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Port 4124 (tigv2)

IANA assigns port 4124 to tigv2: Rohill TetraNode Ip Gateway v2.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
tigv2 TCP Rohill TetraNode Ip Gateway v2 Bert Bouwers -
tigv2 UDP Rohill TetraNode Ip Gateway v2 Bert Bouwers -

Registry dates for this port: registered 2007-05.

Check what is listening on port 4124

Linux: is anything listening on TCP 4124?
sudo ss -tlnp 'sport = :4124'
Linux: UDP 4124
sudo ss -ulnp 'sport = :4124'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4124
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4124 '
Windows (Command Prompt)
netstat -ano | findstr :4124
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4124 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4124
From Windows
Test-NetConnection HOST -Port 4124
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4124

Block port 4124 in the firewall

ufw
sudo ufw deny 4124/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4124 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4124 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4124' -Direction Inbound -Protocol TCP -LocalPort 4124 -Action Block
ufw
sudo ufw deny 4124/udp
iptables
sudo iptables -A INPUT -p udp --dport 4124 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4124 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4124' -Direction Inbound -Protocol UDP -LocalPort 4124 -Action Block

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