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Port 369 (rpc2portmap)

IANA assigns port 369 to rpc2portmap.

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

IANA assignment

Service nameProtoDescriptionAssigneeReference
rpc2portmap TCP rpc2portmap - -
rpc2portmap UDP rpc2portmap - -

Check what is listening on port 369

Linux: is anything listening on TCP 369?
sudo ss -tlnp 'sport = :369'
Linux: UDP 369
sudo ss -ulnp 'sport = :369'
Linux / macOS: which process owns the port
sudo lsof -nP -i :369
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':369 '
Windows (Command Prompt)
netstat -ano | findstr :369
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 369 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 369
From Windows
Test-NetConnection HOST -Port 369
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 369

Block port 369 in the firewall

ufw
sudo ufw deny 369/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 369 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 369 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 369' -Direction Inbound -Protocol TCP -LocalPort 369 -Action Block
ufw
sudo ufw deny 369/udp
iptables
sudo iptables -A INPUT -p udp --dport 369 -j DROP
nftables
sudo nft add rule inet filter input udp dport 369 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 369' -Direction Inbound -Protocol UDP -LocalPort 369 -Action Block

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