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killmon.sh
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killmon.sh
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#!/bin/sh
#
# KILLMON v1.1.2 - Asus-Merlin IP4/IP6 Kill Switch Monitor & Configurator by Viktor Jaep, 2022
#
# KILLMON is a shell script that provides additional capabilities outside of the VPN kill switch functionality that is
# currently integrated into the Asus-Merlin Firmware. KILLMON builds on the excellent kill switch script originally
# provided by @Eibgrad, and provides a user interface to help monitor, enable, or disable kill switch operations, as well
# as allowing you to choose how to implement the kill switch for both IP4 and IP6 traffic. Currently, KILLMON provides
# traffic kill modes for 3 different scenarios...
#
# (1) Paranoid mode - All LAN traffic is forbidden from using the current WAN interface
# (2) IP Range mode - All LAN traffic within specified IP Range is forbidden from using the current WAN interface
# (3) Single IP mode - All LAN traffic on specified IP is forbidden from using the current WAN interface
#
# In each instance,a valid VPN tunnel must be up and running for traffic to make it out to the internet, preventing any
# possible traffic leaks while a VPN tunnel is down, thus the necessity for a kill switch.
#
# IMPORTANT NOTE: Many kill switches do not consider IP6, or recommend just completely disabling IP6 on the router itself.
# KILLMON may very well be one of the first kill switches that both embraces and kills the sh*t out of unwanted IP6 traffic
# when your VPN connection goes down. Please note that if IPv6 is enabled on your router and are using a kill switch of any
# kind that does not specifically block IP6, any and all traffic that utilizes IPv6 addressing will be leaking traffic
# around your IP4 VPN tunnel over your WAN when it goes down.
#Preferred standard router binaries path
export PATH="/sbin:/bin:/usr/sbin:/usr/bin:$PATH"
# -------------------------------------------------------------------------------------------------------------------------
# System Variables (Do not change beyond this point or this may change the programs ability to function correctly)
# -------------------------------------------------------------------------------------------------------------------------
Version="1.1.2"
Beta=0
APPPATH="/jffs/scripts/killmon.sh"
CFGPATH="/jffs/addons/killmon.d/killmon.cfg"
LOGFILE="/jffs/addons/killmon.d/killmon.log"
DLVERPATH="/jffs/addons/killmon.d/version.txt"
FW_CHAIN="KILLMON"
FW6_CHAIN="KILLMON6"
killswitchstatus="DISABLED" # ENABLED OR DISABLED
killswitch6status="DISABLED" # ENABLED OR DISABLED
killswitchautostart="DISABLED" # ENABLED OR DISABLED
killswitchmode="INACTIVE" # PARANOID, IP RANGE, SINGLEIP, OR INACTIVE
killswitch6mode="INACTIVE" # PARANOID, IP RANGE, SINGLEIP, OR INACTIVE
iprangenotation=1 # 0=CIDR, 1=Range
ip6rangenotation=1 # 0=CIDR, 1=Range
iprangecidr="192.168.1.0/24"
ip6rangecidr="2601:04c1:417f:e91c:0000:0000:0000:0000/64" # Local IPv6 Subnet /64
iprangefrom="192.168.1.50"
ip6rangefrom="2601:04c1:417f:e91c:0000:0000:0000:0000" # Local IPv6 Subnet Start
iprangeto="192.168.1.60"
ip6rangeto="2601:04c1:417f:e91c:0000:0000:0000:000f" # Local IPv6 Subnet End with 16 sample usable addresses
ipsingle="192.168.1.150"
ip6single="fe80::92ca:faff:fe22:97bf"
WANIFUSED=0 # 0=WAN0, 1=WAN1, OR 2=WAN0/1
WAN0IFNAME="eth0"
WAN1IFNAME="None"
hideoptions=1
# Color variables
CBlack="\e[1;30m"
InvBlack="\e[1;40m"
CRed="\e[1;31m"
InvRed="\e[1;41m"
CGreen="\e[1;32m"
InvGreen="\e[1;42m"
CDkGray="\e[1;90m"
InvDkGray="\e[1;100m"
InvLtGray="\e[1;47m"
CYellow="\e[1;33m"
InvYellow="\e[1;43m"
CBlue="\e[1;34m"
InvBlue="\e[1;44m"
CMagenta="\e[1;35m"
CCyan="\e[1;36m"
InvCyan="\e[1;46m"
CWhite="\e[1;37m"
InvWhite="\e[1;107m"
CClear="\e[0m"
# -------------------------------------------------------------------------------------------------------------------------
# Functions
# -------------------------------------------------------------------------------------------------------------------------
# LogoNM is a function that displays the RTRMON script name in a cool ASCII font without menu options
logoNM () {
echo -e "${CYellow} __ __ ______ __ __ _______ _ __"
echo -e " / //_// _/ / / / / |/ / __ \/ | / / ${CGreen}v$Version${CYellow}"
echo -e " / ,< / // / / / / /|_/ / / / / |/ /"
echo -e " / /| |_/ // /___/ /___/ / / / /_/ / /| /"
echo -e " /_/ |_/___/_____/_____/_/ /_/\____/_/ |_/${CClear}"
}
