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Cox Business 3848 User Manual

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Cox Business Internet Gateway 3848
User Guide

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  • Page 1 Cox Business Internet Gateway 3848 User Guide...
  • Page 2 ©2020 by Cox Communications, Inc. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of Cox Communications. 0120...

  • Page 3: Table Of Contents

    Table of Contents Table of Contents Overview of the 3848 Wireless Gateway ................1 Front Panel Description ......................2 Back Panel ................................3 Top Panel Description ......................4 Installing the DOCSIS 3.0 3848 Gateway ................5 Install the Wireless Gateway ....................5 Connect Devices to the Wireless Gateway ......................
  • Page 4 Administration, Diagnostic, Maintenance Tools ..............39 Backup and Restore ......................39 User Provisioning for Backup and Restore ...................... 39 Configure Gateway Settings in Cox Business MyAccount ................40 Defaulting to Factory Settings ..................... 44 User Provisioning ............................... 44 Restarting the Device ......................45 User Provisioning ...............................
  • Page 5 Parental Control Log ............................66 Status Pages ......................... 66 Log Pages ..........................66 Troubleshooting the DOCSIS 3.0 3848 Gateway ..............67 Frequently Asked Questions ....................67 How Do I Configure TCP/IP Protocol?....................... 67 How Do I Renew the IP Address on My PC? ..................... 69 Common Troubleshooting Issues ..................

  • Page 6: Overview Of The 3848 Wireless Gateway

    The software’s Graphical User Interface (GUI) gives you access to settings that were configured at the factory or by Cox Business for the most common installation configurations. After you access the GUI, you can customize these settings for your business needs.

  • Page 7: Front Panel Description

    OFF indicates that the wireless access point is not enabled WPS—OFF (normal condition): indicates that the wireless setup is not active. Blinking indicates the user has activated wireless setup to add new WPS clients on the wireless network Cox Business Internet Gateway 3848 User Guide...

  • Page 8: Back Panel

    Caution: The RESET button is for maintenance purposes only. I click it, you may lose any settings you have selected. We recomm that you contact Cox Technical Support for assistance. Cox Business Internet Gateway 3848 User Guide...

  • Page 9: Top Panel Description

    Overview of the 3848 Wireless Gateway WIFI ON/OFF—This button may be administratively disabled by Cox Business. When this button is enabled, momentarily pressing this switch once for 1 to 2 seconds will turn off the 2.4G transmitter when both Wi-Fi transmitters are on.

  • Page 10: Installing The Docsis 3.0 3848 Gateway

    Note: Professional installation may be available. Contact your local service provider for further assistance. Device image varies according to model. Figure 4. Devices Connected to the Wireless Gateway (sample) Cox Business Internet Gateway 3848 User Guide...

  • Page 11: Connect The Wireless Gateway

    At this point, the installation is complete, and you can use the Internet. (Note: If your PC does not have Internet access, refer to How Do I Configure TCP/IP Protocol?. Refer to the same section for Internet devices other than PCs. Cox Business Internet Gateway 3848 User Guide...

  • Page 12: Operation Of Front Panel Indicators

    Blinking or Blinking Blinking or Blinking or Blinking Fast Blinking Fast Blinking or Fast Fast Fast Blinking Blinking Blinking Off or Off or Off or Off or Off or Blinking Blinking Blinking Blinking Blinking Cox Business Internet Gateway 3848 User Guide...

  • Page 13: Normal Operations (Ac Power Applied)

    Note: In addition to the status shown in the previous table, some service providers use color-coded LEDs to indicate detailed channel bonding and data link status. For additional information about color- coded LEDs, contact Cox Technical Support. Cox Business Internet Gateway 3848 User Guide...

  • Page 14: Special Conditions

    Flashes in unison with the US indicator (twice per second) Flashes in unison with the DS indicator (twice per second) ONLINE WIFI 2.4G Slow Blinking (once per second) WIFI 5G Slow Blinking (once per second) Slow Blinking (once per second) Cox Business Internet Gateway 3848 User Guide...

  • Page 15: Web Access

    Click the DOCSIS WAN tab and enter the User Name and Password. See Figure 5. (Note: For a regular user, the default values are: <leave blank> (Username) and <leave blank> (Password). Figure 5. DOCSIS WAN screen Cox Business Internet Gateway 3848 User Guide...

