[PPTP] PPTP Server On Ubuntu With Double Public IP

[Env.]

Ubuntu 14.04 LTS X86_64

Public IP_A

Public IP_B

[STEP]

(01) Test PPP

# cat /dev/ppp
cat: /dev/ppp: No such file or directory    [OK]
cat: /dev/ppp: No such device or address    [OK]
cat: /dev/ppp: Permission denied        [Not OK]

(02) Test tun/tap

# cat /dev/net/tun
cat: /dev/net/tun: File descriptor in bad state [OK]

(03) Install pptpd

# apt-get install pptpd

(04) Setup pptp

# vi /etc/pptpd.conf

localip 192.168.100.1

remoteip IP_B

# vi /etc/ppp/pptpd-options

ms-dns 8.8.8.8

ms-dns 8.8.4.4

# vi /etc/ppp/chap-secrets

username pptpd password *

# vi /etc/sysctl.conf

net.ipv4.ip_forward=1

# sysctl -p
# service pptpd restart