# LogoNM is a function that displays the RTRMON script name in a cool ASCII font without menu options
logo () {
echo -e "${CYellow} __ __ ______ __ __ _______ _ __"
echo -e " / //_// _/ / / / / |/ / __ \/ | / / ${CGreen}v$Version${CYellow}"
echo -e " / ,< / // / / / / /|_/ / / / / |/ / ${CRed}(S)${CGreen}etup${CYellow}"
echo -e " / /| |_/ // /___/ /___/ / / / /_/ / /| / ${CRed}(I)${CGreen}structions${CYellow}"
echo -e " /_/ |_/___/_____/_____/_/ /_/\____/_/ |_/ ${CRed}(E)${CGreen}xit${CClear}"
}
# -------------------------------------------------------------------------------------------------------------------------
# promptyn takes input for Y/N questions
promptyn () { # No defaults, just y or n
while true; do
read -p "[y/n]? " -n 1 -r yn
case "${yn}" in
[Yy]* ) return 0 ;;
[Nn]* ) return 1 ;;
* ) echo -e "\nPlease answer y or n.";;
esac
done
}
# -------------------------------------------------------------------------------------------------------------------------
# Separated these out to get the ifname for a dual-wan/failover situation where both WAN connections are on
get_wan_setting0() {
local varname varval
varname="${1}"
prefixes="wan0_"
if [ "$($timeoutcmd$timeoutsec nvram get wans_mode)" = "lb" ] ; then
for prefix in $prefixes; do
state="$($timeoutcmd$timeoutsec nvram get "${prefix}"state_t)"
sbstate="$($timeoutcmd$timeoutsec nvram get "${prefix}"sbstate_t)"
auxstate="$($timeoutcmd$timeoutsec nvram get "${prefix}"auxstate_t)"
# is_wan_connect()
[ "${state}" = "2" ] || continue
[ "${sbstate}" = "0" ] || continue
[ "${auxstate}" = "0" ] || [ "${auxstate}" = "2" ] || continue
# get_wan_ifname()
proto="$($timeoutcmd$timeoutsec nvram get "${prefix}"proto)"
if [ "${proto}" = "pppoe" ] || [ "${proto}" = "pptp" ] || [ "${proto}" = "l2tp" ] ; then
varval="$($timeoutcmd$timeoutsec nvram get "${prefix}"pppoe_"${varname}")"
else
varval="$($timeoutcmd$timeoutsec nvram get "${prefix}""${varname}")"
fi
done
else
for prefix in $prefixes; do
primary="$($timeoutcmd$timeoutsec nvram get "${prefix}"primary)"
[ "${primary}" = "1" ] && break
done
proto="$($timeoutcmd$timeoutsec nvram get "${prefix}"proto)"
if [ "${proto}" = "pppoe" ] || [ "${proto}" = "pptp" ] || [ "${proto}" = "l2tp" ] ; then
varval="$($timeoutcmd$timeoutsec nvram get "${prefix}"pppoe_"${varname}")"
else
varval="$($timeoutcmd$timeoutsec nvram get "${prefix}""${varname}")"
fi
fi
printf "%s" "${varval}"
} # get_wan_setting
# Separated these out to get the ifname for a dual-wan/failover situation where both WAN connections are on
get_wan_setting1() {
local varname varval
varname="${1}"
prefixes="wan1_"
if [ "$($timeoutcmd$timeoutsec nvram get wans_mode)" = "lb" ] ; then
for prefix in $prefixes; do
state="$($timeoutcmd$timeoutsec nvram get "${prefix}"state_t)"
sbstate="$($timeoutcmd$timeoutsec nvram get "${prefix}"sbstate_t)"
auxstate="$($timeoutcmd$timeoutsec nvram get "${prefix}"auxstate_t)"
# is_wan_connect()
[ "${state}" = "2" ] || continue
[ "${sbstate}" = "0" ] || continue
[ "${auxstate}" = "0" ] || [ "${auxstate}" = "2" ] || continue
# get_wan_ifname()
proto="$($timeoutcmd$timeoutsec nvram get "${prefix}"proto)"
if [ "${proto}" = "pppoe" ] || [ "${proto}" = "pptp" ] || [ "${proto}" = "l2tp" ] ; then
varval="$($timeoutcmd$timeoutsec nvram get "${prefix}"pppoe_"${varname}")"
else
varval="$($timeoutcmd$timeoutsec nvram get "${prefix}""${varname}")"
fi
done
else
for prefix in $prefixes; do
primary="$($timeoutcmd$timeoutsec nvram get "${prefix}"primary)"
[ "${primary}" = "1" ] && break
done
proto="$($timeoutcmd$timeoutsec nvram get "${prefix}"proto)"
if [ "${proto}" = "pppoe" ] || [ "${proto}" = "pptp" ] || [ "${proto}" = "l2tp" ] ; then
varval="$($timeoutcmd$timeoutsec nvram get "${prefix}"pppoe_"${varname}")"
else
varval="$($timeoutcmd$timeoutsec nvram get "${prefix}""${varname}")"
fi
fi
printf "%s" "${varval}"
} # get_wan_setting
# -------------------------------------------------------------------------------------------------------------------------
# iptables commands for the various modes
paranoidmode () {
iptables -N $FW_CHAIN
if [ $WANIFUSED -eq 0 ]; then
iptables -I FORWARD -i br+ -o $WAN0IFNAME -j $FW_CHAIN
iptables -A $FW_CHAIN -i br+ -o $WAN0IFNAME -j REJECT
elif [ $WANIFUSED -eq 1 ]; then
iptables -I FORWARD -i br+ -o $WAN1IFNAME -j $FW_CHAIN
iptables -A $FW_CHAIN -i br+ -o $WAN1IFNAME -j REJECT
elif [ $WANIFUSED -eq 2 ]; then
iptables -I FORWARD -i br+ -o $WAN0IFNAME -j $FW_CHAIN
iptables -I FORWARD -i br+ -o $WAN1IFNAME -j $FW_CHAIN
iptables -A $FW_CHAIN -i br+ -o $WAN0IFNAME -j REJECT
