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Uninstall the VPN

Read this in other languages: English, 简体中文.

Uninstall using 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://git.io/vpnuninstall -nv -O vpnunst.sh
sudo bash vpnunst.sh

When finished, reboot your server.

Manually uninstall the VPN

Alternatively, you may manually uninstall the 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 IKEv2 script:

rm -f /usr/bin/ikev2.sh /opt/src/ikev2.sh

When finished

Reboot your server.

License

Copyright (C) 2016-2022 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!