Siemens 5890 manual Nat

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SIEMENS 5890 DSL Router

Chapter 6 Security Setup

User’s Guide

NAT

 

 

NAT

Network Address Translation (NAT) provides a level of security by hiding the private IP addresses of your LAN behind the single public IP address of your router. All connections pass through the router and are translated by NAT. Network addresses on inbound traffic are translated from public to private IP addresses; while addresses on outbound traffic are translated from private IP addresses to the router’s public IP address. Besides translating addresses, NAT also authenticates a request or matches it to a previous request.

Network administrators create a NAT table that does the global-to-local and local-to-global IP address mapping. To confiugre NAT:

1.Click NAT on the left navigation pane of the Router Information page. This displays the NAT Configuration page.

2.In the NAT Passthrough section of this page, select Enable or Disable to specify whether or not multiple VPN clients are allowed. Enabled, multiple VPN clients are allowed; disabled, only a single VPN client is allowed.

3.In the Outbound NAT Setting section of this page, select Enable or Disable to enable or disable NAT for communications from your LAN to the Wide Area Network (WAN).

4.Click Apply.

5.Do both of the following:

Configure the WAN side for NAT support by clicking NAT Server from the left navigation pane.

Configure the Local Machine for NAT support by clicking NAT Host Mapping from the left navigation pane.

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Contents 5890 Software License and Limited Warranty Software LicenseGeneral Provisions Table of Contents Security Setup User SetupAdvanced Setup Monitoring Router Front Panel Back PanelHardware Specifications Software Specifications Security Frame RelayPPP RFC 1661, RFC PC Requirements Installation RequirementsPackage Contents Network Service Provider Requirements Hardware Installation PC Configuration Windows 98/MEWindows NT Select TCP/IP Protocol from the Network Protocols listWindows Windows XP Mac OS Mac OSX Linux Configuring the Router Establish ConnectionRouter Information To do this Refer toAccess Easy Setup Wizard Select ProtocolPoint-to-Point Protocol over ATM VC Multiplexing Bridging EnabledIP Routing Enabled NAT Enabled Block Net Bios TrafficPoint-to-Point Protocol over ATM LLC Encapsulation NAT Enabled RFC 1483 Multiprotocol Encapsulation LLC/SNAP RFC 1483 VC Multiplexing Routed Point-to-Point Protocol over Ethernet over RFC1483 RFC 1483 MAC Encapsulated Routing MER RAW IP Dynamic Host Configuration Protocol Local Area Network Configuration User Setup User ManagementAdding/Modifying a User Account Deleting a User Account User Lookup LocalRadius NoneUntrusted Secure Mode ConfigurationTrusted Configure the Radius Server Configure the TacPlus Server Management Classes Class Functional AreasChange Password Access Control No access restrictionsClick Save and Reboot Telnet WebAdvanced Setup WAN Selection Sdsl ATM or Sdsl Frame RelayRemote File Configuration DMZ DMZ Router Clock Dhcp Dhcp QoS Differentiated Services FrameworkWeighted Fair Queuing Configure QoS policies Configure QoS Policy Siemens Before policy Reorder QoS PoliciesTo the end Routing Table Configuration Dial Backup Click Enable Dial BackupATM Traffic Shaping Constant Bit Rate Real-Time Variable Bit RateNon Real-Time Variable Bit Rate Unspecified Bit RateSwitch Management Switch Mirror Configuration Switch Age Time Command Line Interface File Editor Security Setup NAT NAT Server Configuration NAT Host Mapping Port Number DisableDefault Snmp IP Filter Click Add IP RangeSnmp Password Enter the New Password and New Password againSecure Shell Key GeneratorConfigure SSH Load Keys Key Generator Firewall Scripts Stateful Firewall Firewall RulesConfigure Stateful Firewall View Dropped Packets Configure Firewall Rules Protocol/Port ApplicationDelete Firewall Rules IKE/IPSec Configuration Easy IKE/IPSec Setup Advanced IKE/IPSec Setup IKE PeersIKE Peers Definition IKE Proposals Definition IKE IPSec Proposals Definition Siemens IKE IPSec Policies Definition Siemens VPN Log On Monitoring Router System SummaryEthernet Interface Information Remote Connection InformationIP Routing Information System InformationDiagnostics PPPoE SessionInterface Information ATM StatisticsRouting Table Information Files InformationList All Configuration Data Memory UsageTCP/IP Statistics