  • Page 16: Lan Provisioning

    Click the Quick Setup tab to change your password and configure basic settings for the Technicolor Gateway device. To verify connectivity, check the Status link. The Wireless Network section in Figure 6 includes the minimum parameter settings to enable a SSID. Figure 6. Device Settings Cox Business Internet Gateway 3848 User Guide...
  • Page 17 Click the Connected Devices Summary button to view a detailed table on the devices that are connected behind the LAN interface. (Note: The modem may reboot when the LAN IP address or Subnet mask is changed.) Cox Business Internet Gateway 3848 User Guide...

  • Page 18: Ddns Feature

    Result: The DDNS client will notify the DDNS service whenever the WAN IP address changes so that your chosen host name will be resolved properly by inquiring hosts. The status of the service is shown at the bottom of the DDNS webpage. Cox Business Internet Gateway 3848 User Guide...

  • Page 19: Wlan Provisioning

    Gateway SSID, enter the current SSID shown on the Gateway Web GUI. If a wrong PIN number was input in the Gateway, the client device will not be connected. Cox Business Internet Gateway 3848 User Guide...

  • Page 20: User Provisioning For Basic Setup

    Setup PIN number into the client device. This method is commonly referred to as the External Registrar (ER) method. It also provides the Wireless Network (SSID) Name and Security Mode. In case of Dual-Band Concurrent Products, a separate section to view 5GHz parameters will be provided. Cox Business Internet Gateway 3848 User Guide...

  • Page 21: Radio Settings

    Lists the radio bands supported by the wireless card in your Gateway. 2.4GHz - This is the most common radio band used by WiFi devices. 5GHz - This selection will not be available if your Gateway does not support dual band operation Cox Business Internet Gateway 3848 User Guide...
  • Page 22 To broadcast the device's SSID, keep the default setting, Enable. If you do not want to broadcast the device's SSID, then select Disable. Remember to click Save Settings to apply your changes or Cancel Changes to cancel Cox Business Internet Gateway 3848 User Guide...

  • Page 23: Scan Button

    In case of Dual-Band Concurrent Products, you will see a separate section to control 5GHz, independent of 2.4GHz. WiFi Disabled View View of Radio Settings tab when both radios are disabled. Figure 12. Wireless Radio Settings Cox Business Internet Gateway 3848 User Guide...

  • Page 24: Guest Network

    Shows the MAC address of the secondary SSID. It is not configurable. Note that it is a locally administered MAC address based on the radio MAC address. SSID Broadcast Enables or disables SSID Broadcast. Cox Business Internet Gateway 3848 User Guide...
  • Page 25 Lease Time The amount of time that a device can stay connected to the wireless network. In Figure 13, the time is set at 86400 seconds, or 24 hours. Cox Business Internet Gateway 3848 User Guide...

  • Page 26: Terms Of Use

    Digital Millennium Copyright Act of 1998, an auto-enabled Terms of Use splash page permits Cox Business Internet Gateway customers to offer their guests a more secure WiFi experience. Customers who wish to use a business’s Guest WiFi must check the box indicating you have read and agree to the Guest WiFi Terms of Service and Acceptable Use Policy box and click the Submit button before they can access the Internet.

  • Page 27: Advanced Wireless Settings / Provisioning

    Wireless-N/G products are not able to transmit to the device in an environment with heavy 802.11b traffic. Select Disable if you want to permanently disable this feature. Cox Business Internet Gateway 3848 User Guide...
  • Page 28 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. Cox Business Internet Gateway 3848 User Guide...

  • Page 29: Wifi - Qos Settings

    This provides a more reliable transmission, but it increases traffic load, which decreases performance. If WMM is disabled then this setting has no effect, and you cannot disable ACKs from being returned from the stations. Cox Business Internet Gateway 3848 User Guide...

  • Page 30: Wireless Security Settings

    Wireless Security Mode 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. Cox Business Internet Gateway 3848 User Guide...

