The Servermeister.com monitoring agent poses no threat to the security of your server. The Servermeister.com server monitoring agent uses only one-way HTTPS connection which is firewall friendly and you do not normally need to open up any new ports to the outside in your firewall. More over the communication happens over HTTPS and the data is encrypted. Servermeister.com also does not ask for the server password, so there is no data that can compromise the security of your server.