NetComm NB712 manual Click on Time Sync

Page 64

9.3 Time Sync

Time synchronization is an essential element for any business that relies on an IT system. The reason for this is that these systems all have clocks that are the source of time for ﬁles or operations they handle. Without time synchronization, time on these systems can vary and cause ﬁrewall packet ﬁltering schedule processes to fail, security to be compromised, and virtual servers to work in wrong schedule.

Click on TIME SYNC.

There are two synchronization modes: Simple Network Time Protocol (SNTP) and synchronization with PC. For synchronization with PC, select Sync with PC. The gateway will synchronize the time with the connecting PC.

SNTP is the acronym for Simple Network Time Protocol, which is an adaptation of the Network Time Protocol (NTP) used to synchronize computer clocks in the Internet. SNTP can be used to ensure the ultimate performance of full NTP implementation.

64	NB712 / NB714 User Guide
	YML829 Rev1

Image 64

Contents Page Contents NB714 User Guide Package Contents FeaturesIntroduction Speciﬁcation RoutingBridging SecurityIndicators ATM QoSAAL5 Encapsulation WAN InterfaceApplication Physical/ElectricalMemory Product InformationFirewall Packet Filtering Types of FirewallThere are three types of ﬁrewall Circuit Gateway Denial of Service AttackApplication Gateway Ping of death SYN FloodIcmp Flood UDP FloodVlan Virtual Local Area Network Frame SpeciﬁcationApplications VID uniquely identiﬁes the Vlan to which the frame belongsFront Panel Getting to know the routerLED status Rear Panel LAN 1,2,3,4Connecting your G.SHDSL Modem Router Check the Terminal Access ProgramDetermine Connection Setting Check the Ethernet Adapter in PCBridge EoA Route EoA IPoA PPPoA Install the Shdsl Router PPPoECross-over Ethernet cables can be used Port router with network topologyConﬁguration via Web Browser Router, which will lose any previous conﬁguration System error or disconnection Basic SetupClick Basic for basic installation LAN Parameters Bridge ModeEnter Host Name WAN1 Parameters Enter VPI Enter VCI Click LLC Click NextRouting Mode Dhcp Client Click Next to setup WAN1 parametersLAN IP Type Dhcp Server IP typeIP Address Subnet MaskTrigger Dhcp Service DNS ServerDhcp relay RelayPPPoE or PPPoA AAL5 EncapProtocol For more information, refer to the section on NAT/DMZPassword Password ConﬁrmUsername Idle TimeEprom IPoA or EoA GatewayEprom Advanced Setup Annex Type Link TypeData rate Data RateShdsl SNR margin Margin range is from 0 toMargin, the better the line connection Reconnect for better line connectionWAN QoS Quality of Service UBR Unspeciﬁed Bit RateCBR Constant Bit Rate PCR Peak Cell Rate in kbpsBridge Eprom Vlan Pvid PacketsRIP Mode RouteAuto RIP Summary Press ModifyRIP Version Authentication requiredPoison Reverse NAT/DMZ Multi-DMZ Multi-NATVirtual Start IP Address Count Global Start IP AddressVirtual Server Firewall Basic Firewall SecurityAutomatic Firewall Security Advanced Firewall Security Click Advanced Firewall Security and then press FinishSYN Attack Connections and will be unresponsiveAddresses originating from your network Ping of death attack attempts to crash your system byDirection DescriptionSrc. IP Address Dest. IP AddressFiltering Rule for Smtp connection Filtering rule will be conﬁgured as followUpdate Filtering Rule Filtering ResultRule Order When the rule is ordered as ABC10.0.0.0 172.16.6.0 Permit 10.1.99.0 172.16.0.0 Deny Any IP QoS NB714 User Guide Administration Security NB712 / NB714 User Guide Snmp MIBSnmp status CommunityVersion Community Time Sync Click on Time SyncTime Server Sntp serviceTime Zone Utility System Info Restore Conﬁguration Backup Conﬁguration10.2 Conﬁg Tool Lose all the conﬁgured parametersUpgrade Logout To logout the router, press logoutRestart Status You can monitor the followingCO side LAN-to-LAN connection with bridge ModeLAN Parameters WAN1 Parameters Enter IP 192.168.1.1 Enter Subnet MaskEnter Gateway 192.168.1.1 Enter Host Name Enter VPI Enter VCI EncapHost Name Enter Soho CPE SideVCI32 EncapLLC LAN to LAN Connection with Routing Mode Dhcp ServiceClick Route and CO Side then press Next IP Address 192.168.20.1 Subnet Mask 255.255.255.0 Host NameClick Next to setup the IP parameters WAN ParametersClick Route and CPE Side then press Next IP Address 192.168.10.1 Subnet Mask 255.255.255.0 Host Name192.168.30.2 Useradmin Password Serial ConsoleTelnet Baudrate 9600 Data Bits Parity Check Stop Bits Flow-controlOperation Interface Window structure To choose another parameters Menu Driven Interface CommandsCtrl + C To quit the conﬁguring item Ctrl + Q For help Menu Tree 14.7 Conﬁguration Ping Packet internet groper command Admin Done via utility commandUtility Exit Quit systemStatus Show SystemConﬁg ScriptReboot AdministrationWrite PingUser Proﬁle Snmp Edit Community Entry List ShowSupervisor Password and ID Move the cursor to service and press enter SntpMove the cursor to sntp and press enter Move the cursor to timeserver1 and press enterMove the cursor to list and review the setting Setup UtilityExit ModeShdsl 14.16.3 WAN Bridge After enter add menu, the screen will prompt as followVlan Move the cursor to vlan and press enterFollow the following steps to conﬁgure 802.11q Vlan 14.16.6 802.11Q VlanFor each VLAN, Vlan ID is a unique number among 1~4095 Generic command can setup RIP mode and auto summery mode You can review the list of RIP parameters via list commandRoute Screen will display the following14.16.8 LAN IP share14.16.10 NAT You can conﬁgure NAT parameters in nat menuMapping 14.16.11 PAT After key in enter, the screen will prompt as belowYou can enable the demilitarized zone via active command ﬁrewall security level can conﬁgure via level command14.16.12 DMZ FirewallActive DoS Protection IPQoS You can view the Dhcp conﬁguration via list command DhcpDNS proxy DefaultHost name Appendix a Cable Information RJ-45 Network Ports10Mbps 100MbpsStraight-Through Cabling Straight and crossover cable conﬁgurationCross-Over Cabling Shdsl Line Connector Console Cable No connectionRxD O TxDAppendix B Registration and Warranty Information Contact InformationProduct Warranty