LAB - NAT Overload vs NAT Staic

Cho sơ đồ mạng như sau:

Yêu cầu:

Cấu hình IP như trong sơ đồ
Tạo 2 VLAN 10 & 20, định tuyến cho các VLAN dùng Switch L3
Định tuyến tĩnh cho toàn bộ sơ đồ
Cấu hình NAT Overload & NAT Static để các máy bên trong truy cập Internet & các máy bên ngoài truy cập được Web Server dtu.vn

Thông tin cấu hình trên các thiết bị:

DHCP Server

Web Server dtu.vn

DNS-Web Server tuoitre.vn

SWCore

SWCore#show running-config

Building configuration...

Current configuration : 2452 bytes

version 12.2

no service timestamps log datetime msec

no service timestamps debug datetime msec

no service password-encryption

hostname SWCore

ip routing

spanning-tree mode pvst

interface FastEthernet0/1

switchport access vlan 10

switchport mode access

interface FastEthernet0/2

switchport access vlan 10

switchport mode access

interface FastEthernet0/3

switchport access vlan 10

switchport mode access

interface FastEthernet0/4

switchport access vlan 10

switchport mode access

interface FastEthernet0/5

switchport access vlan 10

switchport mode access

interface FastEthernet0/6

switchport access vlan 10

switchport mode access

interface FastEthernet0/7

switchport access vlan 10

switchport mode access

interface FastEthernet0/8

switchport access vlan 10

switchport mode access

interface FastEthernet0/9

switchport access vlan 10

switchport mode access

interface FastEthernet0/10

switchport access vlan 10

switchport mode access

interface FastEthernet0/11

switchport access vlan 20

switchport mode access

interface FastEthernet0/12

switchport access vlan 20

switchport mode access

interface FastEthernet0/13

switchport access vlan 20

switchport mode access

interface FastEthernet0/14

switchport access vlan 20

switchport mode access

interface FastEthernet0/15

switchport access vlan 20

switchport mode access

interface FastEthernet0/16

switchport access vlan 20

switchport mode access

interface FastEthernet0/17

switchport access vlan 20

switchport mode access

interface FastEthernet0/18

switchport access vlan 20

switchport mode access

interface FastEthernet0/19

switchport access vlan 20

switchport mode access

interface FastEthernet0/20

switchport access vlan 20

switchport mode access

interface FastEthernet0/21

interface FastEthernet0/22

interface FastEthernet0/23

switchport trunk encapsulation dot1q

switchport mode trunk

interface FastEthernet0/24

interface GigabitEthernet0/1

interface GigabitEthernet0/2

interface Vlan1

ip address 192.168.1.2 255.255.255.0

interface Vlan10

ip address 192.168.10.1 255.255.255.0

ip helper-address 192.168.1.100

interface Vlan20

ip address 192.168.20.1 255.255.255.0

ip helper-address 192.168.1.100

ip classless

ip route 0.0.0.0 0.0.0.0 192.168.1.1

ip flow-export version 9

line con 0

line aux 0

line vty 0 4

end

SWCore#

FW

FW#show running-config

Building configuration...

Current configuration : 805 bytes

version 12.4

no service timestamps log datetime msec

no service timestamps debug datetime msec

no service password-encryption

hostname FW

no ip cef

no ipv6 cef

spanning-tree mode pvst

interface FastEthernet0/0

ip address 192.168.100.1 255.255.255.0

duplex auto

speed auto

interface FastEthernet0/1

ip address 192.168.0.2 255.255.255.0

duplex auto

speed auto

interface FastEthernet1/0

ip address 192.168.1.1 255.255.255.0

duplex auto

speed auto

interface Vlan1

no ip address

shutdown

ip classless

ip route 0.0.0.0 0.0.0.0 192.168.0.1

ip route 192.168.10.0 255.255.255.0 192.168.1.2

ip route 192.168.20.0 255.255.255.0 192.168.1.2

ip flow-export version 9

line con 0

line aux 0

line vty 0 4

end

FW#

GW

GW#show running-config

Building configuration...

