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33

4

4.   

Security

Keeping unwanted content out of your network

This chapter explains how to prevent objectionable content from reaching the computers and 
other devices that are connected to your network. 

This chapter includes the following sections:

•

Keyword Blocking of HTTP Traffic 

•

Block Services (Port Filtering) 

•

Security Event Email Notifications 

Содержание CG3300CMR

Страница 1: ...350 East Plumeria Drive San Jose CA 95134 USA September 2012 202 11068 02 v1 0 Wireless Cable Gateway CG3300CMR User Manual...

Страница 2: ...mation card Trademarks NETGEAR the NETGEAR logo and Connect with Innovation are trademarks and or registered trademarks of NETGEAR Inc and or its subsidiaries in the United States and or other countri...

Страница 3: ...of the Router to Optimize Wireless Connectivity 16 Wireless Screen 16 Wireless Screen Fields 18 Attached Devices 19 Guest Networks 20 Guest Network Wireless Security Options 21 Chapter 3 genie Advance...

Страница 4: ...ering 59 Remote Computer Access Basics 59 Port Triggering to Open Incoming Ports 60 Port Forwarding to Permit External Host Communications 61 How Port Forwarding Differs from Port Triggering 63 Set Up...

Страница 5: ...5 Wireless Cable Gateway CG3300CMR Appendix A Supplemental Information Factory Default Settings 79 Technical Specifications 80 Appendix B Notification of Compliance Index...

Страница 6: ...f your gateway and includes these sections Gateway Front Panel Gateway Rear Panel Gateway Label Log In To Your Gateway View the Gateway Home Screens Add Wireless Devices or Computers to Your Network N...

Страница 7: ...eway CG3300CMR Gateway Front Panel Power Downstream Upstream Internet LAN Ethernet WPS Wireless On Off Note For optimal performance place the gateway vertically in the stand Do not mount this unit to...

Страница 8: ...canning for an upstream channel Off No upstream channel is locked Internet Solid green The cable modem is online Blinking The cable modem is synchronizing with the CMTS of the cable provider Off The c...

Страница 9: ...e these ports to connect local computers Restore Factory Settings button You can return the gateway to its factory settings Press and hold the Restore Factory Settings button for over 7 seconds The ga...

Страница 10: ...facturer Channel Well Technology Co Ltd Model SAL018F2 Adaptor of PI Manufacturer PI Electronics H K Ltd Model AD817000 Gateway Label The label on the bottom of the gateway shows the WPS PIN login inf...

Страница 11: ...see the instructions that came with your computer The gateway automatically logs you out after 5 minutes of no activity To log in to the gateway 1 On the computer that is connected to the gateway with...

Страница 12: ...e gateway Basic Home screen has a dashboard that lets you see the status of your Internet connection and network at a glance You can click any of the sections of the dashboard to view more detailed in...

Страница 13: ...asic settings see Chapter 2 genie Basic Settings Advanced Home Screen Note Using the Advanced Home screen requires a solid understanding of networking concepts To view the Advance Home screen select t...

Страница 14: ...ess Devices or Computers to Your Network See Guest Networks on page 20 for instructions on how to set up a guest network To add wireless devices or computers to your network 1 Open the software that m...

Страница 15: ...Internet connection and network This chapter explains the features available from the genie Basic Home screen that is shown in the following figure This chapter contains the following sections Wireles...

Страница 16: ...r inability to connect wirelessly to the gateway Wireless Screen The Wireless screen lets you view or configure the wireless network setup The wireless cable gateway comes with preset security This fe...

Страница 17: ...evices and computers to make sure that they can connect wirelessly If they do not check the following Is your wireless device or computer connected to your network or another wireless network in your...

Страница 18: ...ess channel that the gateway uses Choose a value from 1 through 13 For products in the North America market only Channels 1 through 11 can be operated Do not change the channel unless you experience i...

Страница 19: ...display the following screen Wired devices are connected to the gateway with Ethernet cables Wireless devices have joined the wireless network IP Address The IP address that the gateway assigned to th...

Страница 20: ...selected the guest network is enabled and guests can connect to your network using the SSID of this profile Enable SSID Broadcast If this check box is selected the wireless access point broadcasts its...

