NOTE: Refer to your firewall documentation on how to configure the firewall port settings and how to add HP files to the “trusted“ list.

Some firewalls continue to cause interference even after you disable them. If you continue to have problems after configuring the firewall as described above and if you are using a computer running Windows, you might need to uninstall the firewall software in order to use the printer over the network.

Advanced firewall information

The following ports are also used by your printer and might need to be opened on your firewall configuration. Incoming ports (UDP) are destination ports on the computer while outgoing ports (TCP) are destination ports on the printer.

•Incoming (UDP) ports: 137, 138, 161, 427

•Outgoing (TCP) ports: 137, 139, 427, 9100, 9220, 9500

The ports are used for the following functions:

Printing

•UDP ports: 427, 137, 161

•TCP port: 9100

Photo card upload

•UDP ports: 137, 138, 427

•TCP port: 139

Scanning

•UDP port: 427

•TCP ports: 9220, 9500

HP printer status

UDP port: 161

Faxing

•UDP port: 427

•TCP port: 9220

HP printer installation

UDP port: 427

Solve printer management problems

This section provides solutions to common problems that involve managing the printer. This section contains the following topic:

•EWS cannot be opened

Solve printer management problems

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HP 6500A - E710a manual Solve printer management problems, Advanced firewall information, Incoming UDP ports 137, 138, 161