This chapter gives an idea of ports and protocols that Nagios comprises.
The default protocols used by Nagios are as given under −
http(s), ports 80 and 443 − The product interfaces are web-based in Nagios. Nagios agents can use http to move data.
snmp, ports 161 and 162 − snmp is an important part of network monitoring. Port 161 is used to send requests to nodes and post 162 is used to receive results.
ssh, port 22 − Nagios is built to run natively on CentOS or RHEL Linux. Administrator can login into Nagios through SSH whenever they feel to do so and perform checks.
The Default ports used by common Nagios Plugins are as given under −