HP C309 - Manual (Page 13)

1. In the firewall configuration utility, look for an option to trust computers on the local
subnet (sometimes called the “scope” or “zone”). By trusting all computers on the
local subnet, computers and devices in your home can communicate with each other
while still being protected from the internet. This is the easiest approach to use.
2. If you do not have the option to trust computers on the local subnet, add incoming
UDP port 427 to your firewall's list of allowed ports.
NOTE: Not all firewalls require you to differentiate between incoming and
outgoing ports, but some do.
Another common problem is that HP software is not trusted by your firewall to access the
network. This can happen if you answered "block" to any firewall dialog boxes that
appeared when you installed the HP software.
If this occurs, check that the following programs are in your firewall's list of trusted
applications; add any that are missing.
• hpqkygrp.exe, located in C:\program files\HP\digital imaging\bin
• hpiscnapp.exe, located in C:\program files\HP\digital imaging\bin
• hpqste08.exe, located in C:\program files\HP\digital imaging\bin
• hpqtra08.exe, located in C:\program files\HP\digital imaging\bin
• hpqthb08.exe, located in C:\program files\HP\digital imaging\bin
NOTE: Refer to your firewall documentation on how to configure the firewall port
settings and how to add HP files to the "trusted" list.
NOTE: Some firewalls continue to cause interference even after you disable them.
If you continue to have problems after configuring the firewall as described above,
you might need to uninstall the firewall software in order to use the product over the
network.
Advanced firewall information
The following ports are also used by your HP product 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 HP product.
• 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
Product status
UDP port: 161
Faxing
• UDP port: 427
• TCP port: 9220
Product installation
UDP port: 427
Advanced firewall information 11
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