I can confirm this. Unstable (version 2.3.1-1):
zito@bobek:~$ ip a s dev wlp3s0 3: wlp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 00:24:d7:f3:8d:e8 brd ff:ff:ff:ff:ff:ff inet 192.168.1.120/24 brd 192.168.1.255 scope global dynamic noprefixroute wlp3s0 valid_lft 74258sec preferred_lft 74258sec inet6 fe80::d1b4:870a:5e9d:43c7/64 scope link noprefixroute valid_lft forever preferred_lft forever zito@bobek:~$ /usr/lib/nagios/plugins/check_icmp -s 192.168.1.120 192.168.1.120 check_icmp: Cannot bind to IP address 192.168.1.120: Socket operation on non-socket Buster (2.2-6): nms2:~# dpkg -l --no-pager monitoring-plugins-basic Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architecture Description +++-========================-============-============-======================================================== ii monitoring-plugins-basic 2.2-6 amd64 Plugins for nagios compatible monitoring systems (basic) nms2:~# ip a s dev eth0 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 52:54:00:bb:d9:67 brd ff:ff:ff:ff:ff:ff inet 10.0.156.83/24 brd 10.0.156.255 scope global eth0 valid_lft forever preferred_lft forever inet6 fe80::5054:ff:febb:d967/64 scope link valid_lft forever preferred_lft forever nms2:~# /usr/lib/nagios/plugins/check_icmp -s 10.0.156.83 10.0.156.83 OK - 10.0.156.83: rta 0.013ms, lost 0%|rta=0.013ms;200.000;500.000;0; pl=0%;40;80;; rtmax=0.045ms;;;; rtmin=0.005ms;;;; Cheers -- Zito