CISCOVPN及其配置示例.doc

此文檔收集于網(wǎng)絡(luò)，如有侵權(quán)，請聯(lián)系網(wǎng)站刪除VPN及其配置示例VPN的定義 虛擬專網(wǎng)（VPN-VIRTUAL PRIVATE NETWORK）指的是在公用網(wǎng)絡(luò)上建立專用網(wǎng)絡(luò)的技術(shù)。之所以稱為虛擬網(wǎng)主要是因為整個VPN網(wǎng)絡(luò)的任意兩個節(jié)點之間的連接并沒有傳統(tǒng)專網(wǎng)所需的端到端的物理鏈路，而是架構(gòu)在公用網(wǎng)絡(luò)服務(wù)商所提供的網(wǎng)絡(luò)平臺（如INTERNET，ATM，F(xiàn)RAME RELAY等）之上的邏輯網(wǎng)絡(luò)，用戶數(shù)據(jù)在邏輯鏈路中傳輸。 VPN的功能 1、通過隧道（TUNNEL）或虛電路（VIRTUAL CIRCUIT）實現(xiàn)網(wǎng)絡(luò)互聯(lián) 2、支持用戶安全管理 3、能夠進行網(wǎng)絡(luò)監(jiān)控、故障診斷 VPN解決方案的優(yōu)點 1、省錢：它可以節(jié)省長途電話費和長途專線電話費和長途專線網(wǎng)絡(luò)費可以為用戶節(jié)省30-25%的 網(wǎng)絡(luò)應(yīng)用的開銷。 2、選擇靈活、速度快：通過vpn網(wǎng)關(guān)，用戶可以選擇多種internet連通技術(shù)，而且對于 INTERNET的容量可以實現(xiàn)按需定制； 3、安全性好：VPN的認證機制將更好地保證用戶的隱私權(quán)和收發(fā)數(shù)據(jù)的完整性； 4、實現(xiàn)投資的保護：VPN技術(shù)的應(yīng)用可以建立在用戶現(xiàn)有的防火墻的基礎(chǔ)上，用戶正在使用的 應(yīng)用軟件也不受影響。 VPN技術(shù)原理 1、 VPN系統(tǒng)使分布在不同地方的專用網(wǎng)絡(luò)在不可信任的公共網(wǎng)絡(luò)上安全的通信。 2、 VPN設(shè)備根據(jù)網(wǎng)管設(shè)置的規(guī)則，確定是否需要對數(shù)據(jù)進行加密或讓數(shù)據(jù)直接通過。 3、 對需要加密的數(shù)據(jù)，VPN設(shè)備對整個數(shù)據(jù)包進行加密和附上數(shù)字簽名。 4、 VPN設(shè)備加上新的收據(jù)包頭，其中包括目的地VPN設(shè)備需要的安全信息和一些初始化參數(shù)。 5、 VPN設(shè)備對加密后的數(shù)據(jù)、鑒別包以及源IP地址、目標(biāo)VPN設(shè)備IP地址進行重新封裝，重新封裝后的數(shù)據(jù)包通過虛擬通道在公網(wǎng)上傳輸。 6、 當(dāng)數(shù)據(jù)包到達目標(biāo)VPN設(shè)備時，數(shù)據(jù)包被解封裝，數(shù)據(jù)包被解封裝，數(shù)字簽名，數(shù)字簽名被 核對無誤后，收據(jù)包被解密。 VPN配置實例 Intranet 內(nèi)聯(lián)網(wǎng)配置: Figure 3-8: Intranet VPN Scenario Physical Elements Headquarters Router 配置 hq-sanjose# show running-config Building configuration. Current configuration: ! version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname hq-sanjose ! boot system flash bootflash: boot bootldr bootflash:c7100-boot-mz.120-1.1.T boot config slot0:hq-sanjose-cfg-small no logging buffered ! crypto isakmp policy 1 authentication pre-share lifetime 84600 crypto isakmp key test12345 address 172.24.2.5 ! crypto ipsec transform-set proposal1 ah-sha-hmac esp-des esp-sha-hmac mode transport ! ! crypto map s1first local-address Serial1/0 crypto map s1first 1 ipsec-isakmp set peer 172.24.2.5 set transform-set proposal1 match address 101 ! interface Tunnel0 bandwidth 180 ip address 172.17.3.3 255.255.255.0 no ip directed-broadcast tunnel source 172.17.2.4 tunnel destination 172.24.2.5 crypto map s1first ! interface FastEthernet0/0 ip address 10.1.3.3 255.255.255.0 no ip directed-broadcast no keepalive full-duplex no cdp enable ! interface FastEthernet0/1 ip address 10.1.6.4 255.255.255.0 no ip directed-broadcast no keepalive full-duplex no cdp enable ! interface Serial1/0 ip address 172.17.2.4 255.255.255.0 no ip directed-broadcast no ip mroute-cache no keepalive fair-queue 64 256 0 framing c-bit cablelength 10 dsu bandwidth 44210 clock source internal no cdp enable crypto map s1first ! ip route 10.1.4.0 255.255.255.0 Tunnel0 ! access-list 101 permit gre host 172.17.2.4 host 172.24.2.5 ! line con 0 transport input none line aux 0 line vty 0 4 login ! end Remote Office Router 配置: ro-rtp# show running-config Building configuration. Current configuration: ! version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname ro-rtp ! boot system flash bootflash: boot bootldr bootflash:c7100-boot-mz.120-1.1.T boot config slot0:ro-rtp-cfg-small no logging buffered ! crypto isakmp policy 1 authentication pre-share lifetime 84600 crypto isakmp key test12345 address 172.17.2.4 ! crypto ipsec transform-set proposal1 ah-sha-hmac esp-des esp-sha-hmac mode transport ! ! crypto map s1first local-address Serial1/0 crypto map s1first 1 ipsec-isakmp set peer 172.17.2.4 set