#!/usr/bin/bash MIN_PORT=1 MAX_PORT=65535 PORT=$1 if [ ! $PORT ]; then echo "Usage: $0 " exit 10 fi if [ $PORT -lt $MIN_PORT ] || [ $PORT -gt $MAX_PORT ]; then echo "Port must be a number between $MIN_PORT and $MAX_PORT" exit 11 fi echo "Checking wether port $PORT is open" RESPONSE=$(curl -s -X POST --url https://canyouseeme.org -d port=$PORT) echo $RESPONSE | grep -i "I can see your service on" > /dev/null SUCCESS=$? if [ $SUCCESS -eq 0 ]; then echo "Port $PORT is open" exit 0 else echo "Port $PORT is not open" exit 1 fi