Zabbix NAT problem

I recently replaced my home router with a MikroTik router. I further split servers into two groups. – Production – Dev My Zabbix server sits in production network and some Zabbix clients sits in dev network. For some reason there is some kind of NAT issue preventing Zabbix …..

Postfix SMTP relay

For home servers I funnel all emails through a single Postfix SMTP relay via a Gmail account. (On Debian 9 you need to install libsasl2-modules first.)   Create /etc/postfix/sasl_passwd file with following content (replace the obvious variables): []:587 $$PASS   Then generate Postfix map file. This will create /etc/postfix/sasl_passwd.db file. …..

Transfer Let’s Encrypt certificates to new server

It’s very easy to move Let’s Encrypt SSL certificates to new server. If you don’t know who Let’s Encrypt certificate authority is… read up here. All you need to do install Let’s Encrypt on new serer first, then transfer the following directories to same location on new server. /etc/letsencrypt/archive/$SITE /etc/letsencrypt/live/$SITE …..