add .env & block_port.sh

scripts/.env

@@ -0,0 +1,2 @@
+OPEN_PORT_SEQ="8100, 7200, 13000"
+CLOSE_PORT_SEQ="6300, 5200, 12001"

scripts/block_port.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+source .env # load vars from .env file
+
+case "${1}" in
+    search )
+        # load container ip in array IPs
+        mapfile IPs < <( nmap 172.28.0.2-10 -sn | grep "ngx" | awk '{print substr($6, 2, length($6)-2)}')
+        # using 'tr' for escape bug with \n in array elements
+        echo "IPs=( $(echo ${IPs[@]} | tr '\n' ' '))" >> .env
+        ;;
+    block )
+        echo "knock -v ${IPs[$2]} $(echo ${CLOSE_PORT_SEQ} | sed 's/,//g')"
+        knock -v ${IPs[$2]} $(echo ${CLOSE_PORT_SEQ} | sed 's/,//g')
+        ;;
+    open )
+        echo "knock -v ${IPs[$2]} $(echo ${OPEN_PORT_SEQ} | sed 's/,//g')"
+        knock -v ${IPs[$2]} $(echo ${OPEN_PORT_SEQ} | sed 's/,//g')
+        ;;
+    list )
+        # print array IPs
+        numb=0 # counter var
+        for ip in "${IPs[@]}"; do
+            echo "${numb}: ${ip}" # add index array element
+            numb=$((${numb}+1))
+        done
+        ;;
+esac
+