Linksys E2000 manual Security Firewall, Internet Filter, Web Filter

Linksys E2000

CTS Protection Mode  The Router automatically uses CTS (Clear-To-Send) Protection Mode when your Wireless-N and Wireless-G devices are experiencing severe problems and are not able to transmit to the Router in an environment with heavy 802..11b traffic..This option boosts the Router’s ability to catch all Wireless-N and Wireless-G transmissions but severely decreases performance.. To use this option, keep the default, Auto.. To disable this option, select Disabled..

Beacon Interval  A beacon is a packet broadcast by the Router to synchronize the wireless network.. The Beacon Interval value indicates the frequency interval of the beacon.. Enter a value between 20 and 65,535 milliseconds.. The default value is 100..

DTIM Interval  This value, between 1 and 255, indicates the interval of the Delivery Traffic Indication Message (DTIM).. A DTIM field is a countdown field informing clients of the next window for listening to broadcast and multicast messages.. When the Router has buffered broadcast or multicast messages for associated clients, it sends the next DTIM with a DTIM Interval value.. Its clients hear the beacons and awaken to receive the broadcast and multicast messages.. The default value is 1..

Fragmentation Threshold  This value specifies the maximum size for a packet before data is fragmented into multiple packets.. If you experience a high packet error rate, you may slightly increase the Fragmentation Threshold.. Setting the Fragmentation Threshold too low may result in poor network performance.. Only minor reduction of the default value is recommended.. In most cases, it should remain at its default value of 2346..

RTS Threshold  Should you encounter inconsistent data flow, only minor reduction of the default value, 2347, is recommended.. If a network packet is smaller than the preset Request to Send (RTS) threshold size, the RTS/CTS (Clear to Send) mechanism will not be enabled.. The Router sends RTS frames to a particular receiving station and negotiates the sending of a data frame.. After receiving an RTS, the wireless station responds with a CTS frame to acknowledge the right to begin transmission.. The RTS Threshold value should remain at its default value of 2347..

Click Save Settings to apply your changes, or click Cancel Changes to clear your changes..

Chapter 3: Advanced Configuration

Security > Firewall

The Firewall screen is used to configure a firewall that can filter out various types of unwanted traffic on the Router’s local network..

Security > Firewall

Firewall

SPI Firewall Protection  To use firewall protection, keep the default selection, Enabled.. To turn off firewall protection, select Disabled..

Internet Filter

Filter Anonymous Internet Requests  This option makes it more difficult for outside users to work their way into your network.. This option is enabled by default.. Disable it to allow anonymous Internet requests..

Filter Multicast  The multicasting feature allows for multiple transmissions to specific recipients at the same time.. If multicasting is permitted, then the Router will allow IP multicast packets to be forwarded to the appropriate computers.. Select this option to enable the filter.. This option is disabled by default..

Filter Internet NAT Redirection  This option is used to prevent a local computer from using a URL or Internet address to access the local server.. Select this option to enable the filter.. This option is disabled by default..

Filter IDENT (Port 113)  The Filter IDENT (Identification) option keeps port 113 from being scanned by devices outside of your local network.. This option is enabled by default.. Disable it to allow port 113 to be scanned..

Web Filter

Proxy  Use of WAN proxy servers may compromise the Gateway’s security.. Denying Proxy will disable access to any WAN proxy servers.. Select this option to enable proxy filtering.. Deselect the option to allow proxy access..

Advanced Wireless-N Router 27