  • Page 31: Wireless Security Modes

    Wireless Security Modes The following wireless security mode options are supported: Disable, WEP, WPA-Personal, WPA2-Personal, WPA2-Mixed, WPA-Enterprise, and WPA2-Enterprise. Security Mode If WPS If WPS Enabled Disabled √ WPA-Personal √ WPA2-Personal √ √ Cox Business Internet Gateway 3848 User Guide...
  • Page 32 Choose a passphrase that is easy for you to remember and difficult for anyone else to guess. Enter a phrase of letters and/or numbers from 1 to 32 digits long. Click Generate to generate the WEP keys based on the passphrase. Cox Business Internet Gateway 3848 User Guide...
  • Page 33 Note: TKIP+AES is not allowed in WPA2-only mode. Passphrase (Pre-Shared Key) Enter a key of 8-63 characters. Key Renewal Enter a Key Renewal period, which instructs the device how often it should change encryption keys. The default is 3600 seconds. Cox Business Internet Gateway 3848 User Guide...
  • Page 34 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. Cox Business Internet Gateway 3848 User Guide...

  • Page 35: Wan Provisioning

    When the WAN Connection Mode is selected as DHCP, no more user settings will be available to configure WAN IP. The WAN side will receive an IP address as per the rules specified in the DHCP configuration of the MSO/ISP. Cox Business Internet Gateway 3848 User Guide...
  • Page 36 Router Mode via the Administration page. The device can also be reverted to Router mode by factory reset via rear panel switch. Working Mode – Bridged Only Caution: Bridge Mode may prevent multiple devices from accessing the internet. Cox Business Internet Gateway 3848 User Guide...

  • Page 37: Provisioning With Static Ip

    The Static IP for WAN interface is provided by the Service Provider. This is potentially used for public access to the WAN interface, like running a webserver internally on a LAN. Figure 22. Static IP Connection Mode Cox Business Internet Gateway 3848 User Guide...

  • Page 38: Mtu Size Feature

    However, under certain circumstances, you may want to limit the MTU size to smaller than the maximum that is allowed. Any non-zero entry for the MTU Size value will force outbound packets larger than that size to be fragmented. Figure 24. Gateway Access Cox Business Internet Gateway 3848 User Guide...
  • Page 39 Address field. Remote Management Port Enter the port number that will be open to outside access. The default setting is 8080. This port must be used when you establish a remote connection. Cox Business Internet Gateway 3848 User Guide...

  • Page 40: Bridge Mode Provisioning

    By default, configuring Bridge/Router mode can only be done through SNMP. Ability to configure secondary SSIDs in bridge mode is not available through the Web and must be done through SNMP. Figure 25. Administration Tab / Management Cox Business Internet Gateway 3848 User Guide...

  • Page 41: Mixed Mode Provisioning

    For example, a customer can have Port 1 and Port 2 in bridge mode while Port 3 and Port 4 are in router mode. Note: In case of a mixed mode setting, primary WiFi interface can only be in router mode. Cox Business Internet Gateway 3848 User Guide...

  • Page 42: Email Alert Provisioning

    E-Mail Address for Alert Logs Enter the e-mail address that should receive the logs. View Log To view the logs, click View Log. A new window will appear with the log data. Cox Business Internet Gateway 3848 User Guide...
  • Page 43 Click the Previous Page button to go back to the information previously displayed. Click the Next Page button to see the next section of the log, if available. Cox Business Internet Gateway 3848 User Guide...

  • Page 44: Administration, Diagnostic, Maintenance Tools

    (usually filename.gwc) unless you rename it before saving. When the file has been located, click Restore to restore the settings. Note that when the settings are restored, the device will reboot. Cox Business Internet Gateway 3848 User Guide...

  • Page 45: Configure Gateway Settings In Cox Business Myaccount

    Should you need to restore your router, this information will allow you to apply your latest configurations. Note: The information stored here will not alter the configurations or behavior of your gateway/router. Figure 27. MyAccount Cox Business Internet Gateway 3848 User Guide...
  • Page 46 Click the Gateway/Guest WiFi Reference Info box and click the Next button. (See Figure 28.) Choose the device you want to configure from the Select a Device drop-down menu. (See Figure 29.) Result: The Internet Gateway Settings window appears. (See Figure 30.) Cox Business Internet Gateway 3848 User Guide...
  • Page 47 Administration, Diagnostic, Maintenance Tools Figure 30. Internet Gateway Settings Populate the fields appropriately. (Tip: Click the question mark icon to see a description about the field. Click the Save button. Cox Business Internet Gateway 3848 User Guide...
  • Page 48 Use the following steps to upload a new configuration file to MyAccount or download/delete an existing stored configuration file to your computer. Repeat steps 1-6 in Configure Gateway Settings in Cox Business MyAccount. Scroll to the bottom of the window.

