- Clean up

- More comments added

ufw.awk

@@ -4,11 +4,6 @@
     # Warn on blank log
     # Incorrect timestamp - very old TS or latest TS older than older TS
         # out of order or blocks of time are missing
-# Combine info from "netstat" to determine who is listening on "SRC-PORT" 
-    # Display it on another column - comma separated list of programs
-    # sudo ss -lpn | grep ":53\b" | awk -F "\"" '{programs[$2]=$2} END {for (name in programs) if(names!="")names=names","name; else names=name; print names}'
-    # sudo ss -lpntu | awk -F: 'NR>1&&$1!~"\\["{print $2, $4} NR>1&&$1~"\\["{print $4, $8}' | awk '{print $1, substr($3,index($3, "\"")+1,index($3, ",")-index($3,"\"")-2)}' | sort -nu
-# Display the GEO-location for source & destination IP
 # Combine it with system-log file
 # Give options to process only a certain number of day's log
 # Check if mawk is available -> if yes, use that
@@ -16,7 +11,8 @@
 # Since changing language improves performance
 LC_ALL=C 
 
-
+# Adding the port-program mapping to a shell variable
+# We shall pass it to awk later
 declare port_programs=$(ss -lpntu | 
     awk 'BEGIN {FS=":"} 
          NR>1 && $1 !~ "\\[" {print $2, $NF} # Row does NOT contains [ -> Fetch 2nd and last columns
@@ -43,10 +39,6 @@ declare port_programs=$(ss -lpntu |
                 print port, port_programs[port]
     }')
 
-function getProgramName() {
-    echo port_programs | grep $1
-}
-
 cat /var/log/ufw.log | 
     mawk '
         function GetValue(currentColumnValue, stringToSearch) {
@@ -78,9 +70,10 @@ cat /var/log/ufw.log |
             
             print EVENT, IN, OUT, SRC, DST, SRCPORT, DSTPORT, PROTO
     }' | 
-    sort | uniq -c | sort -rn | column -t | 
+    sort | uniq -c | 
     awk -v port_programs_bash="$port_programs" '
         BEGIN{
+            # Column headers
             printf ("%6s %15s %10s %10s %15s %15s %8s %8s %8s %20s\n", "Count", "Event-Type", "IN-BOUND?", "OUT-BOUND?", "SRC-Addr", "DST-Addr", "SRC-PORT", "DST-PORT", "Protocol", "Port-Listeners")
             print "-----------------------------------------------------------------------------------------------------------------------------"