configure pptp client on centos7 to connect vpn

发表于 更新于 分类于 阅读次数：
  • install ppp pptp pptp-setup
    # yum install ppp pptp pptp-setup
  • create vpn connect
    # pptpsetup --create vpnName --server vpnServerIPOrDomain --username vpnUserName --password vpnUserPassword --start
  • if error like this:
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FATAL: Module ppp_mppe not found.  
/usr/sbin/pptpsetup: couldn't find MPPE support in kernel.
  • solution:
    # modprobe ppp_mppe
  • connect to vpn server
    # pppd call vpnName
  • if error like this:
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Using interface ppp0  
Connect: ppp0 <--> /dev/pts/3  
CHAP authentication succeeded  
LCP terminated by peer (MPPE required but peer refused)  
Modem hangup
  • solution:
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# vi /etc/ppp/peers/vpnName // vpnName is the connection above created
add following configuration at the end of this file:
require-mppe-128
  • recall vpn connect command
    # pppd call vpnName

if vpn connected successfully, we will get a virtual network interface named ppp0, like this:

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# ifconfig -a
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.2  netmask 255.255.255.0  broadcast 10.161.63.255
        ether 00:16:3e:02:2a:aa  txqueuelen 1000  (Ethernet)
        RX packets 4219  bytes 4656497 (4.4 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2291  bytes 179470 (175.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        
ppp0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST>  mtu 1496
        inet 172.16.36.2  netmask 255.255.255.255  destination 172.16.36.1
        ppp  txqueuelen 3  (Point-to-Point Protocol)
        RX packets 8  bytes 228 (228.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 8  bytes 234 (234.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
  • Disconnect from VPN PPTP
    pkill pppd