Hi,
When executing unix scripts or nagios scripts, ssh is used to interact with the unix servers. The only problem is that no SSH certificates are supported today.
When securing a unix server, it is common not to allow any password authentication for SSH. The only way to get SSH access is through public/private key algorithms making it very hard for hackers to hack into. Then once you have access with a secure certificate, you will need password authentication to become a root user.
Unfortunately, if you want to use APM, you have to open up your Unix server to password authentication. This makes it much easier for bots to use brute-force attacks to gain access to your servers.
By supporting SSH certificates, I would be able to use APM and not compromise the security of our servers.
Thanks!
Frik