addr, fmt.Sprintf("%d", c.Port))
 	config.User = c.User
 	if c.AuthMode == "password" {
 		config.Auth = []gossh.AuthMethod{gossh.Password(c.Password)}
diff --git a/core/utils/cloud_storage/client/sftp.go b/core/utils/cloud_storage/client/sftp.go
index 617b609ea549..32ff9669229e 100644
--- a/core/utils/cloud_storage/client/sftp.go
+++ b/core/utils/cloud_storage/client/sftp.go
@@ -1,7 +1,6 @@
 package client
 
 import (
-	"fmt"
 	"io"
 	"net"
 	"os"
@@ -56,11 +55,12 @@ func NewSftpClient(vars map[string]interface{}) (*sftpClient, error) {
 			return nil
 		},
 	}
-	if _, err := ssh.Dial("tcp", fmt.Sprintf("%s:%s", address, port), clientConfig); err != nil {
+	addr := net.JoinHostPort(address, port)
+	if _, err := ssh.Dial("tcp", addr, clientConfig); err != nil {
 		return nil, err
 	}
 
-	return &sftpClient{connInfo: fmt.Sprintf("%s:%s", address, port), config: clientConfig, bucket: bucket}, nil
+	return &sftpClient{connInfo: addr, config: clientConfig, bucket: bucket}, nil
 }
 
 func (s sftpClient) Upload(src, target string) (bool, error) {
diff --git a/core/utils/cloud_storage/client/webdav.go b/core/utils/cloud_storage/client/webdav.go
index 38d236b1066b..89d4c36f2178 100644
--- a/core/utils/cloud_storage/client/webdav.go
+++ b/core/utils/cloud_storage/client/webdav.go
@@ -2,7 +2,7 @@ package client
 
 import (
 	"crypto/tls"
-	"fmt"
+	"net"
 	"net/http"
 	"os"
 	"path"
@@ -25,7 +25,7 @@ func NewWebDAVClient(vars map[string]interface{}) (*webDAVClient, error) {
 	username := loadParamFromVars("username", vars)
 	bucket := loadParamFromVars("bucket", vars)
 
-	url := fmt.Sprintf("%s:%s", address, port)
+	url := net.JoinHostPort(address, port)
 	if len(port) == 0 {
 		url = address
 	}
diff --git a/core/utils/ssh/ssh.go b/core/utils/ssh/ssh.go
index 107f128a3866..c50b11db464a 100644
--- a/core/utils/ssh/ssh.go
+++ b/core/utils/ssh/ssh.go
@@ -29,12 +29,9 @@ type SSHClient struct {
 }
 
 func NewClient(c ConnInfo) (*SSHClient, error) {
-	if strings.Contains(c.Addr, ":") {
-		c.Addr = fmt.Sprintf("[%s]", c.Addr)
-	}
 	config := &gossh.ClientConfig{}
 	config.SetDefaults()
-	addr := fmt.Sprintf("%s:%d", c.Addr, c.Port)
+	addr := net.JoinHostPort(c.Addr, fmt.Sprintf("%d", c.Port))
 	config.User = c.User
 	if c.AuthMode == "password" {
 		config.Auth = []gossh.AuthMethod{gossh.Password(c.Password)}