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.

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.

Stateful Packet Inspection (SPI)
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.

Denial of Service (DoS)
Protect internal networks from Internet attacks, such as SYN Flooding, Smurf, LAND, Ping 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, you have to 'Enable' this option. User can enter the port number for remote management.

HTTPS (HyperText Transfer Protocol Secure)
HTTPS is a secured http session. Users can enable HTTPS for secured management. HTTPS encrypts the communications among connected clients and servers to provide data confidentiality. The default is disabled. (Note: If you will use the Linksys Quick VPN Client Software for allowing VPN Clients to connect to the RV082, please enable the HTTPS.)

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, and the default of MTU size is 1500 bytes.

Restrict WEB Features

RV082 supports the following filtering for web protocol. Block:
Java: Java is a programming language for websites. Some web sites contain small programs, and it may be dangerous to run an unknown program on your machine. You can check the Java box to filter the Java Applets for security reason, but you may take the risk of not having access to Internet sites which created using this programming language if Java is blocked.
Cookies: A cookie is data stored on your PC and used by Internet sites when you interact with them. Cookies are usually used to track visitors, and store information about their personal preferences. You can check the Cookies box to block Cookies in order to maintain a higher level of anonymity on the Web.
Active X: Active X is a programming language for websites. Some web sites contain small programs, and it may be dangerous to run an unknown program on your machine. You can check the Active X box to filter the Active X for security reason, but you may take the risk of not having access to Internet sites which created using this programming language if Active X is blocked.
Access to HTTP Proxy Servers: Use of Proxy Servers may compromise the Router’s security. You can check the box to enable proxy filtering, and it will disable access to any proxy servers.

Don’t block Java/ActiveX/Cookies to Trusted Domain: If the box is checked, users can enter the web sites or IP address in Trusted Domain field, and the Router will not check the Java/ActiveX/Cookies in the Trusted Domain(s).

Click the Save Settings button when you finish the settings, or click the Cancel Changes button to undo your changes.