Страница 21: ...al means that the product complies with the worldwide single standard for high speed wireless local area networking that the Wi Fi Alliance http www wi fi org established WPA PSK uses a passphrase to...

Страница 22: ...features available from the genie Advanced Home screen that is shown in the following figure This chapter contains the following sections Setup Menu WAN Setup LAN Setup Some selections on the Advanced...

Страница 23: ...on page 24 Wireless Setup This menu item is a shortcut to the same Wireless screen that you can access from the dashboard on the Basic Home screen See Wireless on page 16 Guest Network This menu item...

Страница 24: ...ddress and DNS server The default settings usually work fine If you have problems with your connection check the ISP settings 3 Click Apply to save your settings Internet Setup Screen Fields The follo...

Страница 25: ...ubnet Mask 255 255 255 0 Gateway IP Address 24 218 156 1 Domain Name Server DNS Address The DNS server is used to look up site addresses that are based on their names If your ISP gave you one or two D...

Страница 26: ...he firewall security less effective See Default DMZ Server on page 27 for more details Respond to Ping on Internet Port If you want the gateway to respond to a ping from the Internet select this check...

Страница 27: ...creen Instead of discarding this traffic you can have it forwarded to one computer on your network This computer is called the default DMZ server To set up a default DMZ server 1 On the WAN Setup scre...

Страница 28: ...e default value This size is the typical setting for non PPPoE non VPN connections and is the default value for NETGEAR gateways adapters and switches 1492 Used in PPPoE environments 1472 Maximum size...

Страница 29: ...dressing scheme make those required changes in the LAN Setup screen To change the LAN settings Note If you change the LAN IP address of the gateway while connected through the browser you are disconne...

Страница 30: ...settings Use the Gateway as a DHCP Server By default the gateway functions as a DHCP server This capability allows the gateway to assign IP DNS server and default gateway addresses to all computers co...

Страница 31: ...s service is not enabled and no other DHCP server is available on your network set the IP addresses of your computer manually or other devices cannot access the gateway Address Reservation When you sp...

Страница 32: ...e it here 4 Click Apply to enter the reserved address into the table The reserved address is not assigned until the next time the computer contacts the DHCP server of the gateway Reboot the computer o...

Страница 33: ...r explains how to prevent objectionable content from reaching the computers and other devices that are connected to your network This chapter includes the following sections Keyword Blocking of HTTP T...

Страница 34: ...urn on keyword blocking 3 In the keyword field enter a keyword or domain click Add URL Keyword and click Apply The keyword list supports up to 32 entries Here are some sample entries Specify XXX to bl...

Страница 35: ...port number in the transmitted IP packets For example a packet that is sent with the destination port number 80 is an HTTP web server request The service numbers for many common protocols are defined...

Страница 36: ...ble Gateway CG3300CMR To block services 1 Select Advanced Security Block Services to display the following screen 2 Select one of the service blocking options Never Turn off service blocking Always Tu...

Страница 37: ...ppear select User Defined 5 For User Defined select the protocol and enter the name and the range of port numbers of the service For known services these fields are filled in automatically If you know...

Страница 38: ...g Mail Server field enter the name of the outgoing SMTP mail server of your ISP such as mail myISP com You can find this information in the configuration screen of your email program When this field i...

Страница 39: ...R After the log is sent the log is cleared from the memory of the gateway If the gateway cannot email the log file the log buffer fills up In this case the gateway overwrites the log and discards its...

Страница 40: ...ibes the gateway settings for administering and maintaining your gateway and home network This chapter includes the following sections View Gateway Status View Logs of Web Access or Attempted Web Acce...

Страница 41: ...0CMR View Gateway Status To view gateway status and usage information Select Advanced Home or select Administration Router Status to display the following screen For a description of the Attached Devi...

Страница 42: ...the user interface System Up Time The length of time that the system has been operating LAN Port MAC Address The Media Access Control address This address is the unique physical address that the Ether...

Страница 43: ...to the Internet Duration The time that the unit has been up so far Expires Expiration time for the WAN DHCP lease WAN Subnet Mask The IP subnet mask that the Internet WAN port of the gateway uses WAN...

