Cisco Router DPC3925 User Manual
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4021192 Rev B 41 Configure Wireless Settings Section Field Description Basic Settings Wireless Network Enable or Disable the wireless network Wireless Configuration The default is WPS. See Wi-Fi Protected Setup (WPS) (on page 38) for more information about using WPS. Select Manual to manually set up your network using this option. Network Mode Choose one of these options for the network mode: G only, B/G Mixed, B/G/N Mixed (factory default) Important: When TKIP authentication only is selected, B/G/N Mixed network mode is not available. Radio Band Select Enabled 2.4GHz (factory default) or Enabled 5GHz Note: The 5GHz radio band may not be supported on some models. Channel Width Choose Standard - 20 MHz Channel or Wide 40 MHz Channel Standard Channel Select one of the channels from the drop-down list to correspond with your network settings. All devices in your wireless network must broadcast on the same channel in order to communicate. You can select Auto (factory default) for automatic channel selection.
42 4021192 Rev B Configure Wireless Settings Section Field Description Wireless Network Name (SSID) The SSID is the name of your wireless network. The SSID is used by wireless technology to identify your network from other wireless networks in the area. The SSID can be up to 32 characters long. The factory default SSID is typically the last 6 characters of the CM MAC address found on the rating label located on the bottom of your gateway. This SSID is a unique identity and does not need to be changed unless you choose to do so. Your service provider may provide you with wireless setup information that may call for a different SSID. BSSID Displays the Basic Service Set Identifier (BSSID) of your wireless network. The BSSID is typically the MAC Address of the wireless access point. Note: This may not be the same MAC Address as the CM MAC Address used to determine the factory default SSID. Broadcast SSID When this box is checked (factory default), the gateway transmits or advertises its presence to other wireless devices. Client devices can automatically detect the access point when this beacon is enabled. Uncheck this box if you want to hide your network from wireless clients. If you hide your network, you will need to configure each of your wireless client devices manually. Important: The Enable check box is not currently in use and does not impact operation of the gateway. Wireless > Wireless Security Selecting a wireless security mode helps protect your network. If you select Disable, then your wireless network is not secure and any wireless device within range may connect to it. To keep intruders out of your wireless network, use the Wireless Security page to configure your security parameters including the security mode (the level of encryption), encryption keys, and other security settings. Select the Wireless Security tab to open the Wireless Security page. The following table shows examples of the Wireless Security page with various wireless security modes selected.
4021192 Rev B 43 Configure Wireless Settings Wireless Security Page Description Use the descriptions and instructions in the following table to configure the wireless security for the residential gateway. After you make your selections, click Save Settings to apply your changes or Cancel Changes to cancel. Section Field Description Wireless Security Wireless Security Mode Choose one of these options for the security mode: WEP Wired Equivalent Privacy (WEP) security mode is defined in the original IEEE 802.11 standard. This mode is no longer recommended because of its weak security protection. Users are urged to migrate to either WPA-Personal or WPA2-Personal. Note: WPS mode does not support WEP on this device. Field Descriptions Encryption. Select a level of WEP encryption, 40 / 64 bits (10 hex digits) or 104 / 128 bits (26 hex digits). Wireless Passphrase. To complete your wireless security setup, you should choose a wireless passphrase that is easy for you to remember and hard for anyone else to guess. The first time you connect a new wireless device to this network you may need to enter this passphrase into the appropriate setup section in the connected device. To improve your network security, do not give out this passphrase to unauthorized uses. Please enter a phrase of letters and/or numbers from 4 to 24 digits long. Then, click Generate to create the Passphrase. Key 1-4. If you want to manually enter WEP keys, then complete the fields provided. Each WEP key can consist of the letters A through F and the numbers 0 through 9. It should be 10 characters in length for 40/64-bit encryption or 26 characters in length for 104/128-bit encryption. TX Key. Choose a Transmit (TX) Key from 1 to 4. The TX key is the key that will be used to encrypt your data. Although four keys can be created, only one key is used for encrypting data. Select one of the four keys for WEP encryption. Use the selected TX key to set up your wireless clients.
44 4021192 Rev B Configure Wireless Settings Section Field Description WPA Security for Personal Networks – WPA or WPA2 Personal Modes Wi-Fi Protected Access (WPA) is a more secure wireless technology than WEP. WPA can be used for both Enterprise (corporate applications) and Personal (home network) wireless networks. We strongly recommend that you select either WPA-Personal or WPA2-Personal as the security mode for your home network, depending on which mode is supported by the wireless adapter in your PC or wireless clients. WPA-Personal (aka WPA-PSK or WPA-Pre-Shared Key), provides a more secure wireless network that WEP. WPA-Personal introduces TKIP user authentication and stronger encryption keys than WEP. WPA2-Personal (aka WPA2-PSK or WPA2-Pre-Shared Key) provides the most secure standards- based wireless networking. WPA2-Personal incorporates AES (Advanced Encryption Standard) for data transmission. Note: Not all wireless adapters support WPA2. WPA is supported across a wider range of devices. Whether you use WPA or WPA2, make sure to use a ―strong‖ passphrase. A strong passphrase is a string of random characters at least 21 characters in length. Select from one of the following three WPA or WPA2 Personal modes: WPA-Personal WPA2-Personal WPA or WPA2-Personal Field Descriptions Encryption. The default is TKIP+AES. Pre-Shared Key. Enter a key of 8 to 63 characters. Key Renewal. Enter a Key Renewal period, which instructs the device how often it should change encryption keys. The default is 3600 seconds.