transform-set proposal1 match address 101 ! interface Tunnel1 bandwidth 180 ip address 172.24.3.6 255.255.255.0 no ip directed-broadcast tunnel source 172.24.2.5 tunnel destination 172.17.2.4 crypto map s1first ! interface FastEthernet0/0 ip address 10.1.4.2 255.255.255.0 no ip directed-broadcast no keepalive full-duplex no cdp enable ! interface Serial1/0 ip address 172.24.2.5 255.255.255.0 no ip directed-broadcast no ip mroute-cache no keepalive fair-queue 64 256 0 framing c-bit cablelength 10 dsu bandwidth 44210 clock source internal no cdp enable crypto map s1first ! ip route 10.1.3.0 255.255.255.0 Tunnel1 ip route 10.1.6.0 255.255.255.0 Tunnel1 ! access-list 101 permit gre host 172.24.2.5 host 172.17.2.4 ! line con 0 transport input none line aux 0 line vty 0 4 login ! end Extranet外聯(lián)網(wǎng)配置: Figure 3-9: Extranet VPN Scenario Physical Elements Headquarters Router配置: hq-sanjose# show running-config Building configuration. Current configuration: ! version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname hq-sanjose ! boot system flash bootflash: boot bootldr bootflash:c7100-boot-mz.120-1.1.T boot config slot0:hq-sanjose-cfg-small no logging buffered ! crypto isakmp policy 1 authentication pre-share lifetime 84600 crypto isakmp key test12345 address 172.24.2.5 crypto isakmp key test67890 address 172.23.2.7 ! crypto ipsec transform-set proposal1 ah-sha-hmac esp-des esp-sha-hmac ode transport ! crypto ipsec transform-set proposal4 ah-sha-hmac esp-des esp-sha-hmac ! ! crypto map s1first local-address Serial1/0 crypto map s1first 1 ipsec-isakmp set peer 172.24.2.5 set transform-set proposal1 match address 101 ! crypto map s4second local-address Serial2/0 crypto map s4second 2 ipsec-isakmp set peer 172.23.2.7 set transform-set proposal4 match address 111 ! interface Tunnel0 bandwidth 180 ip address 172.17.3.3 255.255.255.0 no ip directed-broadcast tunnel source 172.17.2.4 tunnel destination 172.24.2.5 crypto map s1first ! interface FastEthernet0/0 ip address 10.1.3.3 255.255.255.0 no ip directed-broadcast no keepalive full-duplex no cdp enable ! interface FastEthernet0/1 ip address 10.1.6.4 255.255.255.0 no ip directed-broadcast ip nat inside no keepalive full-duplex no cdp enable ! interface Serial1/0 ip address 172.17.2.4 255.255.255.0 no ip directed-broadcast no ip mroute-cache no keepalive fair-queue 64 256 0 framing c-bit cablelength 10 dsu bandwidth 44210 clock source internal no cdp enable crypto map s1first ! interface Serial2/0 ip address 172.16.2.2 255.255.255.0 no ip directed-broadcast ip nat outside no ip mroute-cache no keepalive fair-queue 64 256 0 framing c-bit cablelength 10 dsu bandwidth 44210 clock source internal no cdp enable crypto map s4second ! router bgp 10 network 10.2.2.2 mask 255.255.255.0 network 172.16.2.0 mask 255.255.255.0 ! ip route 10.1.4.0 255.255.255.0 Tunnel0 ! ip nat inside source static 10.1.6.5 10.2.2.2 ! access-list 101 permit gre host 172.17.2.4 host 172.24.2.5 access-list 111 permit ip host 10.2.2.2 host 10.1.5.3 ! line con 0 transport input none line aux 0 line vty 0 4 login ! end Business Partner Router 配置: bus-ptnr# show running-config Building configuration. Current configuration: ! version 12.0 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname bus-ptnr ! boot system flash bootflash: boot bootldr bootflash:c7100-boot-mz.120-1.1.T boot config slot0:bus-ptnr-cfg-small no logging buffered ! crypto isakmp policy 1 authentication pre-share lifetime 84600 crypto isakmp key test67890 address 172.16.2.2 ! crypto ipsec transform-set proposal4 ah-sha-hmac