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Port 3633 (wacp)

IANA assigns port 3633 to wacp: Wyrnix AIS port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
wacp TCP Wyrnix AIS port Harry T Vennik -
wacp UDP Wyrnix AIS port Harry T Vennik -

Registry dates for this port: registered 2002-11.

Check what is listening on port 3633

Linux: is anything listening on TCP 3633?
sudo ss -tlnp 'sport = :3633'
Linux: UDP 3633
sudo ss -ulnp 'sport = :3633'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3633
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3633 '
Windows (Command Prompt)
netstat -ano | findstr :3633
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3633 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3633
From Windows
Test-NetConnection HOST -Port 3633
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3633

Block port 3633 in the firewall

ufw
sudo ufw deny 3633/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3633 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3633 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3633' -Direction Inbound -Protocol TCP -LocalPort 3633 -Action Block
ufw
sudo ufw deny 3633/udp
iptables
sudo iptables -A INPUT -p udp --dport 3633 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3633 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3633' -Direction Inbound -Protocol UDP -LocalPort 3633 -Action Block

Related ports

3631cs-services3632distcc3634hlibmgr3635sdo

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