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Port 2124 (elatelink)

IANA assigns port 2124 to elatelink: ELATELINK.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
elatelink TCP ELATELINK Tim Lawrence -
elatelink UDP ELATELINK Tim Lawrence -

Check what is listening on port 2124

Linux: is anything listening on TCP 2124?
sudo ss -tlnp 'sport = :2124'
Linux: UDP 2124
sudo ss -ulnp 'sport = :2124'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2124
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2124 '
Windows (Command Prompt)
netstat -ano | findstr :2124
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2124 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2124
From Windows
Test-NetConnection HOST -Port 2124
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2124

Block port 2124 in the firewall

ufw
sudo ufw deny 2124/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2124 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2124 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2124' -Direction Inbound -Protocol TCP -LocalPort 2124 -Action Block
ufw
sudo ufw deny 2124/udp
iptables
sudo iptables -A INPUT -p udp --dport 2124 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2124 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2124' -Direction Inbound -Protocol UDP -LocalPort 2124 -Action Block

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2122caupc-remote2123gtp-control2125lockstep2126pktcable-cops

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