Built PPTP service on VPS Ubuntu

First confirm uninstalling PPTPD and iptables

#apt-get Remove pptpd

Apt-get Autoremove pptpd

Apt-get Purge pptpd

#apt-get Remove iptables*

Apt-get Autoremove iptables*

Apt-get Purge iptables*

Next Install pptpd

Apt-get Install pptpd

Vi/etc/pptpd.conf

Fix the following two lines: where VPS_IP is the public IP of your VPS, can be viewed through the ifconfig command, 10.100.0.2-10 This is the IP segment assigned to the VPN user.

Localip vps_ip

Remoteip 10.100.0.2-10

Vi/etc/ppp/pptpd-options modify DNS settings, set as DNS for Google

Ms-dns 8.8.8.8

Ms-dns 8.8.4.4

Vi/etc/ppp/chap-secrets Set the VPN account number and password (* No limit)

user name, service, password, limit IP

lyf pptpd 123456 *

/ETC/INIT.D/PPTPD Restart Restart PPTPD service

Next, set the IPv4 forwarding switch for the system.

Vi/etc/sysctl.conf

net.ipv4.ip_forward=1, open the note on this line.

Run: sysctl-p Let the above fix take effect immediately

Next Install Iptables

Apt-get Install Iptables

Add a NAT (note here: venet0:0 refers to your VPS public IP NIC interface, can be viewed through ifconfig)

Iptables-t nat-a postrouting-s 10.100.0.0/24-o venet0:0-j Masquerade

Set the MTU to prevent the package from being too large

Iptables-a forward-s 10.100.0.0/24-p tcp-m tcp--tcp-flags syn,rst syn-j TCPMSS--SET-MSS 1200

Add a NAT (45.62.119.172 is the public IP of your VPS)

Iptables-t nat-a postrouting-s 10.100.0.0/24-j SNAT--to-source 45.62.119.172

Then save the iptables rule so that the rule is not lost after reboot:

Iptables-save >/etc/iptables-rules

Finally edit the network card file, load the card automatically when loading rules

Vi/etc/network/interfaces

at the end of the file, add: pre-up Iptables-restore </etc/iptables-rules

Built PPTP service on VPS Ubuntu