Страница 44: ...the gateway and to get details about the downstream and upstream cable channel The time is displayed after the gateway is initialized The gateway automatically goes through the following steps in the...

Страница 45: ...tice interference from nearby devices you can select a different channel Channels 1 6 and 11 do not interfere with each other Mode Indicates the wireless communication mode Up to 54 Mbps Up to 145 Mbp...

Страница 46: ...AR_Guest_0 Wireless AP Indicates whether the radio feature of the gateway is enabled If this feature is not enabled the Wireless LEDs on the front panel are off Broadcast Name Indicates whether the ga...

Страница 47: ...inistration Logs The Logs screen displays The log screen shows the following information Date and time The date and time the log entry was recorded Source IP The IP address of the initiating device fo...

Страница 48: ...ay events To view the event logs Select Advanced Administration Event Logs The Event Logs screen displays The log screen shows the following information Time The time the event log entry was recorded...

Страница 49: ...efault settings Back Up Settings To back up the configuration settings of the gateway 1 Select Advanced Administration Backup Settings to display the following screen 2 Click Back Up to save a copy of...

Страница 50: ...example if you move the gateway to a different network or if you have forgotten the password you want to erase the configuration and restore the factory default settings Either press the Restore Fact...

Страница 51: ...assword for wireless access The label on the bottom of your gateway shows your unique wireless network name SSID and password for wireless access see Gateway Label on page 10 To set the password for t...

Страница 52: ...d is for people who want to set up the gateway for unique situations such as when remote access from the Internet by IP or domain name is needed This chapter includes the following sections Advanced W...

Страница 53: ...n of the wireless gateway by clearing this check box Select this check box again to enable the wireless portion of the gateway When the wireless radio is disabled other members of your household can u...

Страница 54: ...y than normal traffic For WMM to function properly wireless clients have to support WMM also Note The Fragmentation Length CTS RTS Threshold and Preamble Mode options are reserved for wireless testing...

Страница 55: ...List button display the Wireless Card Access List screen On this screen you can restrict access to your network to specific devices based on their MAC address 2 Select the Turn Access Control On chec...

Страница 56: ...computers and devices and their Ethernet MAC addresses 2 If the wireless computer or device you want appears in the list click its radio button to capture its MAC address Otherwise manually enter the...

Страница 57: ...reen select the Turn Access Control On check box to enable access control 7 On the Wireless Card Access Setup screen click Apply to save changes and return to the Advanced Wireless Settings screen Nea...

Страница 58: ...and protects against denial of service DoS attacks When IPSec Pass Through is enabled IPSec traffic is forwarded When it is disabled this traffic is blocked When PPTP Pass Through is enabled PPTP tra...

Страница 59: ...ess information Before forwarding your message to the remote computer your gateway has to modify the source information and create and track the communication session so that replies can be routed bac...

Страница 60: ...gateway sends this reply message to your computer which displays the web page from www example com The message now contains the following address and port information Source address The IP address of...

Страница 61: ...ge to destination port 33333 your gateway checks its session table to determine whether there is an active session for port number 33333 Finding an active session the gateway restores the original add...

Страница 62: ...or a web server process The remote computer then sends this request message through the Internet to your gateway 2 Your gateway receives the request message and looks in its rules table for any rules...

Страница 63: ...rtain types of incoming traffic to reach servers on your local network For example you want to make a local web server FTP server or game server visible and available to the Internet Use the Port Forw...

Страница 64: ...ddress field enter the last digit of the IP address of your local computer that provides this service 4 Click Add The service appears in the list in the screen Add a Custom Service To define a service...

Страница 65: ...port enter the same port number in the Ending Port field If the application uses a range of ports enter the ending port number of the range in the Ending Port field 7 In the Internal IP Address field...

Страница 66: ...dynamic extension of port forwarding that is useful in these cases More than one local computer needs port forwarding for the same application but not simultaneously An application opens incoming port...

Страница 67: ...Triggering check box if it is selected Note If the Disable Port Triggering check box is selected after you configure port triggering port triggering is disabled However any port triggering configurat...