iptables -A $FW_CHAIN -i br+ -o $WAN1IFNAME -j REJECT
fi
}
paranoidmode6 () {
ip6tables -N $FW6_CHAIN
if [ $WANIFUSED -eq 0 ]; then
ip6tables -I FORWARD -i br+ -o $WAN0IFNAME -j $FW6_CHAIN
ip6tables -A $FW6_CHAIN -i br+ -o $WAN0IFNAME -j REJECT
elif [ $WANIFUSED -eq 1 ]; then
ip6tables -I FORWARD -i br+ -o $WAN1IFNAME -j $FW6_CHAIN
ip6tables -A $FW6_CHAIN -i br+ -o $WAN1IFNAME -j REJECT
elif [ $WANIFUSED -eq 2 ]; then
ip6tables -I FORWARD -i br+ -o $WAN0IFNAME -j $FW6_CHAIN
ip6tables -I FORWARD -i br+ -o $WAN1IFNAME -j $FW6_CHAIN
ip6tables -A $FW6_CHAIN -i br+ -o $WAN0IFNAME -j REJECT
ip6tables -A $FW6_CHAIN -i br+ -o $WAN1IFNAME -j REJECT
fi
}
iprangemode () {
iptables -N $FW_CHAIN
if [ $iprangenotation -eq 0 ]; then
if [ $WANIFUSED -eq 0 ]; then
iptables -I FORWARD -i br+ -o $WAN0IFNAME -j $FW_CHAIN
iptables -A $FW_CHAIN -s $iprangecidr -o $WAN0IFNAME -j REJECT
elif [ $WANIFUSED -eq 1 ]; then
iptables -I FORWARD -i br+ -o $WAN1IFNAME -j $FW_CHAIN
iptables -A $FW_CHAIN -s $iprangecidr -o $WAN1IFNAME -j REJECT
elif [ $WANIFUSED -eq 2 ]; then
iptables -I FORWARD -i br+ -o $WAN0IFNAME -j $FW_CHAIN
iptables -I FORWARD -i br+ -o $WAN1IFNAME -j $FW_CHAIN
iptables -A $FW_CHAIN -s $iprangecidr -o $WAN0IFNAME -j REJECT
iptables -A $FW_CHAIN -s $iprangecidr -o $WAN1IFNAME -j REJECT
fi
elif [ $iprangenotation -eq 1 ]; then
if [ $WANIFUSED -eq 0 ]; then
iptables -I FORWARD -i br+ -o $WAN0IFNAME -j $FW_CHAIN
iptables -A $FW_CHAIN -m iprange --src-range $iprangefrom"-"$iprangeto -j REJECT
elif [ $WANIFUSED -eq 1 ]; then
iptables -I FORWARD -i br+ -o $WAN1IFNAME -j $FW_CHAIN
iptables -A $FW_CHAIN -m iprange --src-range $iprangefrom"-"$iprangeto -j REJECT
elif [ $WANIFUSED -eq 2 ]; then
iptables -I FORWARD -i br+ -o $WAN0IFNAME -j $FW_CHAIN
iptables -I FORWARD -i br+ -o $WAN1IFNAME -j $FW_CHAIN
iptables -A $FW_CHAIN -m iprange --src-range $iprangefrom"-"$iprangeto -j REJECT
fi
fi
}
iprangemode6 () {
ip6tables -N $FW6_CHAIN
if [ $ip6rangenotation -eq 0 ]; then
if [ $WANIFUSED -eq 0 ]; then
ip6tables -I FORWARD -i br+ -o $WAN0IFNAME -j $FW6_CHAIN
ip6tables -A $FW6_CHAIN -s $ip6rangecidr -o $WAN0IFNAME -j REJECT
elif [ $WANIFUSED -eq 1 ]; then
ip6tables -I FORWARD -i br+ -o $WAN1IFNAME -j $FW6_CHAIN
ip6tables -A $FW6_CHAIN -s $ip6rangecidr -o $WAN1IFNAME -j REJECT
elif [ $WANIFUSED -eq 2 ]; then
ip6tables -I FORWARD -i br+ -o $WAN0IFNAME -j $FW6_CHAIN
ip6tables -I FORWARD -i br+ -o $WAN1IFNAME -j $FW6_CHAIN
ip6tables -A $FW6_CHAIN -s $ip6rangecidr -o $WAN0IFNAME -j REJECT
ip6tables -A $FW6_CHAIN -s $ip6rangecidr -o $WAN1IFNAME -j REJECT
fi
elif [ $ip6rangenotation -eq 1 ]; then
if [ $WANIFUSED -eq 0 ]; then
ip6tables -I FORWARD -i br+ -o $WAN0IFNAME -j $FW6_CHAIN
ip6tables -A $FW6_CHAIN -m iprange --src-range $ip6rangefrom"-"$ip6rangeto -j REJECT
elif [ $WANIFUSED -eq 1 ]; then
ip6tables -I FORWARD -i br+ -o $WAN1IFNAME -j $FW6_CHAIN
ip6tables -A $FW6_CHAIN -m iprange --src-range $ip6rangefrom"-"$ip6rangeto -j REJECT
elif [ $WANIFUSED -eq 2 ]; then
ip6tables -I FORWARD -i br+ -o $WAN0IFNAME -j $FW6_CHAIN
ip6tables -I FORWARD -i br+ -o $WAN1IFNAME -j $FW6_CHAIN
ip6tables -A $FW6_CHAIN -m iprange --src-range $ip6rangefrom"-"$ip6rangeto -j REJECT
fi
fi
}
singleipmode () {
iptables -N $FW_CHAIN
if [ $WANIFUSED -eq 0 ]; then
iptables -I FORWARD -i br+ -o $WAN0IFNAME -j $FW_CHAIN
iptables -A $FW_CHAIN -s $ipsingle -o $WAN0IFNAME -j REJECT
elif [ $WANIFUSED -eq 1 ]; then
iptables -I FORWARD -i br+ -o $WAN1IFNAME -j $FW_CHAIN
iptables -A $FW_CHAIN -s $ipsingle -o $WAN1IFNAME -j REJECT
elif [ $WANIFUSED -eq 2 ]; then
iptables -I FORWARD -i br+ -o $WAN0IFNAME -j $FW_CHAIN
iptables -I FORWARD -i br+ -o $WAN1IFNAME -j $FW_CHAIN
iptables -A $FW_CHAIN -s $ipsingle -o $WAN0IFNAME -j REJECT
iptables -A $FW_CHAIN -s $ipsingle -o $WAN1IFNAME -j REJECT
fi
}
singleipmode6 () {
ip6tables -N $FW6_CHAIN
if [ $WANIFUSED -eq 0 ]; then
ip6tables -I FORWARD -i br+ -o $WAN0IFNAME -j $FW6_CHAIN
ip6tables -A $FW6_CHAIN -s $ip6single -o $WAN0IFNAME -j REJECT
elif [ $WANIFUSED -eq 1 ]; then
ip6tables -I FORWARD -i br+ -o $WAN1IFNAME -j $FW6_CHAIN
ip6tables -A $FW6_CHAIN -s $ip6single -o $WAN1IFNAME -j REJECT
elif [ $WANIFUSED -eq 2 ]; then
ip6tables -I FORWARD -i br+ -o $WAN0IFNAME -j $FW6_CHAIN
ip6tables -I FORWARD -i br+ -o $WAN1IFNAME -j $FW6_CHAIN
ip6tables -A $FW6_CHAIN -s $ip6single -o $WAN0IFNAME -j REJECT
ip6tables -A $FW6_CHAIN -s $ip6single -o $WAN1IFNAME -j REJECT
fi
}
reverserules () {
# Reverse Paranoid Mode iptables rules
iptables -D $FW_CHAIN -i br+ -o $WAN0IFNAME -j REJECT >/dev/null 2>/dev/null
