The Portmapper service runs on port 111 tcp/udp

ss -lntp | grep 111

LISTEN 0 128 *:111 *:* users:(("rpcbind",pid=816,fd=8))
LISTEN 0 128 [::]:111 [::]:* users:(("rpcbind",pid=816,fd=11))

pcinfo -p
program vers proto port service
100000 4 tcp 111 portmapper
100000 3 tcp 111 portmapper
100000 2 tcp 111 portmapper
100000 4 udp 111 portmapper
100000 3 udp 111 portmapper
100000 2 udp 111 portmapper

systemctl stop rpcbind.socket
rpcinfo -p
rpcinfo: can't contact portmapper: RPC: Remote system error - Connection refused

systemctl disable rpcbind

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