No, actually it is *not* configurable (despite it seems it is).
I'm running rpcbind 0.2.3-0.6 (Debian Stretch) with the following config
file:
OPTIONS='-w'
OPTIONS="${OPTIONS} -h 127.0.0.1 -h ::1"
OPTIONS="${OPTIONS} -l"
The rpcbind service is indeed using the above options:
# ps -ef | grep rpcbind | grep -v grep
root 32284 1 0 12:51 ? 00:00:00 /sbin/rpcbind -w -h
127.0.0.1 -h ::1 -l
But still keeps binding to INADDR_ANY:
# nmap -P0 172.23.202.158
Starting Nmap 7.40 ( https://nmap.org ) at 2017-12-22 13:19 MSK
Nmap scan report for 172.23.202.158
Host is up (0.0000020s latency).
Not shown: 998 closed ports
PORT STATE SERVICE
22/tcp open ssh
111/tcp open rpcbind
Nmap done: 1 IP address (1 host up) scanned in 1.67 seconds
