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Port 3649 (nmmp)

IANA assigns port 3649 to nmmp: Nishioka Miyuki Msg Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
nmmp TCP Nishioka Miyuki Msg Protocol TAKEDA Hiroyuki -
nmmp UDP Nishioka Miyuki Msg Protocol TAKEDA Hiroyuki -

Registry dates for this port: registered 2003-01.

Check what is listening on port 3649

Linux: is anything listening on TCP 3649?
sudo ss -tlnp 'sport = :3649'
Linux: UDP 3649
sudo ss -ulnp 'sport = :3649'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3649
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3649 '
Windows (Command Prompt)
netstat -ano | findstr :3649
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3649 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3649
From Windows
Test-NetConnection HOST -Port 3649
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3649

Block port 3649 in the firewall

ufw
sudo ufw deny 3649/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3649 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3649 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3649' -Direction Inbound -Protocol TCP -LocalPort 3649 -Action Block
ufw
sudo ufw deny 3649/udp
iptables
sudo iptables -A INPUT -p udp --dport 3649 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3649 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3649' -Direction Inbound -Protocol UDP -LocalPort 3649 -Action Block

Related ports

3647splitlock-gw3648fjcp3650prismiq-plugin3651xrpc-registry

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.