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Port 7101 (elcn)

IANA assigns port 7101 to elcn: Embedded Light Control Network.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
elcn TCP Embedded Light Control Network Michael Scarito -
elcn UDP Embedded Light Control Network Michael Scarito -

Registry dates for this port: registered 2007-02.

Check what is listening on port 7101

Linux: is anything listening on TCP 7101?
sudo ss -tlnp 'sport = :7101'
Linux: UDP 7101
sudo ss -ulnp 'sport = :7101'
Linux / macOS: which process owns the port
sudo lsof -nP -i :7101
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':7101 '
Windows (Command Prompt)
netstat -ano | findstr :7101
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 7101 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 7101
From Windows
Test-NetConnection HOST -Port 7101
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 7101

Block port 7101 in the firewall

ufw
sudo ufw deny 7101/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 7101 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 7101 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 7101' -Direction Inbound -Protocol TCP -LocalPort 7101 -Action Block
ufw
sudo ufw deny 7101/udp
iptables
sudo iptables -A INPUT -p udp --dport 7101 -j DROP
nftables
sudo nft add rule inet filter input udp dport 7101 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 7101' -Direction Inbound -Protocol UDP -LocalPort 7101 -Action Block

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