awk Statistics Connection Status

1. Identify the maximum number of IP connections with a connection status of establish and seal it off.

# netstat-antlp|grep ' estab ' |awk ' {print $ {} ' |awk-f: ' {print '} ' |sort |uniq-c|sort-rn-k 1

2. Count the number of IP connections with establish connection status

# netstat-antlp|grep ' estab ' |awk ' {print $ {} ' |awk-f: ' {print '} ' |sort |uniq-c|sort-rn

3. Identify the IP with the most Syn_rec connection status and seal it off.

# netstat-antlp|grep ' Syn_rec ' |awk ' {print $ {} ' |awk-f: ' {print '} ' |sort |uniq-c|sort-rn-k 1

4. Count the number of IP connections with Syn_rec connection status

# netstat-antlp|grep ' Syn_rec ' |awk ' {print $ {} ' |awk-f: ' {print '} ' |sort |uniq-c|sort-rn

Normally this value is small, preferably less than 5

5. Count connections for TCP connection status

# NETSTAT-ANTLP |awk '/^tcp/{s[$NF]++}end{for (A in S) print A,s[a]} '

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awk Statistics Connection Status