User's Manual Part 2

03/24/09 - DRAFT
030-300554 Rev. C 101 March 2009
Verizon FiOS Router
(
Model 9100EM
)
User Guide
13.1 General Firewall Security Settings
This section explains how to configure your Router’s firewall security features. The Router’s firewall security
settings allow you to reduce the risk of unauthorized access to your network by prohibiting certain types of inbound
and outbound network traffic and by allowing you to configure specific firewall rules.
IMPORTANT: If you need help, click Main in the top navigation menu to go to the home page. In the Quick
Links section of the home page, click Verizon Help. Clicking this link takes you to Verizon’s Online Help site,
where you can access additional information about your Router.
To change your firewall security level, click the option button next to the desired security setting. Next, click Apply
to allow the changes to take effect.
General Firewall Settings
Maximum Security
(High)
High security level only allows basic Internet functionality. Only Mail, News, Web,
FTP, VoIP/SIP and IPSEC traffic is allowed. All other traffic is prohibited.
Typical Security
(Medium)
Like High security, Medium security only allows basic Internet functionality by
default. However, Medium security allows customization of Network Address
Translation (NAT) so you can enable certain types of traffic. This is the factory
default security level.
Minimum Security
(Low)
Low security setting will allow all traffic except for known malicious attacks. With
Low security, your Router is visible to other computers on the Internet.
Block IP Fragments This option can prevent hackers from using fragmented data packets to possibly
sabotage your network. Note: Some VPN and UDP services use IP fragments, and
this feature may need to be disabled. If you have questions about this feature, check
with Verizon technical support. It is disabled (box is unchecked) by default.