Страница 68: ...ct the service type either TCP or UDP or both TCP UDP If you are not sure select TCP UDP 10 In the Triggering Port field enter the number of the outbound traffic port that causes the inbound ports ope...

Страница 69: ...a client that can connect to the Dynamic DNS service that is provided by DynDNS org First visit their website at http www dyndns org and obtain an account and host name that you configure in the gate...

Страница 70: ...or key for your Dynamic DNS account 8 Click Apply to save your configuration Cable Status For information about this topic see Cable Connection Status on page 44 Universal Plug and Play Universal Plu...

Страница 71: ...1440 minutes The default period is 30 minutes Shorter durations ensure that control points have current device status at the expense of additional network traffic Longer durations can compromise the f...

Страница 72: ...ngs IPv6 You can use this feature to display the IPv6 Internet connection type To display the IPv6 Internet connection readings Select Advanced Advanced Setup IPv6 to display the following screen The...

Страница 73: ...t is facing hosts on the subscriber side of the gateway This interface derives its IPv6 provisioning using the IPv6 prefix that is supplied by the MSO provisioning server LAN IPv6 Prefix IPv6 Hosts A...

Страница 74: ...t the ISP Connection on page 76 I cannot remember the configuration password of the gateway or I want to clear the configuration and start over again Go to Factory Default Settings on page 79 Tip NETG...

Страница 75: ...he gateway and at the hub or computer Make sure that power is turned on to the connected hub or computer Be sure that you are using the correct cable Internet LED is off and the gateway is connected t...

Страница 76: ...default password of password If the gateway does not save changes you have made check the following When entering configuration settings be sure to click the Apply button before moving to another scr...

Страница 77: ...that the Ethernet card driver software and TCP IP software are both installed and configured on your computer or workstation Verify that the IP address for your gateway and your workstation are correc...

Страница 78: ...ear the center of the area in which your computers operate In an elevated location such as a high shelf where the wirelessly connected computers have line of sight access even if through walls Away fr...

Страница 79: ...ion settings shown in the following table Factory Default Settings Gateway login User login URL http 192 168 1 1 User name and password case sensitive admin password Local network LAN LAN IP 192 168 1...

Страница 80: ...11 specifications Actual throughput will vary Network conditions and environmental factors including volume of network traffic building materials and construction and network overhead may lower actua...

Страница 81: ...l Information 81 Wireless Cable Gateway CG3300CMR Interface Local 10BASE T 100 1000BASE Tx RJ 45 802 11n g b Internet DOCSIS 3 0 Downward compatible with DOCSIS 2 0 1 1 and 1 0 Technical Specification...

Страница 82: ...ce standards EN300 328 2 4Ghz EN301 489 17 EN60950 1 For complete DoC visit the NETGEAR EU Declarations of Conformity website at http support netgear com app answers detail a_id 11621 EDOC in Language...

Страница 83: ...en van richtlijn 1999 5 EG Malti Maltese Hawnhekk NETGEAR Inc jiddikjara li dan Radiolan jikkonforma mal htigijiet essenzjali u ma provvedimenti ohrajn relevanti li hemm fid Dirrettiva 1999 5 EC Magya...

Страница 84: ...e and This device must accept any interference received including interference that may cause undesired operation FCC Radio Frequency Interference Warnings Instructions This equipment has been tested...

Страница 85: ...xposure limits set forth for an uncontrolled environment This equipment should be installed and operated with minimum distance 20cm between the radiator your body Caution Ce dispositif est conforme la...

Страница 86: ...port forwarding 64 D dashboard 12 data packets fragmented 27 default DMZ server 27 default factory settings 50 deleting configuration 50 keywords 34 port forwarding entry 65 denial of service DoS pro...

Страница 87: ...ases changing 18 product label 10 ping utility 76 port filtering 35 port forwarding 59 61 63 port numbers 35 port triggering 59 60 63 66 Preamble mode 54 preset security about 16 passphrase 18 R radio...

Страница 88: ...el 18 wireless mode 18 wireless network name SSID broadcasting 18 described 18 53 product label 10 wireless network settings 18 53 wireless radio 53 wireless security options 21 wireless settings 16 1...

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