port_forward
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#!/bin/bash
if [[ "$1" == "stop" ]]; then
printf "Reloading firewall.. "
firewall-cmd --reload
exit $?
fi
function usage () {
printf "\nUsage:
$0 FROM_PORT TO_ADDR:TO_PORT [PROTO]
$0 stop
FROM_PORT External port on public zone
TO_ADDR Destination address
TO_PORT Destination port
PROTO Protocol (tcp/udp, optional,
defaults to tcp)
stop Remove port forwarding
Example:
$0 8080 192.168.122.122:80
- will forward connections coming to port 80 to
a VM with address 192.168.122.122
\n"
exit 0
}
function forward () {
echo "Creating port forward from port $FROM_PORT/$PROTO to $TO_ADDR:$TO_PORT."
printf "Enabling masquerade... "
firewall-cmd --add-masquerade
printf "Adding port forward... "
firewall-cmd --add-forward-port=port=${FROM_PORT}:proto=${PROTO}:toport=${TO_PORT}:toaddr=${TO_ADDR}
# iptables -D LIBVIRT_FWI -o virbr0 -j REJECT --reject-with icmp-port-unreachable
# iptables -D LIBVIRT_FWO -i virbr0 -j REJECT --reject-with icmp-port-unreachable
echo "Done."
exit 0
}
if [ "$#" -lt 2 ] || [ "$#" -gt 3 ]; then
usage
fi
if [ "$UID" -ne 0 ]; then
echo "Run as root."
exit 1
fi
FROM_PORT=$1
TO_ADDR=${2%:*}
TO_PORT=${2##*:}
PROTO=${3:-'tcp'}
if [[ ! "$TO_ADDR" =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
printf "Resolved %s as " "$TO_ADDR"
TO_ADDR=`dig +short "$TO_ADDR" | head -1`
printf "%s\n" "$TO_ADDR"
fi
if [[ "$PROTO" != "tcp" ]] && [[ "$PROTO" != "udp" ]]; then
usage
fi
forward
| 1 | #!/bin/bash |
| 2 | |
| 3 | if [[ "$1" == "stop" ]]; then |
| 4 | printf "Reloading firewall.. " |
| 5 | firewall-cmd --reload |
| 6 | exit $? |
| 7 | fi |
| 8 | |
| 9 | function usage () { |
| 10 | printf "\nUsage: |
| 11 | |
| 12 | $0 FROM_PORT TO_ADDR:TO_PORT [PROTO] |
| 13 | $0 stop |
| 14 | |
| 15 | FROM_PORT External port on public zone |
| 16 | TO_ADDR Destination address |
| 17 | TO_PORT Destination port |
| 18 | PROTO Protocol (tcp/udp, optional, |
| 19 | defaults to tcp) |
| 20 | stop Remove port forwarding |
| 21 | |
| 22 | Example: |
| 23 | |
| 24 | $0 8080 192.168.122.122:80 |
| 25 | - will forward connections coming to port 80 to |
| 26 | a VM with address 192.168.122.122 |
| 27 | \n" |
| 28 | exit 0 |
| 29 | } |
| 30 | |
| 31 | function forward () { |
| 32 | echo "Creating port forward from port $FROM_PORT/$PROTO to $TO_ADDR:$TO_PORT." |
| 33 | |
| 34 | printf "Enabling masquerade... " |
| 35 | firewall-cmd --add-masquerade |
| 36 | printf "Adding port forward... " |
| 37 | firewall-cmd --add-forward-port=port=${FROM_PORT}:proto=${PROTO}:toport=${TO_PORT}:toaddr=${TO_ADDR} |
| 38 | # iptables -D LIBVIRT_FWI -o virbr0 -j REJECT --reject-with icmp-port-unreachable |
| 39 | # iptables -D LIBVIRT_FWO -i virbr0 -j REJECT --reject-with icmp-port-unreachable |
| 40 | |
| 41 | echo "Done." |
| 42 | exit 0 |
| 43 | } |
| 44 | |
| 45 | |
| 46 | |
| 47 | if [ "$#" -lt 2 ] || [ "$#" -gt 3 ]; then |
| 48 | usage |
| 49 | fi |
| 50 | |
| 51 | if [ "$UID" -ne 0 ]; then |
| 52 | echo "Run as root." |
| 53 | exit 1 |
| 54 | fi |
| 55 | |
| 56 | FROM_PORT=$1 |
| 57 | TO_ADDR=${2%:*} |
| 58 | TO_PORT=${2##*:} |
| 59 | PROTO=${3:-'tcp'} |
| 60 | |
| 61 | if [[ ! "$TO_ADDR" =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then |
| 62 | printf "Resolved %s as " "$TO_ADDR" |
| 63 | TO_ADDR=`dig +short "$TO_ADDR" | head -1` |
| 64 | printf "%s\n" "$TO_ADDR" |
| 65 | fi |
| 66 | |
| 67 | if [[ "$PROTO" != "tcp" ]] && [[ "$PROTO" != "udp" ]]; then |
| 68 | usage |
| 69 | fi |
| 70 | |
| 71 | forward |