Efficient Networks 5100 Series - Manual (Page 76)

SpeedStream Router User Guide
Firewall Security Levels
The SpeedStream router is shipped with a set of preconfigured firewall database rules grouped into levels,
allowing you to easily configure the firewall. The default set of levels include:
Off:
No restrictions are applied to either inbound or outbound traffic.
In addition, all Network Address Port
Translation (NAPT) functionality is disabled - there is no address/port translation. Since there is no
address/port translation when the firewall is placed in this mode, all LAN-side connected hosts must
be assigned a valid public IP address.
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Low:
Minimal restrictions with respect to outbound traffic. Outbound traffic is allowed for all supported IP-
based applications and Application Level Gateways (ALGs). The only inbound traffic that is allowed
is that which is received within the context of an outbound session initiated on the local host and
permitted by this firewall mode.
Medium:
Moderate restrictions with respect to outbound traffic. Outbound traffic is allowed for most supported
IP-based applications and Application Level Gateways (ALGs). The only inbound traffic that is
allowed is that which is received within the context of an outbound session initiated on the local host
and permitted by this firewall mode.
High:
High restrictions with respect to outbound traffic. Outbound traffic is allowed only for a very
restricted set of supported IP-based applications and ALGs. The only inbound traffic that is allowed is
that which is received within the context of an outbound session initiated on the local host and
permitted by this firewall mode.
ICSA 3.0a-compliant:
Supports the ICSA Labs criteria for firewall behavior. (For more information, visit the ICSA site at
http://www.icsalabs.com)
Custom:
Allows advanced users to add, modify and delete their own firewall rules.
Note For specific application and protocol security modes, refer to Appendix D, “Firewall Security
Levels.”
Select the Firewall Security Level
1. On the main menu, click Setup, then click Firewall, and then click Simple Setup.
The Firewall – Simple Setup & Control
window displays.
2. Select the level from the Select Firewall
Level list.
3. To accept your selection, click Apply.
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