allow no script, refactor systemd service

[vpn-setup] / vpn-server-setup

diff --git a/vpn-server-setup b/vpn-server-setup
index 797594620aa416921054df9076af86959ed7bdba..312ddff11071a03c98cc9c174c5df60aaebd7a75 100755 (executable)
--- a/vpn-server-setup
+++ b/vpn-server-setup
@@ -261,31 +261,23 @@ sysctl -p /etc/sysctl.conf
 
 gw=$(ip route | sed -rn 's/^default via .* dev (\S+).*/\1/p' | head -n1)
 
-cat >/etc/systemd/system/vpnnat.service <<EOF
-[Unit]
-Description=Turns on nat iptables setting
-
-[Install]
-WantedBy=$vpn_service.service
-
+d=/etc/systemd/system/$vpn_service.service.d
+mkdir -p $d
+f=$d/nat.conf
+cat >$f <<EOF
 [Service]
-Type=oneshot
-RemainAfterExit=yes
-ExecStart=/sbin/iptables -t nat -A POSTROUTING -s $ip4.0/24 -o $gw -j MASQUERADE
-ExecStop=/sbin/iptables -t nat -D POSTROUTING -s $ip4.0/24 -o $gw -j MASQUERADE
+ExecStartPre=/sbin/iptables -t nat -A POSTROUTING -s $ip4.0/24 -o $gw -j MASQUERADE
+ExecStopPost=/sbin/iptables -t nat -D POSTROUTING -s $ip4.0/24 -o $gw -j MASQUERADE
 EOF
-
-
 if [[ $ip6net ]]; then
-  cat >>/etc/systemd/system/vpnnat.service <<EOF
-ExecStart=/sbin/ip6tables -t nat -A POSTROUTING -s $ip6net -o $gw -j MASQUERADE
-ExecStop=/sbin/ip6tables -t nat -D POSTROUTING -s $ip6net -o $gw -j MASQUERADE
+  cat >>$f <<EOF
+ExecStartPre=/sbin/ip6tables -t nat -A POSTROUTING -s $ip6net -o $gw -j MASQUERADE
+ExecStopPost=/sbin/ip6tables -t nat -D POSTROUTING -s $ip6net -o $gw -j MASQUERADE
 EOF
-systemctl daemon-reload # needed if the file was already there
-# note, no need to start it, the vpn_service does that.
-systemctl enable vpnnat
+  systemctl daemon-reload # needed if the file was already there
 
-if $start; then
-  systemctl enable $vpn_service
-  systemctl restart $vpn_service
+  if $start; then
+    systemctl enable $vpn_service
+    systemctl restart $vpn_service
+  fi
 fi