Current configuration : 1208 bytes

version 12.4

no service timestamps log datetime msec

no service timestamps debug datetime msec

no service password-encryption

hostname GW

ip cef

no ipv6 cef

spanning-tree mode pvst

interface FastEthernet0/0

ip address 200.1.1.1 255.255.255.0

ip nat outside

duplex auto

speed auto

interface FastEthernet0/1

ip address 192.168.0.1 255.255.255.0

ip nat inside

duplex auto

speed auto

interface Vlan1

no ip address

shutdown

ip nat inside source list 1 interface FastEthernet0/0 overload

ip nat inside source static tcp 192.168.100.2 80 200.1.1.1 80

ip nat inside source static tcp 192.168.100.2 443 200.1.1.1 443

ip classless

ip route 192.168.100.0 255.255.255.0 192.168.0.2

ip route 192.168.10.0 255.255.255.0 192.168.0.2

ip route 192.168.20.0 255.255.255.0 192.168.0.2

ip route 192.168.1.0 255.255.255.0 192.168.0.2

ip flow-export version 9

access-list 1 permit 192.168.0.0 0.0.0.255

access-list 1 permit 192.168.1.0 0.0.0.255

access-list 1 permit 192.168.10.0 0.0.0.255

access-list 1 permit 192.168.20.0 0.0.0.255

access-list 1 permit 192.168.100.0 0.0.0.255

line con 0

line aux 0

line vty 0 4

end

GW#

Kiểm thử

Đứng tại máy PCVLAN10:

Đứng tại máy Client ngoài Internet:

Đứng tại Router GW:

GW#show ip nat translations

Pro Inside global Inside local Outside local Outside global

udp 200.1.1.1:1025 192.168.10.101:1025200.1.1.2:53 200.1.1.2:53

udp 200.1.1.1:1026 192.168.10.101:1026200.1.1.2:53 200.1.1.2:53

udp 200.1.1.1:1027 192.168.10.101:1027200.1.1.2:53 200.1.1.2:53

udp 200.1.1.1:1028 192.168.10.101:1028200.1.1.2:53 200.1.1.2:53

tcp 200.1.1.1:1025 192.168.10.101:1025200.1.1.2:80 200.1.1.2:80

tcp 200.1.1.1:1026 192.168.10.101:1026200.1.1.2:80 200.1.1.2:80

tcp 200.1.1.1:1027 192.168.10.101:1027200.1.1.2:80 200.1.1.2:80

tcp 200.1.1.1:1028 192.168.10.101:1028200.1.1.2:80 200.1.1.2:80

tcp 200.1.1.1:443 192.168.100.2:443 --- ---

tcp 200.1.1.1:80 192.168.100.2:80 --- ---

tcp 200.1.1.1:80 192.168.100.2:80 200.1.1.3:1025 200.1.1.3:1025

GW#

GW#show ip route

Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP

i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area

* - candidate default, U - per-user static route, o - ODR

P - periodic downloaded static route

Gateway of last resort is not set

C 192.168.0.0/24 is directly connected, FastEthernet0/1

S 192.168.1.0/24 [1/0] via 192.168.0.2

S 192.168.10.0/24 [1/0] via 192.168.0.2

S 192.168.20.0/24 [1/0] via 192.168.0.2

S 192.168.100.0/24 [1/0] via 192.168.0.2

C 200.1.1.0/24 is directly connected, FastEthernet0/0

GW#

By: dangocuong@gmail.com

Tin khác:

Trường Khoa Học Máy Tính & Trí Tuệ Nhân Tạo

Khoa Công Nghệ Thông Tin

LAB - NAT Overload vs NAT Staic

Cho sơ đồ mạng như sau:

Yêu cầu:

Thông tin cấu hình trên các thiết bị:

DHCP Server

Web Server dtu.vn

DNS-Web Server tuoitre.vn

SWCore

FW

GW

Kiểm thử