CIS403_StaticAndDynamic_NAT_Lab

CIS403_StaticAndDynamic_NAT_Lab - 1 - 3 CCNP 1: Advanced...

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1 - 3 CCNP 1: Advanced Routing v 3.0 - Lab 2.10.5.1 Copyright 2003, Cisco Systems, Inc. Lab 2.10.5.1 Network Address Translation – Static NAT and Dynamic NAT Objective In this lab, static Network Address Translation (NAT) and dynamic NAT are configured. Scenario The International Travel Agency needs approximately 100 private IP addresses translated in a oneto- one fashion with a pool of public IP addresses. To do this, ITA will use NAT translation with a portion of its class C address space allocated by ISP1. Step 1 Build and configure the network according to the diagram. If the configurations from the previous lab are being used, remove all access lists and priority lists, change the hostname on Singapore to NAT, and change the subnet mask on the serial link to 255.255.255.252. Use ping to test connectivity between the NAT and ISP1 routers, between the workstations and the default gateway, and between WebServer and ISP1. Step 2 Since no routing protocol will be enabled, configure a default route to the Internet on the NAT router: NAT(config)# ip route 0.0.0.0 0.0.0.0 200.200.100.2 2 - 3 CCNP 1: Advanced Routing v 3.0 - Lab 2.10.5.1 Copyright 2003, Cisco Systems, Inc. ISP1 needs to be able to reach hosts on the 192.168.0/24 network. But these hosts will have their IP addresses translated to public IP addresses in the 200.200.100.128/25 network, so a static route to the 200.200.100.128/25 network is required: ISP1(config)# ip route 200.200.100.128 255.255.255.128 200.200.100.1 Step 3 Create a standard Access Control List that defines all Internal Users:. NAT(config)# access-list 1 permit 192.168.1.0 0.0.0.255 Step 4 In this step, configure private and public address spaces to be used for NAT and configure the
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translation: The public address space 200.200.100.128/25 will be used as a pool to provide NAT translation for the private IP addresses. To statically map the Internal User with IP address 192.168.1.2 pictured in the diagram, enter the following command NAT(config)# ip nat inside source static 192.168.1.2 200.200.100.252 This static mapping has the advantage of allowing ‘external’ users to always access the host 192.168.1.2 via the fixed IP address 200.200.100.252 (in addition to letting the 192.168.1.2 Internal
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This note was uploaded on 09/09/2011 for the course CIS CIS403 taught by Professor Mr.t during the Spring '11 term at ECPI College of Technology.

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CIS403_StaticAndDynamic_NAT_Lab - 1 - 3 CCNP 1: Advanced...

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