InformationRemote console connections should only use SSH Version 2.
SSH Version 1 has been subject to a number of serious vulnerabilities and is no longer considered to be a secure protocol, resulting in the adoption of SSH Version 2 as an Internet Standard in 2006. Juniper routers support both versions, but due to the weakness of SSH Version 1 only the later standard should be used.
SolutionTo restrict SSH to Version 2 only, issue the following command from the [edit system service ssh] hierarchy:
[edit system services ssh]
[email protected]#set protocol-version v2
Version 2 should be the default on all current platforms.