【IP Ports】in system programming is essentially a Socket, the endpoint between two communicating programs.
Whether in Windows, Linux, or Unix systems, Socket is a crucial API (Application Programming Interface),
allowing inter-process communication on the same computer as well as cross-computer communication over the network.
.png)
For example:
➢ Website services use port 80
➢ MySQL database runs on port 3306
Monitoring 【IP Ports】 is critically important as it can reveal the system activation status and network connection quality of application system network services.
A port in the LISTEN state indicates normal operation; if closed, it may indicate a system anomaly.
This monitoring method is key to maintaining stable system operations.
Introduction to Socket Port
In the world of TCP/IP, Socket plays a vital role. It acts as an interface between a program and TCP/IP connection,
allowing network application developers to focus on application layer programming without delving into network architecture.
A Socket is composed of its IP address and Port. When establishing a Socket connection, the following elements are needed:
➢ Source Address
➢ Source Port
➢ Destination Address
➢ Destination Port
In network services, ports are typically assigned to specific service programs to establish communication channels.
For example, web services like Apache, IIS use port 80, remote login services like telnet use port 23,
SSH uses port 22, and FTP uses port 21.
Additionally, specialized application systems such as VPN, databases, SQL, etc., have dedicated ports.
When the relevant service or program encounters an anomaly, the corresponding port cannot connect normally.
Monitoring Socket Port
Ensuring the availability of IP ports (Socket Port) is a critical operational challenge. When a port cannot open,
services will not function properly, affecting overall system operation.
Traditional testing methods often struggle to detect issues in real-time, meaning network administrators might only learn of problems indirectly through user feedback,
delaying problem resolution and potentially attracting criticism.
Therefore, using WATCHDOG's 【IP Ports】 function for effective periodic detection helps network administrators promptly collect and analyze information, quickly locate problems, and improve system stability and reliability.
System Specifications for Monitoring 【IP Ports】
➢ Detection Purpose: Monitor Socket ports on network service-enabled devices to ensure uninterrupted network services on the host, such as websites, FTP servers, etc.
➢ Monitoring Target: Focus on whether the network service program is interrupted (closed).
➢ Alarm Conditions: Defined based on closed status, frequency, and duration.
➢ Real-time Information: Provide real-time updates of normal or alarm status.
➢ Information Collection: Record specific times of alarm issuance and clearance.
➢ Emergency Handling: Notify and execute predefined procedures in case of an alarm.
➢ Alarm Threshold: Consider the open (LISTEN) state of the port as normal, and closed state may require further evaluation.
