【正文】 erconf tRouter(config)int fa 0/0Router(configif)ip add Router(configif)no shutRouter(configif)exitRouter(config)int s2/0Router(configif)ip add Router(configif)no shutRouter(configif)exitRouter(config)router ripRouter(configrouter)ver 2Router(configrouter)no auRouter(configrouter)net Router(configrouter)defaultinformation originateRouter(configrouter)exitRouter(config)exitRoutershow ip routeCodes: 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 ISIS, L1 ISIS level1, L2 ISIS level2, ia ISIS inter area * candidate default, U peruser static route, o ODR P periodic downloaded static routeGateway of last resort is not setR [120/1] via , 00:00:06, FastEthernet0/0R [120/1] via , 00:00:06, FastEthernet0/0R [120/1] via , 00:00:06, FastEthernet0/0R [120/1] via , 00:00:06, FastEthernet0/0R [120/1] via , 00:00:06, FastEthernet0/0R [120/1] via , 00:00:06, FastEthernet0/0C , FastEthernet0/0C , Serial2/0Router允許各網(wǎng)段通過路由出去：Routerconf tRouter(config)accesslist 1 permit Router(config)accesslist 1 permit Router(config)accesslist 1 permit Router(config)accesslist 1 permit Router(config)accesslist 1 permit Router(config)accesslist 1 permit Router(config)accesslist 1 permit Router(config)int s2/0Router(configif)ip nat outsideRouter(configif)exitRouter(config)int fa 0/0Router(configif)ip nat inside Router(configif)endRouterRouterconf tRouter(config)ip route s2/0Router(config)（3）ISP路由器配置RouterenRouterconf tEnter configuration mands, one per line. End with CNTL/Z.Router(config)host ISPISP(config)int s2/0ISP(configif)ip add ISP(configif)no shutISP(configif)clock rate 64000ISP(configif)exitISP(config)int fa 0/0ISP(configif)ip add ISP(configif)no shutISP(configif)exitISP(config)（4）與ISP連接的服務(wù)器具體配置（5）連通測試在“DHCP”服務(wù)器上ping自己的網(wǎng)關(guān)：訪問外網(wǎng)服務(wù)器：現(xiàn)在能夠正常訪問ISP端的WWW服務(wù)器了。第三步：測試WWW服務(wù)器使用圖形界面訪問WWW服務(wù)器：單擊 客戶端——Desktop——Web Browser————單擊Go，結(jié)果如下圖：第四步：mail服務(wù)器測試單擊 客戶端——單擊Desktop——單擊Email——填寫Configure Mail，具體設(shè)置如下圖：注：Email Address（郵件地址）必須是自己的用戶名++MAIL（郵件）Domain Name（域名）在MAIL中查看域名，Ineing Mail Server（接受郵件服務(wù)器域名）在DNS中查看域名，Outgoing Mail Server（發(fā)送郵件服務(wù)器域名）在DNS中查看域名