80 lines
1.7 KiB
Bash
Executable File
80 lines
1.7 KiB
Bash
Executable File
#!/bin/bash --posix
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set -e
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IP=""
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INBOUND_PORT=""
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FORWARD_PORT=""
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usage() {
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printf "%s" "Usage:
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--ip
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The ip address to forward data to
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Example:
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--ip 192.168.10.11
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--inbound-port
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The port that data will be received on
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Example:
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--inbound-port 22
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--forward-port
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The port that data will be forwarded to
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Example:
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--forward-port 2020
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All above flags must be passed with arguments"
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}
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error() {
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printf '%s\n' "$1" >&2
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exit 1
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}
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while :; do
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case $1 in
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-h | -\? | --help)
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usage # Display a usage synopsis.
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exit
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;;
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--) # End of all options.
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shift
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break
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;;
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--ip)
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shift
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[[ "${1}" == "" ]] && error "--ip requires an argument"
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IP=${1}
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;;
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--inbound-port)
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shift
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[[ "${1}" == "" ]] && error "--inbound-port requires an argument"
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INBOUND_PORT=${1}
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;;
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--forward-port)
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shift
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[[ "${1}" == "" ]] && error "--forward-port requires an argument"
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FORWARD_PORT=${1}
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;;
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-?*)
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printf 'Unknown option: %s\n' "$1" >&2
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usage
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;;
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*) # Default case: No more options, so break out of the loop.
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break ;;
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esac
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shift
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done
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[[ "${IP}" == "" ]] && error "--ip requires an argument"
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[[ "${FORWARD_PORT}" == "" ]] && error "--forward-port requires an argument"
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[[ "${INBOUND_PORT}" == "" ]] && error "--inbound-port requires an argument"
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firewall-cmd --permanent --add-forward-port=port="${INBOUND_PORT}":proto=tcp:toaddr="${IP}":toport="${FORWARD_PORT}"
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firewall-cmd --permanent --add-port="${INBOUND_PORT}"/tcp
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firewall-cmd --add-masquerade --permanent
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firewall-cmd --reload
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echo "Routing all data on ${INBOUND_PORT} to ${IP}:${FORWARD_PORT}"
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