Juniper Switch Default Username and Password Guide (EX2200/EX4300/QFX) For most Juniper EX and QFX switches, as well as many devices running Junos OS, the default login credentials are simple: Username: root Password: (blank — press Enter) This applies to many common enterprise switches including EX2200, EX3300, EX4200, EX4300, and several QFX platforms. However, in real deployments, many engineers quickly discover that logging in is only the beginning. Commit failures, J-Web access issues, and unknown passwords on reused hardware are all common operational problems. This guide covers default Juniper credentials, password configuration, recovery procedures, and real-world deployment best practices. Default Juniper Login Credentials Device / Platform Username Password EX/QFX/SRX running Junos OS root (blank) Session Smart Router (SSR) t128 128tRoutes Junos Space VM admin abc123 Older ScreenOS devices netscreen netscreen For most factory-default EX switches: login: root Password: [Press ...