#!/bin/sh##  Bring down vpn routing.#  calculate the network addressremote_network=`ipcalc -n "$remote"/"$remote_netmask_bits"`remote_network="${remote_network#*=}"#  clear routing via VPNip route del "$remote_network"/"$remote_netmask_bits" via "$5" table vpn.outip route del table vpnonly.out via "$5"iptables -D OUTPUT -t mangle -p "$proto" \		-d "$remote_network"/"$remote_netmask_bits" \		--dport "$remote_port" -j ACCEPTiptables -D OUTPUT -t mangle -d "$remote" -j MARK --set-mark 2#  undo the ICMP ping tunnelingiptables -D OUTPUT -t mangle --protocol icmp --icmp-type echo-request \		-j MARK --set-mark 3#  flush route cacheip route flush cache