A script that calculates the top 10 source and destination addresses in Netfilter's connection tracking table for UDP and TCP.
$ conntrack_top
Connection count: 3801
Connections max: 296608
Top TCP
Source Num Destination Num
192.168.1.46 207 192.168.1.30 967
85.220.x.x 75 91.192.x.x 963
192.168.1.30 40 192.168.1.196 209
93.179.x.x 32 192.168.1.21 16
86.152.x.x 32 77.109.x.x 14
17.120.x.x 31 192.168.1.46 12
192.168.1.196 31 14.192.x.x 8
157.157.x.x 27 194.144.x.x 8
212.30.x.x 24 192.168.1.138 7
192.168.1.72 23 192.168.1.81 7
Top UDP
Source Num Destination Num
69.122.x.x 164 192.168.1.55 283
192.168.1.63 140 12.122.x.x 282
192.168.1.30 31 47.201.x.x 183
192.168.1.72 23 192.168.1.72 144
37.189.x.x 9 192.168.1.1 46
192.168.1.46 9 192.168.1.63 38
192.168.1.208 6 188.51.x.x 8
192.168.1.196 5 31.172.x.x 4
174.55.x.x 4 81.229.x.x 3
189.47.x.x 4 87.122.x.x 3
$
Simplified BSD. See the LICENSE file for further information.