iptables -D $FW_CHAIN -i br+ -o $WAN1IFNAME -j REJECT >/dev/null 2>/dev/null
# Reverse IP Range Mode iptables rules
iptables -D $FW_CHAIN -s $iprangecidr -o $WAN0IFNAME -j REJECT >/dev/null 2>/dev/null
iptables -D $FW_CHAIN -s $iprangecidr -o $WAN1IFNAME -j REJECT >/dev/null 2>/dev/null
iptables -D $FW_CHAIN -m iprange --src-range $iprangefrom"-"$iprangeto -j REJECT >/dev/null 2>/dev/null
# Reverse Single IP Mode iptables rules
iptables -D $FW_CHAIN -s $ipsingle -o $WAN0IFNAME -j REJECT >/dev/null 2>/dev/null
iptables -D $FW_CHAIN -s $ipsingle -o $WAN1IFNAME -j REJECT >/dev/null 2>/dev/null
# Remove custom chain name
iptables -D FORWARD -i br+ -o $WAN0IFNAME -j $FW_CHAIN >/dev/null 2>/dev/null
iptables -D FORWARD -i br+ -o $WAN1IFNAME -j $FW_CHAIN >/dev/null 2>/dev/null
iptables -F $FW_CHAIN >/dev/null 2>/dev/null && iptables -X $FW_CHAIN >/dev/null 2>/dev/null
}
reverserules6 () {
# Reverse Paranoid Mode ip6tables rules
ip6tables -D $FW6_CHAIN -i br+ -o $WAN0IFNAME -j REJECT >/dev/null 2>/dev/null
ip6tables -D $FW6_CHAIN -i br+ -o $WAN1IFNAME -j REJECT >/dev/null 2>/dev/null
# Reverse IP Range Mode iptables rules
ip6tables -D $FW6_CHAIN -s $ip6rangecidr -o $WAN0IFNAME -j REJECT >/dev/null 2>/dev/null
ip6tables -D $FW6_CHAIN -s $ip6rangecidr -o $WAN1IFNAME -j REJECT >/dev/null 2>/dev/null
ip6tables -D $FW6_CHAIN -m iprange --src-range $ip6rangefrom"-"$ip6rangeto -j REJECT >/dev/null 2>/dev/null
# Reverse Single IP Mode iptables rules
ip6tables -D $FW6_CHAIN -s $ip6single -o $WAN0IFNAME -j REJECT >/dev/null 2>/dev/null
ip6tables -D $FW6_CHAIN -s $ip6single -o $WAN1IFNAME -j REJECT >/dev/null 2>/dev/null
# Remove custom chain name
ip6tables -D FORWARD -i br+ -o $WAN0IFNAME -j $FW6_CHAIN >/dev/null 2>/dev/null
ip6tables -D FORWARD -i br+ -o $WAN1IFNAME -j $FW6_CHAIN >/dev/null 2>/dev/null
ip6tables -F $FW6_CHAIN >/dev/null 2>/dev/null && ip6tables -X $FW6_CHAIN >/dev/null 2>/dev/null
}
# -------------------------------------------------------------------------------------------------------------------------
# vsetup is a function that sets up, confiures and allows you to launch RTRMON on your router...
vsetup () {
while true; do
clear
logoNM
echo ""
echo -e "${CYellow}Setup Utility${CClear}" # Provide main setup menu
echo ""
echo -e "${CGreen}----------------------------------------------------------------"
echo -e "${CGreen}Setup Operations"
echo -e "${CGreen}----------------------------------------------------------------"
echo -e "${InvDkGray}${CWhite} mc ${CClear}${CCyan}: Monitor and Configure KILLMON"
echo -e "${InvDkGray}${CWhite} fr ${CClear}${CCyan}: Force Re-install Entware Dependencies"
echo -e "${InvDkGray}${CWhite} up ${CClear}${CCyan}: Check for latest updates"
echo -e "${InvDkGray}${CWhite} vl ${CClear}${CCyan}: View logs"
echo -e "${InvDkGray}${CWhite} un ${CClear}${CCyan}: Uninstall"
echo -e "${InvDkGray}${CWhite} e ${CClear}${CCyan}: Exit"
echo -e "${CGreen}----------------------------------------------------------------"
echo ""
printf "Selection: "
read -r InstallSelection
# Execute chosen selections
case "$InstallSelection" in
mc) # Check for existence of entware, and if so proceed and install the timeout package
clear
if [ -f "/opt/bin/timeout" ]; then
sh $APPPATH -monitor
else
logoNM
echo ""
echo -e "${CYellow}Installing KILLMON Dependencies...${CClear}"
echo ""
echo -e "${CCyan}KILLMON will require the installation of CoreUtils-Timeout utility.${CClear}"
echo -e "${CCyan}These utilities require you to have Entware already installed using${CClear}"
echo -e "${CCyan}the AMTM tool. If Entware is present, the Timeout utility will be${CClear}"
echo -e "${CCyan}downloaded and installed during this setup process, and utilized by${CClear}"
echo -e "${CCyan}KILLMON${CClear}"
echo ""
echo -e "${CGreen}CoreUtils-Timeout${CCyan} is a utility that provides more stability for${CClear}"
echo -e "${CCyan}certain routers (like the RT-AC86U) which has a tendency to randomly${CClear}"
echo -e "${CCyan}hang scripts running on this router model.${CClear}"
echo ""
[ -z "$($timeoutcmd$timeoutsec nvram get odmpid)" ] && RouterModel="$($timeoutcmd$timeoutsec nvram get productid)" || RouterModel="$($timeoutcmd$timeoutsec nvram get odmpid)" # Thanks @thelonelycoder for this logic
echo -e "${CCyan}Your router model is: ${CYellow}$RouterModel"
echo ""
echo -e "${CCyan}Ready to install?${CClear}"
if promptyn "(y/n): "
then
if [ -d "/opt" ]; then # Does entware exist? If yes proceed, if no error out.
