# 4.5 Command-line
Secure Shell (SSH) is a cryptographic network protocol to access the router’s command-line interface. The EZR24 router offers various ways to access the command-line interface.
## **Web Terminal**
After accessing the router, go to `System` > `Terminal`. Input the default username `root` and the router password. You will then receive the welcome message on the web terminal interface.
*\* The web terminal is unavailable under the Traversal Cloud mode.*
```
OutdoorRouter login: root
Password:
BusyBox v1.28.4 () built-in shell (ash)
╔═╗╦ ╦╔╦╗╔╦╗╔═╗╔═╗╦═╗╦═╗╔═╗╦ ╦╔╦╗╔═╗╦═╗
║ ║║ ║ ║ ║║║ ║║ ║╠╦╝╠╦╝║ ║║ ║ ║ ║╣ ╠╦╝
╚═╝╚═╝ ╩ ═╩╝╚═╝╚═╝╩╚═╩╚═╚═╝╚═╝ ╩ ╚═╝╩╚═
---------------------------------------
☼ ☼ ☼ OUTDOOR ROUTER ❅ ❅ ❅
---------------------------------------
root@CellularRouter:~#
```
## SSH Software
### **i. Linux & Mac**
For Linux and Mac computers, the most common tool is the system "Terminal" tool.
* Open a new `Terminal` window, type `ssh root@192.168.20.1` , and press *Enter*.
* If this is your first time logging in, you might be asked to clarify whether you want to log in. In that case, type yes and press `Enter`.
* Then type in the router’s admin password and press `Enter` to finish the login process.
{% hint style="info" %}
If the router has changed configurations, you might need to clear the stored SSH key information with this command. `ssh-keygen -R 192.168.20.1`.
{% endhint %}
### **ii. Windows**
For Windows computers, the most common SSH tool is **PuTTY**.
* Launch PuTTY and select the SSH option under the `Connection type` field.
* Type in the router’s LAN IP address `192.168.20.1` into the `Host Name` field.
* Type in the SSH port `22` into the `Port`” field.
* Click `Open` button.
* In the next window, type in the login name `root` and press `Enter`.
* Type in the router’s admin password and press `Enter` again.
* You should be greeted with a message.
---
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```
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```
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