I have created a snap of sshguard. It’s based on the latest release of sshguard v2.0.0. If you are interested in using it, please give it a try.
$ sudo snap install --beta sshguard-robertliu
$ sudo snap connect sshguard-robertliu:firewall-control
$ sudo snap connect sshguard-robertliu:log-observe
$ sudo systemctl restart snap.sshguard-robertliu.sshguard.service
the source code is placed at github.
Any feedback is welcome!