echo ""
echo -e "\n${CGreen}Updating Entware Packages...${CClear}"
echo ""
opkg update
echo ""
echo -e "${CGreen}Installing Entware CoreUtils-Timeout Package...${CClear}"
echo ""
opkg install coreutils-timeout
echo ""
read -rsp $'Press any key to continue...\n' -n1 key
echo ""
echo -e "${CGreen}Executing KILLMON Configuration Utility...${CClear}"
sleep 2
sh $APPPATH -monitor
else
clear
echo -e "${CGreen}ERROR: Entware was not found on this router...${CClear}"
echo -e "${CGreen}Please install Entware using the AMTM utility before proceeding...${CClear}"
echo ""
sleep 3
fi
else
echo ""
echo -e "\n${CGreen}Executing KILLMON Configuration Utility...${CClear}"
sleep 2
sh $APPPATH -monitor
fi
fi
;;
fr) # Force re-install the CoreUtils timeout/screen package
clear
logoNM
echo ""
echo -e "${CYellow}Force Re-installing KILLMON Dependencies...${CClear}"
echo ""
echo -e "${CCyan}KILLMON will require the installation of CoreUtils-Timeout utility.${CClear}"
echo -e "${CCyan}These utilities require you to have Entware already installed using${CClear}"
echo -e "${CCyan}the AMTM tool. If Entware is present, the Timeout utility will be${CClear}"
echo -e "${CCyan}downloaded and installed during this setup process, and utilized by${CClear}"
echo -e "${CCyan}KILLMON${CClear}"
echo ""
echo -e "${CGreen}CoreUtils-Timeout${CCyan} is a utility that provides more stability for${CClear}"
echo -e "${CCyan}certain routers (like the RT-AC86U) which has a tendency to randomly${CClear}"
echo -e "${CCyan}hang scripts running on this router model.${CClear}"
echo ""
[ -z "$(nvram get odmpid)" ] && RouterModel="$(nvram get productid)" || RouterModel="$(nvram get odmpid)" # Thanks @thelonelycoder for this logic
echo -e "${CCyan}Your router model is: ${CYellow}$RouterModel"
echo ""
echo -e "${CCyan}Force Re-install?${CClear}"
if promptyn "(y/n): "
then
if [ -d "/opt" ]; then # Does entware exist? If yes proceed, if no error out.
echo ""
echo -e "\n${CGreen}Updating Entware Packages...${CClear}"
echo ""
opkg update
echo ""
echo -e "${CGreen}Force Re-installing Entware CoreUtils-Timeout Package...${CClear}"
echo ""
opkg install --force-reinstall coreutils-timeout
echo ""
echo -e "${CGreen}Re-install completed...${CClear}"
echo ""
read -rsp $'Press any key to continue...\n' -n1 key
else
clear
echo -e "${CGreen}ERROR: Entware was not found on this router...${CClear}"
echo -e "${CGreen}Please install Entware using the AMTM utility before proceeding...${CClear}"
echo ""
sleep 3
fi
fi
;;
up)
echo ""
vupdate
;;
vl)
echo ""
vlogs
;;
un)
echo ""
vuninstall
;;
[Ee])
echo -e "${CClear}"
exit 0
;;
*)
echo ""
echo -e "${CRed}Invalid choice - Please enter a valid option...${CClear}"
echo ""
sleep 2
;;
esac
done
}
# -------------------------------------------------------------------------------------------------------------------------
# updatecheck is a function that downloads the latest update version file, and compares it with what's currently installed
updatecheck () {
# Download the latest version file from the source repository
curl --silent --retry 3 "https://raw.githubusercontent.com/ViktorJp/KILLMON/master/version.txt" -o "/jffs/addons/killmon.d/version.txt"
if [ -f $DLVERPATH ]
then
# Read in its contents for the current version file
DLVersion=$(cat $DLVERPATH)
# Compare the new version with the old version and log it
if [ "$Beta" == "1" ]; then # Check if Dev/Beta Mode is enabled and disable notification message
UpdateNotify=0
elif [ "$DLVersion" != "$Version" ]; then
UpdateNotify="Update available: v$Version -> v$DLVersion"
echo -e "$(date) - KILLMON - A new update (v$DLVersion) is available to download" >> $LOGFILE
else
UpdateNotify=0
fi
fi
}
# -------------------------------------------------------------------------------------------------------------------------
# vupdate is a function that provides a UI to check for script updates and allows you to install the latest version...
vupdate () {
updatecheck # Check for the latest version from source repository
clear
logoNM
echo ""
echo -e "${CYellow}Update Utility${CClear}"
echo ""
echo -e "${CCyan}Current Version: ${CYellow}$Version${CClear}"
echo -e "${CCyan}Updated Version: ${CYellow}$DLVersion${CClear}"
echo ""
if [ "$Version" == "$DLVersion" ]
then
echo -e "${CCyan}You are on the latest version! Would you like to download anyways?${CClear}"
echo -e "${CCyan}This will overwrite your local copy with the current build.${CClear}"
if promptyn "(y/n): "; then
echo ""
echo -e "${CCyan}Downloading KILLMON ${CYellow}v$DLVersion${CClear}"
curl --silent --retry 3 "https://raw.githubusercontent.com/ViktorJp/RTRMON/master/killmon.sh" -o "/jffs/scripts/killmon.sh" && chmod a+rx "/jffs/scripts/killmon.sh"
echo ""
echo -e "${CCyan}Download successful!${CClear}"
echo -e "$(date) - KILLMON - Successfully downloaded KILLMON v$DLVersion" >> $LOGFILE
echo ""
read -rsp $'Press any key to continue...\n' -n1 key
exec sh /jffs/scripts/killmon.sh -setup
else
echo ""
echo ""
echo -e "${CGreen}Exiting Update Utility...${CClear}"
sleep 1
return
fi
else
echo -e "${CCyan}Score! There is a new version out there! Would you like to update?${CClear}"
if promptyn "(y/n): "; then
echo ""
echo -e "${CCyan}Downloading KILLMON ${CYellow}v$DLVersion${CClear}"
curl --silent --retry 3 "https://raw.githubusercontent.com/ViktorJp/KILLMON/master/killmon.sh" -o "/jffs/scripts/killmon.sh" && chmod a+rx "/jffs/scripts/killmon.sh"
echo ""
echo -e "${CCyan}Download successful!${CClear}"
echo -e "$(date) - KILLMON - Successfully downloaded KILLMON v$DLVersion" >> $LOGFILE
echo ""
read -rsp $'Press any key to continue...\n' -n1 key
exec sh /jffs/scripts/killmon.sh -setup
else
echo ""
echo ""
echo -e "${CGreen}Exiting Update Utility...${CClear}"
sleep 1
return
fi
fi
}
# -------------------------------------------------------------------------------------------------------------------------
# vlogs is a function that calls the nano text editor to view the RTRMON log file
vlogs() {
export TERM=linux
nano +999999 --linenumbers $LOGFILE
}
# -------------------------------------------------------------------------------------------------------------------------
