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Port 3668 (dell-rm-port)

IANA assigns port 3668 to dell-rm-port: Dell Remote Management.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
dell-rm-port TCP Dell Remote Management Bradley Bransom -
dell-rm-port UDP Dell Remote Management Bradley Bransom -

Registry dates for this port: registered 2003-01.

Check what is listening on port 3668

Linux: is anything listening on TCP 3668?
sudo ss -tlnp 'sport = :3668'
Linux: UDP 3668
sudo ss -ulnp 'sport = :3668'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3668
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3668 '
Windows (Command Prompt)
netstat -ano | findstr :3668
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3668 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3668
From Windows
Test-NetConnection HOST -Port 3668
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3668

Block port 3668 in the firewall

ufw
sudo ufw deny 3668/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3668 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3668 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3668' -Direction Inbound -Protocol TCP -LocalPort 3668 -Action Block
ufw
sudo ufw deny 3668/udp
iptables
sudo iptables -A INPUT -p udp --dport 3668 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3668 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3668' -Direction Inbound -Protocol UDP -LocalPort 3668 -Action Block

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