setup-ipsec-vpn/docs/uninstall.md

Uninstall the VPN

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Follow these steps to remove the VPN. Commands must be run as root, or with sudo.

Steps

• First step
• Second step
• Third step
• Fourth step
• Optional
• When finished

First step

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

Second step

Ubuntu/Debian

apt-get purge xl2tpd

CentOS/RHEL

yum remove xl2tpd

Third step

Ubuntu/Debian

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

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 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

When finished

Reboot your server.