UNIX for Beginners Questions & Answers

netstat -an |grep -w  "LISTEN" |grep -v "127.0.0.1" |awk '{print $4}' > /tmp/q1

sed 's/::/ALL/g' /tmp/q1 > /tmp/q2

for i in $(cat /tmp/q2 |awk -F ":" '{print $2}' |sort |uniq);do


abc=$(netstat -an |grep -w  "ESTABLISHED" |grep -v "127.0.0.1" | awk -v chr="$i" '$4 ~ chr'|awk '{print $5}' |awk -F ":" '{print $1}'|sort |uniq)

echo "$abc"


done

192.168.20.232
192.168.10.114
192.168.10.175
192.168.10.183
192.168.10.7
192.168.10.93
192.168.20.120
192.168.20.154
192.168.20.170

abc=$(netstat -an |grep -w  "ESTABLISHED" |grep -v "127.0.0.1" | awk -v  chr="$i" '$4 !~ chr'|awk '{print $5}' |awk -F ":" '{print $1}'|sort  |uniq)

netstat -an | awk '
/LISTEN/ && ! /127.0.0.1/ {
   gsub("::", "ALL", $0)
   if ($4 ~ ":") { RECV[$2] }
}
/ESTABLISHED/ && ($2 in RECV) {
   gsub(/:.*/,"",$5)
   if (!($5 in FOUND)) {
      print $5
      FOUND[$5]
   }
}'

if (!($5 in FOUND)) {
   print $5
   FOUND[$5]
}