Monthly Archives: February 2014

Change host name of Puppet client

Here are the steps i use to change the host name of a puppet client: On the client side stop Puppet, remove old certificates and change host name: Change the host name in /etc/sysconfig/network and /etc/hosts, then reboot the client. Remove the old certificate on the server: If you’re using Foreman, change the host name there too. Finally, initialize a … Continue reading

Posted in CentOS, Linux, Puppet | Tagged , , | Leave a comment

Plesk (11) – Redirect Webmail to HTTPS

By default the webmail interfaces of Plesk is running unsecured on port 80.┬áThat’s bad, really bad (Shame on you Parallels!). There are some guides out there to fix that, but they are all wrong in my eyes. Some are made for old releases, others are changing stuff in files which are overwritten on update or regeneration of config files. But … Continue reading

Posted in Apache, CentOS, Linux, Plesk | 3 Comments

Limit/prevent SSH brute force attempts

If you (have to) run a public available SSH server, you may have noticed already that there are a lot of brute force attacks trying to guess a user and password (have a look into /var/log/secure ). If you did it the correct way, you only allow public keys to authenticate of course. But maybe you can’t, because the client … Continue reading

Posted in CentOS, Firewalls, Linux, Security | Tagged , , , , | 1 Comment