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Port 3683 (bmc-ea)

IANA assigns port 3683 to bmc-ea: BMC EDV/EA.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
bmc-ea TCP BMC EDV/EA Portnoy Boxman -
bmc-ea UDP BMC EDV/EA Portnoy Boxman -

Registry dates for this port: registered 2003-01.

Check what is listening on port 3683

Linux: is anything listening on TCP 3683?
sudo ss -tlnp 'sport = :3683'
Linux: UDP 3683
sudo ss -ulnp 'sport = :3683'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3683
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3683 '
Windows (Command Prompt)
netstat -ano | findstr :3683
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3683 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3683
From Windows
Test-NetConnection HOST -Port 3683
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3683

Block port 3683 in the firewall

ufw
sudo ufw deny 3683/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3683 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3683 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3683' -Direction Inbound -Protocol TCP -LocalPort 3683 -Action Block
ufw
sudo ufw deny 3683/udp
iptables
sudo iptables -A INPUT -p udp --dport 3683 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3683 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3683' -Direction Inbound -Protocol UDP -LocalPort 3683 -Action Block

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