# vuninstall is a function that uninstalls and removes all traces of RTRMON from your router...
vuninstall () {
clear
logoNM
echo ""
echo -e "${CYellow}Uninstall Utility${CClear}"
echo ""
echo -e "${CCyan}You are about to uninstall KILLMON! This action is irreversible."
echo -e "${CCyan}Do you wish to proceed?${CClear}"
if promptyn "(y/n): "; then
echo ""
echo -e "\n${CCyan}Are you sure? Please type 'Y' to validate you want to proceed.${CClear}"
if promptyn "(y/n): "; then
clear
reverserules
reverserules6
if [ -f /jffs/scripts/firewall-start ]; then
sed -i -e '/killmon.sh/d' /jffs/scripts/firewall-start
fi
rm -r /jffs/addons/killmon.d
rm /jffs/scripts/killmon.sh
echo ""
echo -e "\n${CGreen}KILLMON has been uninstalled...${CClear}"
echo ""
exit 0
else
echo ""
echo -e "\n${CGreen}Exiting Uninstall Utility...${CClear}"
sleep 1
return
fi
else
echo ""
echo -e "\n${CGreen}Exiting Uninstall Utility...${CClear}"
sleep 1
return
fi
}
# -------------------------------------------------------------------------------------------------------------------------
# Save Config file
saveconfig () {
{ echo 'killswitchstatus="'"$killswitchstatus"'"' # ENABLED OR DISABLED
echo 'killswitchautostart="'"$killswitchautostart"'"' # ENABLED OR DISABLED
echo 'killswitchmode="'"$killswitchmode"'"' # PARANOID, IP RANGE, SINGLE IP OR INACTIVE
echo 'killswitch6status="'"$killswitch6status"'"' # ENABLED OR DISABLED
echo 'killswitch6mode="'"$killswitch6mode"'"' # PARANOID, IP RANGE, SINGLE IP, OR INACTIVE
echo 'iprangenotation='$iprangenotation
echo 'ip6rangenotation='$ip6rangenotation
echo 'iprangecidr="'"$iprangecidr"'"' # Local IPv4 Subnet in CIDR
echo 'ip6rangecidr="'"$ip6rangecidr"'"' # Local IPv6 Subnet in CIDR
echo 'iprangefrom="'"$iprangefrom"'"' # Local IPv4 Subnet Start
echo 'ip6rangefrom="'"$ip6rangefrom"'"' # Local IPv6 Subnet Start
echo 'iprangeto="'"$iprangeto"'"' # Local IPv4 Subnet End
echo 'ip6rangeto="'"$ip6rangeto"'"' # Local IPv6 Subnet End
echo 'ipsingle="'"$ipsingle"'"'
echo 'ip6single="'"$ip6single"'"'
echo 'WANIFUSED='$WANIFUSED # 0=WAN0, 1=WAN1, OR 2=WAN0/1
echo 'WAN0IFNAME="'"$WAN0IFNAME"'"'
echo 'WAN1IFNAME="'"$WAN1IFNAME"'"'
} > $CFGPATH
echo ""
echo -e "${CCyan}Applying config changes to KILLMON..."
#echo -e "$(date) - KILLMON - Successfully wrote a new config file" >> $LOGFILE
sleep 2
}
# -------------------------------------------------------------------------------------------------------------------------
# Begin Main Program
# -------------------------------------------------------------------------------------------------------------------------
#DEBUG=; set -x # uncomment/comment to enable/disable debug mode
#{ # uncomment/comment to enable/disable debug mode
# Create the necessary folder/file structure for RTRMON under /jffs/addons
if [ ! -d "/jffs/addons/killmon.d" ]; then
mkdir -p "/jffs/addons/killmon.d"
fi
# Check and see if any commandline option is being used
if [ $# -eq 0 ]
then
clear
sh /jffs/scripts/killmon.sh -monitor
exit 0
fi
# Check and see if an invalid commandline option is being used
if [ "$1" == "-h" ] || [ "$1" == "-help" ] || [ "$1" == "-log" ] || [ "$1" == "-setup" ] || [ "$1" == "-monitor" ] || [ "$1" == "-protect" ]
then
clear
else
clear
echo ""
echo "KILLMON v$Version"
echo ""
echo "Exiting due to invalid commandline options!"
echo "(run 'killmon -h' for help)"
echo ""
echo -e "${CClear}"
exit 0
fi
# Check to see if the help option is being called
if [ "$1" == "-h" ] || [ "$1" == "-help" ]
then
clear
echo ""
echo "KILLMON v$Version Commandline Option Usage:"
echo ""
echo "killmon -h | -help"
echo "killmon -log"
echo "killmon -setup"
echo "killmon -monitor"
echo "killmon -protect"
echo ""
echo " -h | -help (this output)"
echo " -log (displays the event log)"
echo " -setup (displays the setup menu)"
echo " -monitor (displays status and operations page)"
echo " -protect (populates iptables with kill switch rules)"
echo ""
echo -e "${CClear}"
exit 0
fi
# Check to see if the log option is being called, and display through nano
if [ "$1" == "-log" ]
then
vlogs
exit 0
fi
# Check to see if the populate option is being called
if [ "$1" == "-protect" ]
then
# Grab the config and read it in
if [ -f $CFGPATH ]; then
source $CFGPATH
else
clear
echo -e "${CRed}ERROR: KILLMON is not configured. Please run 'killmon.sh -setup' first."
