Cisco Systems WRVS4400NRF manual Click Save

Setting Up and Configuring the WRVS4400N Wireless-N Router	5
Configuring Firewall Settings

•Multicast Pass-through—When enabled, the router allows IP Multicast traffic to come in from the Internet. The default is Disable.

•SIP Application Layer Gateway—When enabled, the SIP Application Layer Gateway (ALG) allows Session Initiation Protocol (SIP) packets (used for Voice over IP) to traverse the NAT firewall. This feature can be disabled if the VoIP service provider is using other NAT traversal solutions such as STUN, TURN, and ICE.

•Block—Select the Web features that you wish to restrict. All those features could place security concern to your personal computers on the LAN side. You have to balance your needs on those applications and security. The default is unselected.

-Java—Java is a programming language for websites. If you deny Java, you run the risk of not having access to Internet sites created using this programming language.

-Cookies—A cookie is data stored on your personal computer and used by Internet sites when you interact with them, so you may not want to deny cookies.

-ActiveX—ActiveX is a Microsoft (Internet Explorer) programming language for websites. If you deny ActiveX, you run the risk of not having access to Internet sites using this programming language. Also, Windows Update uses ActiveX, so if this is blocked, Windows Update does not work.

-Access to Proxy HTTP Server—If local users have access to WAN proxy servers, they may be able to circumvent the router's content filters and access Internet sites blocked by the router. Denying Proxy blocks access to any WAN proxy servers.

STEP 3 Click Save.

Cisco WRVS4400N Wireless-N Gigabit Security Router with VPN Administration Guide 90