After an aptitude update on dovecot to version 2.3.4 our mailcluster suddently stopped working with the following error in the dovecot.log.
We recently had quite some issues with my a customers icinga2 installation, where icingaweb2 was constantly complaining about the IDO Backend is not running. The setup was as follows: icinga2 + icingaweb2 was running on server „webnode.local“ icinga2 database and icingaweb2 databases were on „database.local“.
Ok, since Chrome68 the world has become a little more secure (treating http as insecure and enforcing certificate transparency).But now there's still one topic that could really offend you nicely secured server stack.
Enable DKIM (DomainKeys Identified Mail) & DMARC Domain-based Message Authentication, Reporting and Conformance
SPF is quite good - DKIM is better, use both to become best and then, enable DMARC ;) Please read our article regarding SPF enabling, since we require this to be enabled to follow those steps.
How to use Certbot to c reate LetsEncrypt Wildcard Certificates using ACME API version 2: Here's my documentation on how i got my wildcard working from Letsencrypt via the newly released API v2. Please note that we already got the backported certbot version installed on our servers!
For those who are working with the newest Debian version and are used to work along with the vim editor, the auto-enabled mouse behaviour might be quite offending. At least for me, it was, that's why was looking for a solution to turn off the mouse constantly.
HSTS headers (Strict Transport Security) are a huge security win since the web becomes more and more encrypted (thanks to letsencrypt.com)
As you might have heard on the news, there are two extremely critical security flaws out called meltdown and spectre.
We are proud to announce our borg backup wrapper version 1.0 (direct download here or 'git clone' the repo). You can find all of the documentation and the latest downloads within our makeITyourway projects page on github.
Collect nginx access.log in in graylog2 using json format and the nginx access_log syslog feature.