PADS4 network and firewall requirements

Reference of TCP, UDP, and HTTP ports used by PADS4 server and client components, including default port 7237 and required inbound or outbound firewall rules.

This page explains which network ports PADS4 uses. The port numbers listed are the default settings. You can adjust some ports.

The network communication between the components of the PADS4 system uses TCP/IP. PADS4 uses one port to communicate. The default port is 7237.

If you use a firewall on the PADS4 Server, open one or more of the port numbers listed below so that PADS4 can communicate over the network.

On the client side, it’s not necessary to open any port numbers in the firewall.

PADS4 Server ports used with external connections

Port	Protocol	Firewall rules	Description
7237	TCP	Inbound	Default port used for PADS4 communication
3702	UDP	Inbound	Required for PADS4 server search function (discover network functionality)
4525 or 443	HTTP	Outbound	Online activation (only one port has to be available)
80 and/or 443	HTTP	Inbound / Outbound	Software updates and replication when using more servers
7	UDP	Outbound	Wake On LAN function (standard WOL port)
9	UDP	Outbound	Wake On LAN function (standard WOL port)
123	UDP	Inbound / Outbound	Required for NTP (Network Time Protocol for Viewer time synchronization)

PADS4 Server local ports

PADS4 uses these ports locally only.

Port	Protocol	Description
15672	HTTP	Used by RabbitMQ for HTTP API connection
15671	HTTP	Used by RabbitMQ https for HTTP API over TLS connection
5672	TCP	Used by RabbitMQ AMQP
5671	TCP	Used by RabbitMQ AMQP over TLS

PADS4 Viewer ports

Port	Protocol	Firewall rules	Description
7237	TCP	Outbound	Default port used for PADS4 communication
3702	UDP	Outbound	Required for PADS4 server search function (discover network functionality)
7	UDP	Inbound	Wake On LAN function (standard WOL port)
9	UDP	Inbound	Wake On LAN function (standard WOL port)
123	UDP	Inbound / Outbound	Required for NTP (Network Time Protocol for Viewer time synchronization)

PADS4 HTML5 Viewer ports

Port 80 and/or 443 (HTTP)

Note

PADS4 has built-in features to automatically detect a PADS4 Server in your network. However, PADS4 can only detect a PADS4 Server automatically when no firewall on the server PC or elsewhere in the network blocks UDP port 3702.

Version 2021.3 introduces a new mechanism that replicates both ways. Changes on the Sub/Backup Server are synchronized with the Main Server and changes from the Main are synchronized with the Sub/Backup Servers.