Old Zabbix Proxy 4.2 installation could be quite confusing as you cannot grab the latest one to work with old Zabbix server. Fortunately there is archive packages repository at repo.zabbix.com/zabbix/4.2/ubuntu/pool/main/z/zabbix/. You need to keep track which operating systemu should be used. Refer to server requirements as it will be the same. So it’s Ubuntu 14, 16 or 18. First you should grab repository package which can be found named zabbix-release. For example: After installation with dpkg command, you can install particular proxy package with either MySQL, PostgreSQL or SQLite3. If you choose MySQL then you need to manually install database