RMON (remote monitoring) is an easy to understand and use geo-distributed monitoring.

• Telegram Channel about RMON, talks and questions are welcome

1. Checking ping availability
2. Checking DNS records availability
3. Checking the availability of TCP and UDP ports
4. Checking HTTP statuses
5. Checking the BODY of HTTP(s) responses
6. Checking the SSL expiration date
7. Checking SMTP service
8. Checking RabbitMQ service
9. Sending Telegram, Slack, PagerDuty and Email notifications
10. Real-time alerting via RMON web interface
11. Checking network connectivity
12. Providing information upon response time
13. Providing information upon servers uptime and downtime
14. Storing the alarm history
15. Storing the history of events for each host
16. Status pages
17. RMON Agents
18. Network tools

For installation on EL and Ubuntu read this guide