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Port 3732 (m-wnn)

IANA assigns port 3732 to m-wnn: Mobile Wnn.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
m-wnn TCP Mobile Wnn Yasunari Yamashita -
m-wnn UDP Mobile Wnn Yasunari Yamashita -

Registry dates for this port: registered 2003-04.

Check what is listening on port 3732

Linux: is anything listening on TCP 3732?
sudo ss -tlnp 'sport = :3732'
Linux: UDP 3732
sudo ss -ulnp 'sport = :3732'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3732
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3732 '
Windows (Command Prompt)
netstat -ano | findstr :3732
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3732 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3732
From Windows
Test-NetConnection HOST -Port 3732
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3732

Block port 3732 in the firewall

ufw
sudo ufw deny 3732/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3732 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3732 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3732' -Direction Inbound -Protocol TCP -LocalPort 3732 -Action Block
ufw
sudo ufw deny 3732/udp
iptables
sudo iptables -A INPUT -p udp --dport 3732 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3732 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3732' -Direction Inbound -Protocol UDP -LocalPort 3732 -Action Block

Related ports

3730client-ctrl3731smap3733multip-msg3734synel-data

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