Why is ntp listening on IP address 127.0.31.1

[James B. Byrne]

I have a FreeBSD Bhyve guest that has in its /etc/rc.conf file the
following:

. . .
cloned_interfaces="lo1 lo2"
ipv4_addrs_lo1="127.0.31.1/32"
ipv4_addrs_lo2="127.0.32.1/32"
. . .

On the same host I have /etc/ntp.conf configured to listen on specific
addresses:

interface ignore wildcard
interface listen 127.0.0.1
interface listen 192.168.216.18

But following a reboot I discovered this using netstat:

udp4       0      0 127.0.0.1.123          *.*
udp4       0      0 127.0.31.1.123         *.*
udp4       0      0 127.0.32.1.123         *.*
udp4       0      0 192.168.216.18.123     *.*
udp4       0      0 216.185.71.18.123      *.*

Why is ntpd listening on the cloned loopback interfaces?


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James B. Byrne                mailto:ByrneJB at Harte-Lyne.ca
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