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uninstall.md

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Uninstall the VPN

Uninstall using helper script

To uninstall IPsec VPN, run the helper script:

Warning: This helper script will remove IPsec VPN from your server. All VPN configuration will be permanently deleted, and Libreswan and xl2tpd will be removed. This cannot be undone!

wget https://get.vpnsetup.net/unst -O unst.sh && sudo bash unst.sh
Click here if you are unable to download.

You may also use curl to download:

curl -fsSL https://get.vpnsetup.net/unst -o unst.sh && sudo bash unst.sh

Alternative script URLs:

https://github.com/hwdsl2/setup-ipsec-vpn/raw/master/extras/vpnuninstall.sh
https://gitlab.com/hwdsl2/setup-ipsec-vpn/-/raw/master/extras/vpnuninstall.sh

Manually uninstall the VPN

Alternatively, you may manually uninstall IPsec VPN by following these steps. Commands must be run as root, or with sudo.

Warning: These steps will remove IPsec VPN from your server. All VPN configuration will be permanently deleted, and Libreswan and xl2tpd will be removed. This cannot be undone!

Steps

First step

service ipsec stop
service xl2tpd stop
rm -rf /usr/local/sbin/ipsec /usr/local/libexec/ipsec /usr/local/share/doc/libreswan
rm -f /etc/init/ipsec.conf /lib/systemd/system/ipsec.service /etc/init.d/ipsec \
      /usr/lib/systemd/system/ipsec.service /etc/logrotate.d/libreswan \
      /usr/lib/tmpfiles.d/libreswan.conf

Second step

Ubuntu & Debian

apt-get purge xl2tpd

CentOS/RHEL, Rocky Linux, AlmaLinux, Oracle Linux & Amazon Linux 2

yum remove xl2tpd

Alpine Linux

apk del xl2tpd

Third step

Ubuntu, Debian & Alpine Linux

Edit /etc/iptables.rules and remove unneeded rules. Your original rules (if any) are backed up as /etc/iptables.rules.old-date-time. In addition, edit /etc/iptables/rules.v4 if the file exists.

CentOS/RHEL, Rocky Linux, AlmaLinux, Oracle Linux & Amazon Linux 2

Edit /etc/sysconfig/iptables and remove unneeded rules. Your original rules (if any) are backed up as /etc/sysconfig/iptables.old-date-time.

Note: If using Rocky Linux, AlmaLinux, Oracle Linux 8 or CentOS/RHEL 8 and firewalld was active during VPN setup, nftables may be configured. Edit /etc/sysconfig/nftables.conf and remove unneeded rules. Your original rules are backed up as /etc/sysconfig/nftables.conf.old-date-time.

Fourth step

Edit /etc/sysctl.conf and remove the lines after # Added by hwdsl2 VPN script.
Edit /etc/rc.local and remove the lines after # Added by hwdsl2 VPN script. DO NOT remove exit 0 (if any).

Optional

Note: This step is optional.

Remove these config files:

  • /etc/ipsec.conf*
  • /etc/ipsec.secrets*
  • /etc/ppp/chap-secrets*
  • /etc/ppp/options.xl2tpd*
  • /etc/pam.d/pluto
  • /etc/sysconfig/pluto
  • /etc/default/pluto
  • /etc/ipsec.d (directory)
  • /etc/xl2tpd (directory)

Copy and paste for fast removal:

rm -f /etc/ipsec.conf* /etc/ipsec.secrets* /etc/ppp/chap-secrets* /etc/ppp/options.xl2tpd* \
      /etc/pam.d/pluto /etc/sysconfig/pluto /etc/default/pluto
rm -rf /etc/ipsec.d /etc/xl2tpd

Remove helper scripts:

rm -f /usr/bin/ikev2.sh /opt/src/ikev2.sh \
      /usr/bin/addvpnuser.sh /opt/src/addvpnuser.sh \
      /usr/bin/delvpnuser.sh /opt/src/delvpnuser.sh

Remove fail2ban:

Note: This is optional. Fail2ban can help protect SSH on your server. Removing it is NOT recommended.

service fail2ban stop
# Ubuntu & Debian
apt-get purge fail2ban
# CentOS/RHEL, Rocky Linux, AlmaLinux, Oracle Linux & Amazon Linux 2
yum remove fail2ban
# Alpine Linux
apk del fail2ban

When finished

Reboot your server.

License

Copyright (C) 2016-2023 Lin Song View my profile on LinkedIn

Creative Commons License
This work is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License
Attribution required: please include my name in any derivative and let me know how you have improved it!