RaspberryPi VPN
RaspberryPi VPN Client 
특히 LTE 네트워크를 VPN에 연결하여 서버로 서비스하기 위한 가장 간단한 방법 
https://youtu.be/DSE17AkOQQs?si=BfHhTD18APqzzg8w

실행 동영상
실행 동영상 

RaspberryPi VPN Client
sudo apt-get install pptp-linux -y 
 hyunsu@zero2:~ $ sudo apt-get install pptp-linux -y
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following package was automatically installed and is no longer required:
 libfuse2
Use 'sudo apt autoremove' to remove it.
The following NEW packages will be installed:
 pptp-linux
0 upgraded, 1 newly installed, 0 to remove and 3 not upgraded.
Need to get 51.2 kB of archives.
After this operation, 108 kB of additional disk space will be used.
Get:1 http://ftp.kaist.ac.kr/raspbian/raspbian bullseye/main armhf pptp-linux armhf 1.10.0-1 [51.2 kB]
Fetched 51.2 kB in 5s (9,683 B/s)
Selecting previously unselected package pptp-linux.
(Reading database ... 108666 files and directories currently installed.)
Preparing to unpack .../pptp-linux_1.10.0-1_armhf.deb ...
Unpacking pptp-linux (1.10.0-1) ...
Setting up pptp-linux (1.10.0-1) ...
Processing triggers for man-db (2.9.4-2) ...
hyunsu@zero2:~ $
hyunsu@zero2:~ $
 
 iptime vpn 설정  
 lte 계정을 만들고 연결한다.  
 
 hyunsu@zero2:~ $ sudo pptpsetup --create joang --server web.joang.com --username lte --password 비밀번호 --encrypt --start
Using interface ppp0
Connect: ppp0 <--> /dev/pts/2
CHAP authentication succeeded
MPPE 128-bit stateless compression enabled
 
 
 결과  
 hyunsu@zero2:~ $ ifconfig
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
 inet 127.0.0.1 netmask 255.0.0.0
 inet6 ::1 prefixlen 128 scopeid 0x10<host>
 loop txqueuelen 1000 (Local Loopback)
 RX packets 50120 bytes 1032645911 (984.8 MiB)
 RX errors 0 dropped 0 overruns 0 frame 0
 TX packets 50120 bytes 1032645911 (984.8 MiB)
 TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

ppp0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> mtu 1496
 inet 192.168.0.254 netmask 255.255.255.255 destination 192.168.0.1
 ppp txqueuelen 3 (Point-to-Point Protocol)
 RX packets 17 bytes 989 (989.0 B)
 RX errors 0 dropped 0 overruns 0 frame 0
 TX packets 17 bytes 450 (450.0 B)
 TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
 inet 192.168.0.23 netmask 255.255.255.0 broadcast 192.168.0.255
 inet6 fe80::bec4:4f25:e298:a23d prefixlen 64 scopeid 0x20<link>
 ether d8:3a:dd:89:90:4e txqueuelen 1000 (Ethernet)
 RX packets 6451585 bytes 372770121 (355.5 MiB)
 RX errors 0 dropped 0 overruns 0 frame 0
 TX packets 34853176 bytes 529084637 (504.5 MiB)
 TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

hyunsu@zero2:~ $
 
 
 연결 : sudo pon joang 
 끊기 : sudo poff joang 
 
 접속로그 확인

 
 

sudo pon joang debug dump logfd 2 nodetach 
 
 VPN 바꾸기  
 sudo route add default dev ppp1  ppp1을 우선 라우트 한다.  
 
 마지막으로 지속적으로 VPN접속을 확인하고 , 재부팅 시에도 일정 시간 후 실행하게 만든다.  
 */30 * * * * /root/startVPN.sh > /home/hyunsu/vpn.log 
 #!/bin/bash

export _SDATE=$(date +"%Y%m%d%H")

echo
echo '##### START VPN #####'
echo

PSID=`ps -ef | grep 'pptp web.joang.com' | grep -v grep | awk '{print($2)}'`
PSIDLENG=${#PSID}

if [[ $PSIDLENG -gt 0 ]]
then
 echo "[$_SDATE] $PSIDLENG process starting !"
else
 echo "[$_SDATE] Need Start VPN"
 sudo pptpsetup --create joang --server web.joang.com --username lte --password 비밀번호 --encrypt --start
 sleep 10
 PSID=`ps -ef | grep 'pptp web.joang.com' | grep -v grep | awk '{print($2)}'`
 echo "[$_SDATE] Processes = $PSID"
 sudo route add default dev ppp1
 echo "[$_SDATE] Defalut route is ppp1"
fi

echo
echo '##### STOP VPN #####'
echo