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Port 560 (rmonitor)

IANA assigns port 560 to rmonitor: rmonitord.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
rmonitor TCP rmonitord - -
rmonitor UDP rmonitord - -

Check what is listening on port 560

Linux: is anything listening on TCP 560?
sudo ss -tlnp 'sport = :560'
Linux: UDP 560
sudo ss -ulnp 'sport = :560'
Linux / macOS: which process owns the port
sudo lsof -nP -i :560
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':560 '
Windows (Command Prompt)
netstat -ano | findstr :560
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 560 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 560
From Windows
Test-NetConnection HOST -Port 560
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 560

Block port 560 in the firewall

ufw
sudo ufw deny 560/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 560 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 560 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 560' -Direction Inbound -Protocol TCP -LocalPort 560 -Action Block
ufw
sudo ufw deny 560/udp
iptables
sudo iptables -A INPUT -p udp --dport 560 -j DROP
nftables
sudo nft add rule inet filter input udp dport 560 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 560' -Direction Inbound -Protocol UDP -LocalPort 560 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.