Understanding Junos OS in FIPS Mode
Federal Information Processing Standards (FIPS) 140-2 defines security levels for hardware and software that perform cryptographic functions. By meeting the applicable overall requirements within the FIPS standard, Juniper Networks EX Series switches running the Juniper Networks Junos operating system (Junos OS) in FIPS mode comply with the FIPS 140-2 Level 1 standard.
Operating EX Series Ethernet switches in a FIPS 140-2 Level 1 environment requires enabling and configuring FIPS mode on the switches from the Junos OS CLI.
The Crypto Officer enables FIPS mode in Junos OS and sets up keys and passwords for the system and other FIPS users who can view the configuration. Both Crypto Officer and user can perform normal configuration tasks on the switch (such as modify interface types) as individual user configuration allows.
About the Cryptographic Boundary on Your EX Series Switch
FIPS 140-2 compliance requires a defined cryptographic boundary around each cryptographic module on a switch. Junos OS in FIPS mode prevents the cryptographic module from executing any software that is not part of the FIPS-certified distribution, and allows only FIPS-approved cryptographic algorithms to be used. No critical security parameters (CSPs), such as passwords and keys, can cross the cryptographic boundary of the module by, for example, being displayed on a console or written to an external log file.
Virtual Chassis features are not supported in FIPS mode. Do not configure a Virtual Chassis in FIPS mode.
How FIPS Mode Differs from Non-FIPS Mode
Unlike Junos OS in non-FIPS mode, Junos OS in FIPS mode is a non-modifiable operational environment. In addition, Junos OS in FIPS mode differs in the following ways from Junos OS in non-FIPS mode:
Self-tests of all cryptographic algorithms are performed at startup.
Self-tests of random number and key generation are performed continuously.
Weak cryptographic algorithms such as Data Encryption Standard (DES) and Message Digest 5 (MD5) are disabled.
Weak or unencrypted management connections must not be configured.
Passwords must be encrypted with strong one-way algorithms that do not permit decryption.
Administrator passwords must be at least 10 characters long.
Validated Version of Junos OS in FIPS Mode
To determine whether a Junos OS release is NIST-validated, see the compliance advisor page on the Juniper Networks Web site (https://apps.juniper.net/compliance/).
On EX4300 switches, when an upgrade validation fails in FIPS mode, in some cases, several error messages are displayed. These error messages appear when the system tries to remove package related files. These errors do not impact the system operation, and the package related files are removed during the next reboot.