DEV=gre2
LOCAL_ADDR=MYIP
FILTER_ADDR=198.148.83.92
INTERNAL_ADDR=10.17.16.14
NETWORK=10.17.16.12
GATEWAY=10.17.16.13
TYPE=gre
TABLE=T1
TABLE_ID=100

DEV1=gre3
LOCAL_ADDR1=MYIP
FILTER_ADDR1=209.141.38.206
INTERNAL_ADDR1=10.17.24.2
NETWORK1=10.17.24.0
GATEWAY1=10.17.24.1
TYPE1=gre
TABLE1=T2
TABLE_ID1=101

DEV2=gre4
LOCAL_ADDR2=MYIP
FILTER_ADDR2=64.32.5.139
INTERNAL_ADDR2=10.17.13.6
NETWORK2=10.17.13.4
GATEWAY2=10.17.13.5
TYPE2=gre
TABLE2=T3
TABLE_ID2=102

MTU=1436

## DO NOT EDIT BELOW THIS LINE ##

if [[ -f /proc/user_beancounters ]]; then
if [[ ! $(ip addr show gre0 | grep gre0) ]]; then
        echo "Kernel ip_gre module not loaded or accessible. Contact your hosting company."
        exit 2
fi
fi



iptunnel add ${DEV} mode ${TYPE} local ${LOCAL_ADDR} remote ${FILTER_ADDR} ttl 255
ip addr add ${INTERNAL_ADDR}/30 dev ${DEV}
ip link set ${DEV} up

if  grep -q "${TABLE_ID} ${TABLE}" "/etc/iproute2/rt_tables" ; then
echo "Routing table already exists, skipping"
else
echo "${TABLE_ID} ${TABLE}" >> /etc/iproute2/rt_tables
fi

ip rule add from ${NETWORK}/30 table ${TABLE}
ip route add default via ${GATEWAY} table ${TABLE}

ifconfig ${DEV} mtu ${MTU}


iptunnel add ${DEV1} mode ${TYPE1} local ${LOCAL_ADDR1} remote ${FILTER_ADDR1} ttl 255
ip addr add ${INTERNAL_ADDR1}/30 dev ${DEV}
ip link set ${DEV1} up

if  grep -q "${TABLE_ID1} ${TABLE1}" "/etc/iproute2/rt_tables" ; then
echo "Routing table already exists, skipping"
else
echo "${TABLE_ID1} ${TABLE1}" >> /etc/iproute2/rt_tables
fi

ip rule add from ${NETWORK1}/30 table ${TABLE1}
ip route add default via ${GATEWAY1} table ${TABLE1}

ifconfig ${DEV1} mtu ${MTU}


iptunnel add ${DEV2} mode ${TYPE2} local ${LOCAL_ADDR2} remote ${FILTER_ADDR2} ttl 255
ip addr add ${INTERNAL_ADDR2}/30 dev ${DEV}
ip link set ${DEV2} up

if  grep -q "${TABLE_ID2} ${TABLE2}" "/etc/iproute2/rt_tables" ; then
echo "Routing table already exists, skipping"
else
echo "${TABLE_ID2} ${TABLE2}" >> /etc/iproute2/rt_tables
fi

ip rule add from ${NETWORK2}/30 table ${TABLE2}
ip route add default via ${GATEWAY2} table ${TABLE2}

ifconfig ${DEV2} mtu ${MTU}

echo "Done"