echo -e "$(date) - KILLMON ------> ERROR: KILLMON is not configured. Please run 'killmon.sh -setup' first." >> $LOGFILE
echo -e "${CClear}"
exit 0
fi
if [ -f "/opt/bin/timeout" ] # If the timeout utility is available then use it and assign variables
then
timeoutcmd="timeout "
timeoutsec="10"
timeoutlng="60"
else
timeoutcmd=""
timeoutsec=""
timeoutlng=""
fi
# Find the current WAN0/1 Interface Names
WAN0IFNAME=$(get_wan_setting0 ifname)
WAN1IFNAME=$(get_wan_setting1 ifname)
# Determine if IPv6 is enabled
if [ "$($timeoutcmd$timeoutsec nvram get ipv6_service)" = "disabled" ] ; then
ipv6service=0
killswitch6status="DISABLED"
else
ipv6service=1
fi
# Delete any possible previous rules
if [ $ipv6service -eq 0 ]; then
reverserules
else
reverserules
reverserules6
fi
# Write the currently configured Kill Switch IP4 Rules to the iptables
if [ "$killswitchstatus" == "ENABLED" ]; then
if [ "$killswitchmode" == "PARANOID" ]; then
paranoidmode
elif [ "$killswitchmode" == "IP RANGE" ]; then
iprangemode
elif [ "$killswitchmode" == "SINGLEIP" ]; then
singleipmode
else
clear
echo -e "${CRed}ERROR: KILLMON is not configured. Please run 'killmon.sh -setup' first."
echo -e "$(date) - KILLMON ------> ERROR: KILLMON is not configured. Please run 'killmon.sh -setup'." >> $LOGFILE
sleep 3
fi
echo -e "${CGreen}INFO: KILLMON applied IP4 kill switch rules on firewall-start/router restart."
echo -e "$(date) - KILLMON - INFO: KILLMON applied IP4 kill switch rules on firewall-start/router restart." >> $LOGFILE
else
clear
echo -e "${CRed}ERROR: KILLMON is not configured. Please run 'killmon.sh -setup' first."
echo -e "$(date) - KILLMON ------> ERROR: KILLMON is not configured. Please run 'killmon.sh -setup'." >> $LOGFILE
sleep 3
fi
# Write the currently configured Kill Switch IP6 Rules to the iptables
if [ $ipv6service -ne 0 ]; then
if [ "$killswitch6status" == "ENABLED" ]; then
if [ "$killswitch6mode" == "PARANOID" ]; then
paranoidmode6
elif [ "$killswitch6mode" == "IP RANGE" ]; then
iprangemode6
elif [ "$killswitch6mode" == "SINGLEIP" ]; then
singleipmode6
else
clear
echo -e "${CRed}ERROR: KILLMON is not configured. Please run 'killmon.sh -setup' first."
echo -e "$(date) - KILLMON ------> ERROR: KILLMON is not configured. Please run 'killmon.sh -setup'." >> $LOGFILE
sleep 3
fi
echo -e "${CGreen} INFO: KILLMON applied IP6 kill switch rules on firewall-start/router restart."
echo -e "$(date) - KILLMON - INFO: KILLMON applied IP6 kill switch rules on firewall-start/router restart." >> $LOGFILE
else
clear
echo -e "${CRed} ERROR: KILLMON is not configured. Please run 'killmon.sh -setup' first."
echo -e "$(date) - KILLMON ------> ERROR: KILLMON is not configured. Please run 'killmon.sh -setup'." >> $LOGFILE
sleep 3
fi
fi
echo -e "${CClear}"
exit 0
fi
# Check to see if the setup option is being called
if [ "$1" == "-setup" ]
then
vsetup
fi
# Check to see if the monitor option is being called
if [ "$1" == "-monitor" ]
then
# Check for and add an alias for RTRMON
if ! grep -F "sh /jffs/scripts/killmon.sh" /jffs/configs/profile.add >/dev/null 2>/dev/null; then
echo "alias killmon=\"sh /jffs/scripts/killmon.sh\" # KILLMON" >> /jffs/configs/profile.add
fi
if [ -f "/opt/bin/timeout" ] # If the timeout utility is available then use it and assign variables
then
timeoutcmd="timeout "
timeoutsec="10"
timeoutlng="60"
else
timeoutcmd=""
timeoutsec=""
timeoutlng=""
fi
# Determine if IPv6 is enabled
if [ "$($timeoutcmd$timeoutsec nvram get ipv6_service)" = "disabled" ]; then
ipv6service=0
killswitch6status="DISABLED"
else
ipv6service=1
fi
sleep 1
fi
while true; do
if [ -f $CFGPATH ]; then
source $CFGPATH
fi
# Check for Updates
updatecheck
WAN0IFNAME=$(get_wan_setting0 ifname)
WAN1IFNAME=$(get_wan_setting1 ifname)
clear
logo
if [ "$UpdateNotify" != "0" ]; then
echo -e "${CRed} $UpdateNotify${CClear}"
echo ""
else
echo ""
fi
echo -e "${InvDkGray}${CWhite} Status ${CClear}"
echo ""
if [ $ipv6service -eq 0 ]; then
if [ "$killswitchstatus" == "DISABLED" ]; then
echo -e "${InvRed} ${CClear}${CWhite} IP4 Kill Switch ${CClear}: ${InvRed}${CWhite}DISABLED ${CClear} | ${InvDkGray} ${CClear}${CWhite} IP6 Protocol ${CClear}: ${InvDkGray}${CWhite}DISABLED ${CClear}"
elif [ "$killswitchstatus" == "ENABLED" ]; then
