Prerequisites for installing On-Premise Poller

Prerequisites for installing the On-Premise Poller

To monitor your internal network and resources behind a firewall, you need to install the On-Premise Poller within your network. You can install the On-Premise Poller on physical or virtual machines. 
System requirements: 
The machine on which the On-Premise Poller will be installed should meet the below requirements: 
RAM16GB
(A minimum of 12GB of memory is required apart from the memory consumed by the OS and other processes)
Processor/ Virtual Processor
8 processors/ 16 Virtual Processors
Processor Speed2.5GHz or above
Disk Space250GB or higher
OSWindows or Linux
Web Page Speed (Browser) monitoring is available only on CentOS 7.0-7.8 or RHEL 7.x (Requires additional software installation)
Currently, the On-Premise Poller does not support ARM-based machines.​
OS Type
64-bit
Table 1: System requirements for installing the On-Premise Poller.
The On-Premise Poller needs to be started with root or Administrator privileges after installation, depending on whether the machine OS is Linux or Windows. 
If the On-Premise Poller is installed in a secure network, make sure you allow access to these domains and ports in your firewall to facilitate communication with the Site24x7 central server.
The requirements for an On-Premise Poller might differ slightly according to the specific type of monitoring you require. 

Additional requirements for network monitoring

We recommend using dedicated On-Premise Pollers to monitor your networks.
Ports to be allowlisted: 
The following ports need to be included in the allowlist for both the network's firewall (if applicable) and the firewall of the machine hosting the On-Premise Poller: 
Port
Protocol
Description
Inbound/ Outbound/Bidirectional
Used for
161
UDP
SNMP commands and messages
Bidirectional
SNMP-based monitoring
162
UDP
SNMP Trap Receiver port
Inbound
SNMP-based monitoring
8060
TCP
Network module for data collection
Bidirectional
SNMP-based monitoring
13306
TCP
PostgreSQL Database Port
-
SNMP-based monitoring
9996
TCP
NetFlow Listener Port 
Inbound
NetFlow Analyzer
22
SSH
SSHD port
The default SSH service is used for remote login to the device on which the On-Premise Poller is installed.
Bidirectional
Network Configuration Manager (NCM)
23
Telnet
Telnet port
The default Telnet service is used for remote login to the device on which the On-Premise Poller is installed.
Bidirectional
NCM
69
TFTP
TFTP port
Bidirectional
NCM
514
UDP
Syslog Receiver Port
Inbound
NCM
Table 2: Additional ports to be allowlisted.
If ports 8060, 9996, and 13306 are unavailable, subsequent ports that are free will be identified and used, like 8061, 9997, and 13307, respectively.
The number of On-Premise Pollers required to monitor your networks might vary based on the number of resources to be monitored. Use this calculator to find out the number of On-Premise Pollers that you will require. 

Additional requirements for Web Transaction (Browser) and Web Page Speed (Browser) monitoring

We recommend using dedicated On-Premise Pollers to monitor your Web Transaction (Browser) and Web Page Speed (Browser).
You can monitor up to 40 Web Transaction (Browser) monitors at a five-minute poll interval using one On-Premise Poller with the system requirements mentioned above.
Read on to learn more about additional prerequisites for installing the On-Premise Poller for Web Transaction (Browser) and Web Page Speed (Browser).

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