Introduction to server remote connection methods-Simple Application Server(SAS)-阿里云帮助中心

Simple Application Server supports four remote connection methods. The right choice depends on your instance's operating system, whether you have local software installed, and whether the instance is reachable over the network.

Connection method	Core advantages	Works with	Credentials	Local software required
Workbench (browser)	Browser-based access, no configuration required	Linux, Windows	One-click logon, password	No
SSH client	Supports key pair logon, stable connection	Linux	Password, key pair	Yes
RDP client	Graphical interface, intuitive operation	Windows	Password	Yes
VNC rescue connection	Emergency troubleshooting, such as for SSH server or firewall issues	Linux, Windows	Password	No

Choose a connection method

Workbench

Workbench lets you log on to and manage your server directly from a browser — no software to install, no configuration required.

To connect to a Linux server, see Connect to a Linux server using Workbench.
To connect to a Windows server, see Connect to a Windows server using Workbench.

SSH and RDP clients

Install a client on your local computer for a stable, full-featured connection. SSH clients also support key pair logon for Linux servers.

Linux servers: Use an SSH client such as PuTTY for command-line operations. See Connect to a Linux server using an SSH client.
Windows servers: Use a Remote Desktop (RDP/MSTSC) client for a graphical interface. See Connect to a Windows server using MSTSC.

VNC rescue connection

Use the VNC rescue connection when you cannot reach your server over the network — for example, when a firewall misconfiguration or an SSH service failure blocks all other connection methods.

Limitations: The VNC rescue connection requires password authentication. Use it only for emergency troubleshooting, then switch back to Workbench or an SSH client for regular work.

For instructions, see Use a rescue connection to connect to a server.

FAQ

What is the default username?

Linux: root
Windows: Administrator

What is the initial password?

There is no initial password. Before logging on with a password for the first time, set the server password in the console.

Why can't I log on with a password after attaching a key pair?

Attaching a key pair to a Linux server and restarting it disables password-based logon by default. To restore password logon, reset the password in the console (the original password works).