Jumpstart Instructions

First-time users most typically access the Junos OS running on their device in one of two ways:

• Over a network: Someone else installed the device and can provide you with the hostname as well as the username and password assigned to you. The device may be on a separate subnet behind a gateway device that protects unauthorized access to it, in which case, you will also need the login credentials of the gateway server.
• In direct connection: You are directly connected to the device through the console or a management port using a null-modem or rollover cable. The first time you log in to a device that has never been configured, you will be logging in as the root user, and you will not need a password. The root user is a super-administrator who can perform any operation, from benign checks such as looking at the status of the device to disruptive operations such as changing the configuration and rebooting the device.