  • Page 49: Defaulting To Factory Settings

    This can be done from the Security Page, which can be accessed from the Administration Menu. To restore factory defaults, select the Restore Factory Defaults radio button and click Apply. This will cause the device to reset. The factory default password is <blank>. Cox Business Internet Gateway 3848 User Guide...

  • Page 50: Restarting The Device

    All the DOCSIS channel-related information is provided on the Channel Selection page. This page also allows selection of channel IDs or frequencies for modem ranging. The channel selection option allows a technician the ability to force the modem to the provisioned channel. Cox Business Internet Gateway 3848 User Guide...

  • Page 52: Security

    The Technicolor Gateway contains an embedded firewall application to protect the Private LAN from malicious attacks (DoS, etc.) from the WAN interface. Content filtering and SPAM filtering are also included to allow for manual parental control. Cox Business Internet Gateway 3848 User Guide...

  • Page 53: Firewall Basic Settings

    Enable this feature to block Denial of Service (DoS) attacks. A DoS attack does not attempt to steal data or damage your computers, but it overloads your Internet connection so you cannot use it. Cox Business Internet Gateway 3848 User Guide...
  • Page 54 Outbound traffic is allowed for the following services: HTTP and HTTPS (TCP ports 80, 443) • • DNS (TCP/UDP port 53) • NTP (UDP ports 119, 123) Email (TCP ports 25, 110, 143, 465, 587, 993, 995) • Cox Business Internet Gateway 3848 User Guide...
  • Page 55 Please note that unsolicited inbound traffic will not be forwarded to devices on your home network unless they match a port forwarding/triggering rule, or a DMZ host has been configured. In the Off operation level, no application or traffic is blocked. (Default setting) Cox Business Internet Gateway 3848 User Guide...

  • Page 56: Vpn Passthrough Settings

    These are enabled by default and allow the VPN users in the LAN to use the VPN client applications provided by the business/offices to connect to the corporate VPN servers. User Provisioning Figure 33. Security link / VPN Passthrough tab Cox Business Internet Gateway 3848 User Guide...

  • Page 57: Vpn Tunnel Settings

    Pre-shared key) for IPSEC. (Note: You can obtain these details from the network administrator (of the enterprise you are connecting to) before setting up the VPN tunnel.) User Provisioning Figure 34. Security link / VPN tab Cox Business Internet Gateway 3848 User Guide...
  • Page 58 Select the desired option, IP Addr., Any or FQDN. If the remote Gateway has a dynamic IP address, select Any or FQDN. If Any is selected, then the Gateway will accept requests from any IP address. Cox Business Internet Gateway 3848 User Guide...
  • Page 59 160-bit digest Perfect Forward Secrecy (PFS) If PFS is enabled, IKE Phase 2 negotiation will generate new key material for IP traffic encryption and authentication. Note that both sides must have PFS enabled. Cox Business Internet Gateway 3848 User Guide...
  • Page 60 160-bit digest Authentication Key This field specifies a key used to authenticate IP traffic. Both character and hexadecimal values are acceptable in this field. Note that both sides must use the same Authentication Key. Cox Business Internet Gateway 3848 User Guide...
  • Page 61 IKE. Click this button if the Gateway is unable to establish a VPN tunnel to the remote Gateway, and make sure the Advanced Settings match those on the remote Gateway. Cox Business Internet Gateway 3848 User Guide...

  • Page 62: Network Control And Advanced Security

    Save Settings. The Enable box allows you to store filter settings commonly used, but not have them active. Figure 35. Access Restrictions Tab / IP Address Filtering MAC Filtering MAC Filtering is not available. Cox Business Internet Gateway 3848 User Guide...

