User`s guide

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To change the order of the firewall rules:
Go to the page.FIREWALL > Firewall Rules
Drag rules up or down in the table. If you want a rule to be executed, drag it above the BLOCKALL rule.
After you finish adjusting the order of the firewall rules, click . Otherwise, your changes will not take effect. Save Changes
Pre-Installed Firewall Rules
The Barracuda Firewall comes with a set of pre-installed firewall rules. Initially, you can use the appliance without any changes to these rules.
Eventually, you might want to customize the rules or enable the pre-installed rules that are disabled initially. Understanding the pre-installed rules
can help you create your own rules.
On the page, you can view the following pre-installed firewall rules:FIREWALL > Firewall Rules
P1-P3-BRIDGE
LAN-2-BARRACUDA-SERVERS
LOCALDNSCACHE-WIFI
LOCALDNSCACHE
TRANSPARENT-PROXY-WIFI
TRANSPARENT-PROXY
LAN-2-INTERNET-SIP
INTERNET-2-LAN-SIP
LAN-2-INTERNET
WIFI-2-INTERNET
LAN-2-LAN
VPNCLIENTS-2-LAN
WIFI-2-LAN
BLOCKALL
P1-P3-BRIDGE
This rule creates a bridge between port p1 and port p3. All traffic passes between the two ports. The rule is useful when you first get the
Barracuda Firewall and want to evaluate the appliance at your desk. Follow the instructions in the toBarracuda Firewall Quick Start Guide
connect port p1 to the LAN and port p3 to your PC. This configuration gives the Barracuda Firewall access to the Internet, lets you look at traffic,
and lets you continue to use your PC for other purposes during the evaluation period.
When you are finished with your evaluation and move the Barracuda Firewall into production, you can delete this rule.
LAN-2-BARRACUDA-SERVERS
This rule allows the traffic from the trusted LAN to reach the Barracuda Networks update servers. The rule is required for initial activation as well
as ongoing firmware and security updates.
LOCALDNSCACHE-WIFI
This rule automatically redirects all DNS requests from a separate Wi-Fi network on interface ath0 to the local caching DNS service of the
Barracuda Firewall. The rule is useful for reducing the amount of DNS traffic over the WAN connection and improving DNS resolution speed as
well as security.
If you configure a DNS server in your local network, create a firewall rule that allows TCP and UDP traffic on port 53 from the IP addresses of your
local DNS servers to the Internet. Place this rule above the LOCALDNSCACHE and LOCALDNSCACHE-WIFI rules.
LOCALDNSCACHE
This rule automatically redirects all DNS requests from the trusted LAN to the local caching DNS service of the Barracuda Firewall. The rule is
useful for reducing the amount of DNS traffic over the WAN connection and improving DNS resolution speed as well as security.
If you configure a DNS server in your local network, create a firewall rule that allows TCP and UDP traffic on port 53 from the IP addresses of
your local DNS servers to the Internet. rule above the LOCALDNSCACHE and LOCALDNSCACHE-WIFI rules.You should place this
TRANSPARENT-PROXY-WIFI
If enabled, this rule automatically redirects all HTTP requests on TCP port 80 from a separate Wi-Fi network on interface ath0 to the local proxy
of the Barracuda Firewall. Depending on the proxy configuration ( > ), web traffic is either scanned by Barracuda Web SecurityNETWORK Proxy