没有路由器的情况下，linux也是需要拨号上网的。
从安装光盘Packages中取出下面三个包
libpcap-1.4.0-4.0826git2dbcaa1.el6.x86_64.rpm
ppp-2.4.5-10.el6.x86_64.rpm
rp-pppoe-3.10-16.el6.x86_64.rpm
使用rpm -ivh 安装#rpm-ivhlibpcap-1.4.0-4.0826git2dbcaa1.el6.x86_64.rpmppp-2.4.5-10.el6.x86_64.rpmppp-2.4.5-10.el6.x86_64.rpm
warning:packageppp=2.4.5-10.el6wasalreadyadded,skippingppp=2.4.5-10.el6
Preparing...###########################################[100%]
1:libpcap###########################################[50%]
2:ppp###########################################[100%]
进入/usr/sbin/ 执行adsl-setup进行配置#/usr/sbin/adsl-setup
WelcometothePPPoEclientsetup.First,Iwillrunsomecheckson
yoursystemtomakesurethePPPoEclientisinstalledproperly...
LOGINNAME
EnteryourLoginName(defaultroot):
INTERFACE
EntertheEthernetinterfaceconnectedtothePPPoEmodem
ForSolaris,thisislikelytobesomethinglike/dev/hme0.
ForLinux,itwillbeethX,where'X'isanumber.
(defaulteth0):
Doyouwantthelinktocomeupondemand,orstayupcontinuously?
Ifyouwantittocomeupondemand,entertheidletimeinseconds
afterwhichthelinkshouldbedropped.Ifyouwantthelinkto
stayuppermanently,enter'no'(twoletters,lower-case.)
NOTE:Demand-activatedlinksdonotinteractwellwithdynamicIP
addresses.Youmayhavesomeproblemswithdemand-activatedlinks.
Enterthedemandvalue(defaultno):
DNS
PleaseentertheIPaddressofyourISP'sprimaryDNSserver.
IfyourISPclaimsthat'theserverwillprovidedynamicDNSaddresses',
enter'server'(alllower-case)here.
Ifyoujustpressenter,Iwillassumeyouknowwhatyouare
doingandnotmodifyyourDNSsetup.
EntertheDNSinformationhere:server
PASSWORD
PleaseenteryourPassword:
[root@ashome]#/usr/sbin/adsl-setup
WelcometothePPPoEclientsetup.First,Iwillrunsomecheckson
yoursystemtomakesurethePPPoEclientisinstalledproperly...
LOGINNAME
EnteryourLoginName(defaultroot):此处填写宽带帐号
INTERFACE
EntertheEthernetinterfaceconnectedtothePPPoEmodem
ForSolaris,thisislikelytobesomethinglike/dev/hme0.
ForLinux,itwillbeethX,where'X'isanumber.
(defaulteth0):
Doyouwantthelinktocomeupondemand,orstayupcontinuously?
Ifyouwantittocomeupondemand,entertheidletimeinseconds
afterwhichthelinkshouldbedropped.Ifyouwantthelinkto
stayuppermanently,enter'no'(twoletters,lower-case.)
NOTE:Demand-activatedlinksdonotinteractwellwithdynamicIP
addresses.Youmayhavesomeproblemswithdemand-activatedlinks.
Enterthedemandvalue(defaultno):
DNS
PleaseentertheIPaddressofyourISP'sprimaryDNSserver.
IfyourISPclaimsthat'theserverwillprovidedynamicDNSaddresses',
enter'server'(alllower-case)here.
Ifyoujustpressenter,Iwillassumeyouknowwhatyouare
doingandnotmodifyyourDNSsetup.
EntertheDNSinformationhere:
PASSWORD
PleaseenteryourPassword:
Pleasere-enteryourPassword:
USERCTRL
Pleaseenter'yes'(threeletters,lower-case.)ifyouwanttoallow
normalusertostartorstopDSLconnection(defaultyes):
FIREWALLING
Pleasechoosethefirewallrulestouse.Notethattheserulesare
verybasic.Youarestronglyencouragedtouseamoresophisticated
firewallsetup;however,thesewillprovidebasicsecurity.Ifyou
arerunninganyserversonyourmachine,youmustchoose'NONE'and
setupfirewallingyourself.Otherwise,thefirewallruleswilldeny
accesstoallstandardserverslikeWeb,e-mail,ftp,etc.Ifyou
areusingSSH,theruleswillblockoutgoingSSHconnectionswhich
allocateaprivilegedsourceport.
Thefirewallchoicesare:
0-NONE:Thisscriptwillnotsetanyfirewallrules.Youareresponsible
forensuringthesecurityofyourmachine.YouareSTRONGLY
recommendedtousesomekindoffirewallrules.
1-STANDALONE:Appropriateforabasicstand-aloneweb-surfingworkstation
2-MASQUERADE:AppropriateforamachineactingasanInternetgateway
foraLAN
Chooseatypeoffirewall(0-2):0
Startthisconnectionatboottime
Doyouwanttostartthisconnectionatboottime?
Pleaseenternooryes(defaultno):yes
**Summaryofwhatyouentered**
EthernetInterface:eth0
Username:此处为宽带帐号
Activate-on-demand:No
DNS:Donotadjust
Firewalling:NONE
UserControl:yes
Acceptthesesettingsandadjustconfigurationfiles(y/n)?y
Adjusting/etc/sysconfig/network-scripts/ifcfg-ppp0
Adjusting/etc/ppp/chap-secretsand/etc/ppp/pap-secrets
(Butfirstbackingitupto/etc/ppp/chap-secrets.bak)
(Butfirstbackingitupto/etc/ppp/pap-secrets.bak)
Congratulations,itshouldbeallsetup!
Type'/sbin/ifupppp0'tobringupyourxDSLlinkand'/sbin/ifdownppp0'
tobringitdown.
Type'/sbin/pppoe-status/etc/sysconfig/network-scripts/ifcfg-ppp0'
toseethelinkstatus.
启动adsl -start
停止adsl -stop