echo -e "${InvGreen} ${CClear}${CWhite} IP4 Kill Switch ${CClear}: ${InvGreen}${CWhite}ENABLED ${CClear} | ${InvDkGray} ${CClear}${CWhite} IP6 Protocol ${CClear}: ${InvDkGray}${CWhite}DISABLED ${CClear}"
fi
else
if [ "$killswitchstatus" == "DISABLED" ] && [ "$killswitch6status" == "DISABLED" ]; then
echo -e "${InvRed} ${CClear}${CWhite} IP4 Kill Switch ${CClear}: ${InvRed}${CWhite}DISABLED ${CClear} | ${InvRed} ${CClear}${CWhite} IP6 Kill Switch ${CClear}: ${InvRed}${CWhite}DISABLED ${CClear}"
elif [ "$killswitchstatus" == "ENABLED" ] && [ "$killswitch6status" == "DISABLED" ]; then
echo -e "${InvGreen} ${CClear}${CWhite} IP4 Kill Switch ${CClear}: ${InvGreen}${CWhite}ENABLED ${CClear} | ${InvRed} ${CClear}${CWhite} IP6 Kill Switch ${CClear}: ${InvRed}${CWhite}DISABLED ${CClear}"
elif [ "$killswitchstatus" == "DISABLED" ] && [ "$killswitch6status" == "ENABLED" ]; then
echo -e "${InvRed} ${CClear}${CWhite} IP4 Kill Switch ${CClear}: ${InvRed}${CWhite}DISABLED ${CClear} | ${InvGreen} ${CClear}${CWhite} IP6 Kill Switch ${CClear}: ${InvGreen}${CWhite}ENABLED ${CClear}"
elif [ "$killswitchstatus" == "ENABLED" ] && [ "$killswitch6status" == "ENABLED" ]; then
echo -e "${InvGreen} ${CClear}${CWhite} IP4 Kill Switch ${CClear}: ${InvGreen}${CWhite}ENABLED ${CClear} | ${InvGreen} ${CClear}${CWhite} IP6 Kill Switch ${CClear}: ${InvGreen}${CWhite}ENABLED ${CClear}"
fi
fi
if [ $ipv6service -eq 0 ]; then
KILLMONRULESCHECK=$(iptables -L | grep -c "KILLMON")
if [ $KILLMONRULESCHECK -eq 0 ]; then
echo -e "${InvRed} ${CClear}${CWhite} iptables Rules ${CClear}: ${InvRed}${CWhite}NOT FOUND${CClear} |"
elif [ $KILLMONRULESCHECK -gt 0 ]; then
echo -e "${InvGreen} ${CClear}${CWhite} iptables Rules ${CClear}: ${InvGreen}${CWhite}VERIFIED ${CClear} |"
fi
else
KILLMONRULESCHECK=$(iptables -L | grep -c "KILLMON")
KILLMONRULES6CHECK=$(ip6tables -L | grep -c "KILLMON")
if [ $KILLMONRULESCHECK -eq 0 ] && [ $KILLMONRULES6CHECK -eq 0 ]; then
echo -e "${InvRed} ${CClear}${CWhite} iptables Rules ${CClear}: ${InvRed}${CWhite}NOT FOUND${CClear} | ${InvRed} ${CClear}${CWhite} ip6tables Rules ${CClear}: ${InvRed}${CWhite}NOT FOUND${CClear}"
elif [ $KILLMONRULESCHECK -gt 0 ] && [ $KILLMONRULES6CHECK -eq 0 ]; then
echo -e "${InvGreen} ${CClear}${CWhite} iptables Rules ${CClear}: ${InvGreen}${CWhite}VERIFIED ${CClear} | ${InvRed} ${CClear}${CWhite} ip6tables Rules ${CClear}: ${InvRed}${CWhite}NOT FOUND${CClear}"
elif [ $KILLMONRULESCHECK -eq 0 ] && [ $KILLMONRULES6CHECK -gt 0 ]; then
echo -e "${InvRed} ${CClear}${CWhite} iptables Rules ${CClear}: ${InvRed}${CWhite}NOT FOUND${CClear} | ${InvGreen} ${CClear}${CWhite} ip6tables Rules ${CClear}: ${InvGreen}${CWhite}VERIFIED ${CClear}"
elif [ $KILLMONRULESCHECK -gt 0 ] && [ $KILLMONRULES6CHECK -gt 0 ]; then
echo -e "${InvGreen} ${CClear}${CWhite} iptables Rules ${CClear}: ${InvGreen}${CWhite}VERIFIED ${CClear} | ${InvGreen} ${CClear}${CWhite} ip6tables Rules ${CClear}: ${InvGreen}${CWhite}VERIFIED ${CClear}"
fi
fi
if [ "$killswitchautostart" == "DISABLED" ]; then
echo -en "${InvRed} ${CClear}${CWhite} Reboot Protection ${CClear}: "
printf "${InvRed}${CWhite}DISABLED ${CClear} |"; printf "%s\n"
else
echo -en "${InvGreen} ${CClear}${CWhite} Reboot Protection ${CClear}: "
printf "${InvGreen}${CWhite}ENABLED ${CClear} |"; printf "%s\n"
fi
echo -e "${CWhite} ${CClear}${CCyan}"
if [ $ipv6service -eq 0 ]; then
echo -e "${InvDkGray}${CWhite} ${CClear}${CWhite} IP4 Kill Mode ${CClear}: ${CGreen}$killswitchmode${CClear}"
else
echo -e "${InvDkGray}${CWhite} ${CClear}${CWhite} IP4 Kill Mode ${CClear}: ${CGreen}$killswitchmode${CClear} | ${InvDkGray}${CWhite} ${CClear}${CWhite} IP6 Kill Mode ${CClear}: ${CGreen}$killswitch6mode${CClear}"
fi
echo ""
echo -en "${InvDkGray}${CWhite} ${CClear}${CWhite} IP4(s) affected ${CClear}: ${CGreen}"
if [ $iprangenotation -eq 0 ] && [ "$killswitchmode" == "IP RANGE" ]; then
printf $iprangecidr; printf "%s\n"
elif [ $iprangenotation -eq 1 ] && [ "$killswitchmode" == "IP RANGE" ]; then
printf $iprangefrom"-"$iprangeto; printf "%s\n"
elif [ ! -z "$ipsingle" ] && [ "$killswitchmode" == "SINGLEIP" ]; then
printf $ipsingle; printf "%s\n"
elif [ "$killswitchmode" == "PARANOID" ]; then
printf "ALL"; printf "%s\n"
else
printf "UNDEFINED"; printf "%s\n"
fi
if [ $ipv6service -ne 0 ]; then