netipv4ip_local_port_range

The net.ipv4.ip_local_port_range is a kernel parameter that defines the range of local (ephemeral) ports that can be used by applications and services on a Linux system. Ephemeral ports are temporary ports used by the operating system for outgoing network connections.

The default value of net.ipv4.ip_local_port_range is 32768 to 60999, which means that any outgoing connection from a Linux system will use a port number within this range. This range is reserved for ephemeral ports and should not be used for any other purpose.

The net.ipv4.ip_local_port_range parameter can be modified to increase or decrease the range of local ports available for use. However, changing this parameter can affect the performance and stability of the system, and should only be done by experienced administrators who understand the consequences of their actions