[Users] Having some `brute` force log-in attempts on Zimbra

[Barry de Graaff]

Hello Folks,

I am seeing some subtle brute force log-in attempts on the Alliance mailserver.

Every hour or so, someone from different locations in Brazil is trying to log onto
our server. And it does not seem to be a normal user with a wrong password or so.

What do you guys use to mitigate these? Should I add some fail2ban?

Thanks!

Kind regards, 

Barry de Graaff
Zeta Alliance 
Co-founder & Developer
zetalliance.org | github.com/Zimbra-Community

+31 617 220 227
Fingerprint: 97f4694a1d9aedad012533db725ddd156d36a2d0