User`s guide

Configuring your Corporate Firewall and Updating Firmware
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Barracuda Spam Firewall User’s Guide
5. Go to the BASIC-->Administration page and do the following:
a. Assign a new administration password to the Barracuda Spam Firewall (optional).
b. Make sure the local time zone is set correctly.
Time on the Barracuda Spam Firwewall is automatically updated via NTP (Network Time
Protocol) and therefore requires port 123 to be open for inbound and outbound UDP traffic on
your firewall (if the Barracuda Spam Firewall is located behind one).
It is important that the timezone be set correctly because this information is used to determine
the delivery times for messages and may appear in certain mail reading programs.
c. Click Save Changes.
Your Barracuda Spam Firewall is now configured and will start filtering all emails it receives and route
the good email to your email server.
Configuring your Corporate Firewall and Updating Firmware
If your Barracuda Spam Firewall is located behind a corporate firewall, you need to open specific ports
to allow appropriate communication between the system and remote servers. You can then download
the latest firmware version (if needed) for the Barracuda Spam Firewall.
To configure your corporate firewall and download the latest firmware version:
1. Configure your corporate firewall. Refer to the following table for the ports that need to be opened.
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When your Barracuda Spam Firewall is behind a corporate firewall, you need to do a port redirection (also called port
forwarding) of incoming SMTP traffic (port 25) to the Barracuda Spam Firewall.
2. If appropriate, change the NAT routing of your corporate firewall to route incoming email to the
Barracuda Spam Firewall. Consult your corporate firewall documentation or your corporate
firewall administrator to make the necessary changes.
Port Direction Protocol Usage
22 In TCP Remote diagnostics and service (optional)
25
1
In/Out TCP Email and email bounces
53 Out TCP Domain Name Server (DNS)
80 Out TCP Virus, firmware and spam rule updates
123 Out UDP NTP (Network Time Protocol)
2703 Out TCP Incoming email fingerprints
6277 Out TCP Incoming email fingerprints