User manual COMTREND CT-5071E

[. . . ] CT-5071E ADSL2+ Ethernet Router User's Manual Version A4. 0, May 07, 2007 261063-011 Preface This manual provides information to network administrators. It covers the installation, operation and applications of the ADSL router. The reader reading this manual is presumed to have a basic understanding of telecommunications. For product update, new product release, manual revision, software upgrade, technical support, etc. , visit Comtrend Corporation at http://www. comtrend. com This document is subject to change without notice. Warning Before servicing or disassembling this equipment, always disconnect all power and telephone lines from the device. Use an appropriate power supply and a UL Listed telephone line cord. [. . . ] Changing the default gateway or the DNS effects the whole system. Configuring them with static values will disable the automatic assignment from DHCP or other WAN connection. If you configure static default gateway over this PVC in MER mode, you must enter the IP address of the remote gateway in the "Use IP address". The "Use WAN interface" is optional. The ISP should provide the values that must be entered in the entry fields. 32 4. Click Next to display the following screen appears. Enable NAT checkbox: If the LAN is configured with a private IP address, the user should select this checkbox. The NAT submenu on the left side main panel will be displayed after reboot. The user can then configure NAT-related features after the system comes up. If a private IP address is not used on the LAN side, this checkbox should be de-selected to free up system resources for better performance. When the system comes back after reboot, the NAT submenu will not be displayed on the left main panel. Enable Firewall checkbox: If the firewall checkbox is selected, the firewall submenu on the left side main panel will be displayed after system reboot. The user can then configure firewall features after the system comes up. If firewall is not used, this checkbox should be de-selected to free up system resources for better performance. When system comes back after reboot, the Firewall submenu will not be displayed on the left main panel. Enable IGMP Multicast: Tick the checkbox to enable IGMP multicast (proxy). IGMP (Internet Group Membership Protocol) is a protocol used by IP hosts to report their multicast group memberships to any immediately neighboring multicast routers. Enable WAN Service: Tick the checkbox to enable the WAN (ADSL) service. If this item is not selected, you will not be able to use the ADSL service. Service Name: This is User-defined. 33 5. The following screen appears. The Device Setup page allows the user to configure the LAN interface IP address and DHCP server. If the user would like this ADSL router to assign dynamic IP addresses, DNS server and default gateway to other LAN devices, select the radio box Enable DHCP server on the LAN to enter the starting IP address and end IP address and DHCP lease time. This configures the router to automatically assign IP addresses, default gateway address and DNS server addresses to each of your PCs. Select Enable DHCP Server Relay (if required), and enter the DHCP Server IP Address. [. . . ] The following log levels are Emergency = system is unusable Alert = action must be taken immediately Critical = critical conditions Error = Error conditions Warning = normal but significant condition Debugging = debug-level messages Emergency is the most serious event level, whereas Debugging is the least important. For instance, if the log level is set to Debugging, all the events from the lowest Debugging level to the most critical level Emergency level will be recorded. If the log level is set to Error, only Error and the level above will be logged. Allows the user to select the logged events and displays on the View System Log page for events of this level and above to the highest Emergency level. [. . . ]