Firewall Tab - General; Figure 6-36: Firewall - Linksys RV082 User Manual

10/100 8-Port VPN Router

Firewall Tab - General

From the Firewall Tab, you can configure the Router to deny or allow specific internal users from accessing the
Internet. You can also configure the Router to deny or allow specific Internet users from accessing the internal
servers. You can set up different packet filters for different users that are located on internal (LAN) side or
external (WAN) side based on their IP addresses or their network Port number. See Figure 6-36.
Firewall: The default is enabled. If users disable the Firewall function, SPI, DoS, Block WAN Request will be
disabled, Remote Management will be enabled and Access Rules and Content Filter will be disabled.
SPI (Stateful Packet Inspection): The Router's Firewall uses Stateful Packet Inspection to maintain connection
information that passes through the firewall. It will inspect all packets based on the established connection, prior
to passing the packets for processing through a higher protocol layer.
DoS (Denial of Service): Protect internal networks from Internet attacks, such as SYN Flooding, Smurf, LAND, Ping

Figure 6-36: Firewall

of Death, IP Spoofing and reassembly attacks.
Block WAN Request: This feature is designed to prevent attacks through the Internet. When it is enabled, the
Router will drop both the unaccepted TCP request and ICMP packets from the WAN side. The hacker will not find
the Router by pinging the WAN IP address. If DMZ is enabled, this function will be disabled.
Remote Management: This Router supports remote management. If you want to manage this Router through the
WAN connection, click Enable. You can select port 80 or port 8080 for remote management.
Multicast Pass Through: IP Multicasting occurs when a single data transmission is sent to multiple recipients at
the same time. Using this feature, the Router allows IP multicast packets to be forwarded to the appropriate
computers.
MTU (Maximum Transmission Unit): This feature specifies the largest packet size permitted for network
transmission. It is recommended that you enable this feature. The default of MTU size is 1500 bytes.
Chapter 6: Set Up and Configure the Router 35
Firewall Tab - General