组网说明:
本案例采用H3C HCL模拟器的F1060防火墙来模拟NAPT典型组网配置案例,内网和外网均已在网络拓扑图中有了明确的标识,FW1作为内网的出口设备,不仅要保障内网的安全,同时也需要提供内网访问外网的地址转换服务。由于内网仅没有申请到固定的公网地址,且公网地址有ISP统一自动分配,因此需要采用EASY IP的方式将内网地址转换为FW1外网口地址来访问外网。
1、按照网络拓扑图正确配置IP地址
2、FW1配置NAT地址转换,并配置默认路由指向外网
3、ISP配置DHCP,为FW1自动分配IP地址
特别说明:
以下仅给出全部配置过程及EASY IP NAT关键配置点,详细的测试方法、过程及测试结果请见附件!
ISP:
<H3C>sys
System View: return to User View with Ctrl+Z.
[H3C]sysname ISP
[ISP]int gi 0/1
[ISP-GigabitEthernet0/1]ip address 202.103.224.254 24
[ISP-GigabitEthernet0/1]quit
[ISP]int gi 0/0
[ISP-GigabitEthernet0/0]des <connect to FW1>
[ISP-GigabitEthernet0/0]ip address 202.1.100.1 28
[ISP-GigabitEthernet0/0]quit
[ISP]dhcp enable
[ISP]dhcp server ip-pool 1
[ISP-dhcp-pool-1]network 202.1.100.0 mask 255.255.255.240
[ISP-dhcp-pool-1]gate
[ISP-dhcp-pool-1]gateway-list 202.1.100.1
[ISP-dhcp-pool-1]quit
FW1:
<H3C>sys
System View: return to User View with Ctrl+Z.
[H3C]sysname FW1
[FW1]acl basic 2001
[FW1-acl-ipv4-basic-2001]rule 0 permit source any
[FW1-acl-ipv4-basic-2001]quit
[FW1]
[FW1]zone-pair security source trust destination untrust
[FW1-zone-pair-security-Trust-Untrust]packet-filter 2001
[FW1-zone-pair-security-Trust-Untrust]quit
[FW1]
[FW1]zone-pair security source untrust destination trust
[FW1-zone-pair-security-Untrust-Trust]packet-filter 2001
[FW1-zone-pair-security-Untrust-Trust]quit
[FW1]
[FW1]zone-pair security source trust destination local
[FW1-zone-pair-security-Trust-Local]packet-filter 2001
[FW1-zone-pair-security-Trust-Local]quit
[FW1]
[FW1]zone-pair security source local destination trust
[FW1-zone-pair-security-Local-Trust]packet-filter 2001
[FW1-zone-pair-security-Local-Trust]quit
[FW1]
[FW1]zone-pair security source untrust destination local
[FW1-zone-pair-security-Untrust-Local]packet-filter 2001
[FW1-zone-pair-security-Untrust-Local]quit
[FW1]
[FW1]zone-pair security source local destination untrust
[FW1-zone-pair-security-Local-Untrust]packet-filter 2001
[FW1-zone-pair-security-Local-Untrust]quit
[FW1]int gi 1/0/2
[FW1-GigabitEthernet1/0/2]ip address 192.168.1.1 24
[FW1-GigabitEthernet1/0/2]quit
[FW1]int gi 1/0/3
[FW1-GigabitEthernet1/0/3]ip address 192.168.2.1 24
[FW1-GigabitEthernet1/0/3]quit
[FW1]int gi 1/0/4
[FW1-GigabitEthernet1/0/4]des <connect to ISP>
[FW1-GigabitEthernet1/0/4]ip address dhcp-alloc //配置接口自动获取IP地址
[FW1-GigabitEthernet1/0/4]quit
[FW1]ip route-static 0.0.0.0 0.0.0.0 202.1.100.1
[FW1]security-zone name Trust
[FW1-security-zone-Trust]import interface GigabitEthernet 1/0/2
[FW1-security-zone-Trust]import interface GigabitEthernet 1/0/3
[FW1-security-zone-Trust]quit
[FW1]security-zone name Untrust
[FW1-security-zone-Untrust]import interface GigabitEthernet 1/0/4
[FW1-security-zone-Untrust]quit
FW1 EASY IP NAT关键配置点:
[FW1]acl basic 2000
[FW1-acl-ipv4-basic-2000]rule 0 permit source any
[FW1-acl-ipv4-basic-2000]quit
[FW1]int gi 1/0/4
[FW1-GigabitEthernet1/0/4]nat outbound 2000
[FW1-GigabitEthernet1/0/4]quit
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经过尝试,可以获取到202.1.100.2的这个ip地址