Fail2ban is a daemon that can be used to monitor the logs of services and ban clients that based on incorrect behaviour. A must have on your Linux system. But sometimes you can forget enabling the correct jails, therefore always check the active jails on your system. This can be…

If you are using WordPress & Woocommerce in combination with mod_security2, you may have some false positives. In case you are having issues, you can use the Apache (.htaccess for example) “whitelist” below. This of course as an example.   <LocationMatch “/”>   SecRuleRemoveById 910006 # Google robot activity – Useful…

Ipv6…nice. But using Ipv6 when sending emails to google can be a pain in the *ss. It is possible that you get the following message in your postfix logs:  Our system has detected that this message does not 550-5.7.1 meet IPv6 sending guidelines regarding PTR records and authentication 550-5.7.1 As…