4021192 Rev B 45 Configure Wireless Settings Section Field Description Security for Enterprise Networks - WPA-Enterprise Modes This option features WPA used in coordination with a RADIUS server for client authentication. (This should only be used when a RADIUS server is connected to the device.) Select from one of the following three WPA or WPA2 Enterprise modes: WPA-Enterprise WPA2-Enterprise WPA or WPA2-Enterprise Field Descriptions Encryption. The default is TKIP+AES. RADIUS Server. Enter the RADIUS servers IP address. RADIUS Port. Enter the port number used by the RADIUS server. The default is 1812. Shared Key. Enter the key used by the device and RADIUS server. Key Renewal. Enter a Key Renewal period, which instructs the device how often it should change encryption keys. The default is 3600 seconds.
46 4021192 Rev B Configure Wireless Settings Wireless > MAC Filter The MAC Filter feature is used to either allow or block access to your wireless LAN based on the MAC Address of the wireless client devices. The MAC Filter feature, also known as an access list, can be used to help protect your wireless network from access by unauthorized users. Select the MAC Filter tab to open the Wireless MAC Filter page. Wireless MAC Filter Page Description Use the descriptions and instructions in the following table to configure the MAC address filtering for the wireless network for your residential gateway. After you make your selections, click Save Settings to apply your changes or Cancel Changes to cancel. Section Field Description MAC Filter Allows you to Enable or Disable MAC Filtering for the residential gateway
4021192 Rev B 47 Configure Wireless Settings Section Field Description Access Restriction Access Restriction Allows you to permit or block computers from accessing the wireless network. The choice that you make here affects the addresses listed on this page. Choose one of the following options: Block computers listed below from accessing the wireless network. Select this option to deny Internet access to the MAC addresses of the devices you list in the table. All other MAC addresses will be allowed Internet access. Permit computers listed below access to the wireless network. Select this option to allow Internet access only to the MAC addresses of the devices you list in the table. Any MAC addresses not listed in the table will be denied Internet access MAC Address Filter List MAC Address Filter List The MAC Address Filter List displays users whose wireless access you want to control. Click Wireless Client List to display a list of network users by MAC address. From the To Sort by drop-down menu, you can sort the table by IP Address, MAC Address, Status, Interface, or Client Name. To view the most up-to-date information, click the Refresh button. Wireless > Advanced Settings Your advanced wireless settings add another layer of security to the wireless network for your residential gateway. This page is used to set up the advanced wireless functions. Only an expert administrator should adjust these settings. Incorrect settings can reduce wireless performance. Select the Advanced Settings tab to open the Wireless Advanced Settings page. Use this page to configure the following options: N Transmission Rate CTS Protection Mode Beacon Interval DTM Interval Fragmentation Threshold RTS Threshold
48 4021192 Rev B Configure Wireless Settings Wireless Advanced Settings Page Description Use the descriptions and instructions in the following table to configure the advanced wireless settings for your residential gateway. After you make your selections, click Save Settings to apply your changes or Cancel Changes to cancel.
4021192 Rev B 49 Configure Wireless Settings Section Field Description Advanced Wireless N Transmission Rate The rate of data transmission should be set depending on the speed of your Wireless-N networking. Select from a range of transmission speeds, or select Auto to have the device automatically use the fastest possible data rate and enable the Auto-Fallback feature. Auto-Fallback negotiates the best possible connection speed between the device and a wireless client. The factory default setting is Auto. Choose one of the following options for transmission rate: Auto (factory default) Use Legacy Rate 0: 6.5 or 13.5 Mbps 1: 13 or 27 Mbps 2: 19.5 or 40.5 Mbps 3: 26 or 54 Mbps 4: 39 or 81 Mbps 5: 52 or 108 Mbps 6: 58.5 or 121.5 Mbps 7: 65 or 135 Mbps 8: 13 or 27 Mbps 9: 26 or 54 Mbps 10: 39 or 81 Mbps 11: 52 or 108 Mbps 12: 78 or 162 Mbps 13: 104 or 216 Mbps 14:117 or 243 Mbps 15: 130 or 270 Mbps CTS Protection Mode CTS (Clear-To-Send) Protection Mode boosts the devices ability to catch all wireless transmissions, but can severely decrease performance. Select Auto to use this feature when needed, when the Wireless-N/G products are not able to transmit to the device in an environment with heavy 802.11b traffic. Select Disable to permanently disable this feature. Beacon Interval The Beacon Interval value indicates the frequency interval of the beacon. A beacon is a packet broadcast by the device to synchronize the wireless network. (Default: 100 msec, Range: 20-1000)
50 4021192 Rev B Configure Wireless Settings Section Field Description DTIM Interval The Delivery Traffic Indication Message (DTIM) indicates the interval between Broadcasts/Multicast transmissions. DTIM field is a countdown field informing clients of the next window for listening to broadcast and multicast messages. When the device 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. (Default: 1, Range: 1-255) Fragmentation Threshold The fragmentation threshold 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 The RTS Threshold determines at what packet size beyond which the ready to send/clear to send (RTS/CTS) mechanism is invoked. Should you encounter inconsistent data flow, only minor reduction of the default value, 2346, is recommended. If a network packet is smaller than the preset RTS Threshold size, the RTS/CTS mechanism will not be enabled. The device sends Request to Send (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 Clear to Send (CTS) frame to acknowledge the right to begin transmission. The RTS Threshold value should remain at its default value of 2347.