with tcpdump you can monitor IP packages, UDP packages, ICMP (ping).

zypper install tcpdump; # comes preinstalled in suse12
apt-get install tcpdump; # debian8
yum install tcpdump; # centos7 redhat

tcpdump -i eth0
tcpdump -vnni eth0; # very verbose

root@Debian8:~# tcpdump -vi eth0|grep 192.168; # filter for source IP
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes

    192.168.1.100 > aviate.yahoo.com: ICMP echo request, id 8548, seq 1, length 64
    192.168.1.100 > aviate.yahoo.com: ICMP echo request, id 8548, seq 1, length 64
    192.168.1.100 > aviate.yahoo.com: ICMP echo request, id 8548, seq 3, length 64
...

Links:

https://www.tecmint.com/12-tcpdump-commands-a-network-sniffer-tool/

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