  • Page 63: Managed Devices

    Network Control and Advanced Security Managed Devices This is a powerful substitute for the MAC address filtering page. Figure 36. MAC Address filtering page Figure 37. Add Allowed Device screen Cox Business Internet Gateway 3848 User Guide...

  • Page 64: Port Filtering

    IP address to which traffic to those ports should be sent. If only a single port specification is desired, enter the same port number in the start and end locations for that IP address. A table of commonly used Port numbers is supplied on the page for convenience. Cox Business Internet Gateway 3848 User Guide...

  • Page 65: Port Forwarding Example

    Even though some port numbers may be open for special services mentioned above, the firewall will log and report any DoS abuse or attacks on these discovered ports dynamically. Cox Business Internet Gateway 3848 User Guide...
  • Page 66 Network Control and Advanced Security Commonly Used IP Port Numbers Application/Service Port Number Telnet SMTP (Outgoing Mail Server) Whois TFTP Gopher Finger HTTP rtelnet POP3 (Incoming Mail Server) NNTP (News Server) SNMP LDAP UUCP Cox Business Internet Gateway 3848 User Guide...

  • Page 67: Port Range Triggering

    Certain applications that use random undefined port numbers may have to be hosted in DMZ for the application to work correctly. This allows a guarantee that any application can work behind the firewall/NAT application in the Technicolor Gateway. Cox Business Internet Gateway 3848 User Guide...

  • Page 68: Dmz Hosting Feature

    DMZ computer is exposed to greater risk, the DMZ function should only be enabled when required.) DMZ Host IP Address: Enter the IP address of the computer you want to expose. (Note: The firewall remains active for specific Denial of Service attacks.) Cox Business Internet Gateway 3848 User Guide...

  • Page 69: Network/Parental Control

    By doing so, you allow access to the restricted content without having to enter a password every time a new webpage is served to the client. Click the Apply button to complete the changes to each rule. Cox Business Internet Gateway 3848 User Guide...

  • Page 70: Parental Control Functions

    Provides a password to override the restrictions set by this page. When restriction is triggered on the computer screen there will be a message with option for entering password. Correct password will grant access for specific amount of time. Cox Business Internet Gateway 3848 User Guide...

  • Page 71: Parental Control Log

    • Log Pages All log pages display the following items: Description of the event • Number of events that have occurred • • Last occurrence of an event • Target and source addresses Cox Business Internet Gateway 3848 User Guide...

  • Page 72: Troubleshooting The Docsis 3.0 3848 Gateway

    OK. To specify an IP address, click Use the following IPv6 address, and then, in the • IPv6 address, Subnet prefix length, and the Default Gateway fields, type the IP address settings. Cox Business Internet Gateway 3848 User Guide...
  • Page 73 DNS servers. To change advanced DNS, WINS, and IP settings, click Advanced. When you are finished, click OK. Try to access the Internet. If you cannot access the Internet, contact Cox Business Support. Configuring TCP/IP on Macintosh Systems Click the Apple icon in the upper-left corner of the Finder.

  • Page 74: How Do I Renew The Ip Address On My Pc

    Type cmd in the Search field. The cmd window appears. Type ipconfig /renew and press Enter to renew the IP address of the computer. (Note: If you cannot access the Internet, contact Cox Business Support.) Renewing the IP Address on Macintosh Systems Close all open programs.

  • Page 75: Common Troubleshooting Issues

    The Gateway works with a standard, 75-ohm, RF coaxial cable. If you are using a different cable, your Gateway will not function properly. Contact Cox Technical Support to determine whether you are using the correct cable. Cox Business Internet Gateway 3848 User Guide...

  • Page 76: Tips For Improved Performance

    If you are connected to your PC with an Ethernet connection, your PC should be • equipped with a Gigabit Ethernet card for best performance. Cox Business Internet Gateway 3848 User Guide...

  • Page 77: Support

    Firewall logs MTU changes USB Storage and Wireless radio power and Sharing Settings transmission rates Contact Us If you have technical questions, contact Cox Business Technical Support at 1-877-935-7038 for assistance. End of Document Cox Business Internet Gateway 3848 User Guide...

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