I got a call last week from a client that was having some issues with retrieving email from a Dovecot IMAP server. The client was connecting over TLS and was using an Apple mail client. Upon checking the mailserver log, I was greeted with a flood of rather vicious looking errors. I’m not gonna post the entire backtrace since its rather long, but you’ll get the idea.
BlueOnyx uses the PAM ABL module to mitigate brute force attacks. Though it’s not a good idea to rely solely on this module to protect your services, it’s definitely better than nothing. However, for some reason the database storing the failed hosts and users tends to corrupt easily on BlueOnyx systems.
After installing a new wildcard SSL certificate on a BlueOnyx 5106R server, I performed the mandatory system tasks to spot any potential problems. Unfortunately the system was rapidly throwing the following error messages:
The following article demonstrates one approach to installing and configuring a BlueOnyx OpenVZ container using Proxmox VE 1.9. If you’re familiar with Proxmox VE you might have noticed that BlueOnyx has been pulled from the list of community maintained appliances.