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Port 4340 (gaia)

IANA assigns port 4340 to gaia: Gaia Connector Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
gaia TCP Gaia Connector Protocol Philippe Detournay -
gaia UDP Gaia Connector Protocol Philippe Detournay -

Registry dates for this port: registered 2007-11-12.

Check what is listening on port 4340

Linux: is anything listening on TCP 4340?
sudo ss -tlnp 'sport = :4340'
Linux: UDP 4340
sudo ss -ulnp 'sport = :4340'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4340
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4340 '
Windows (Command Prompt)
netstat -ano | findstr :4340
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4340 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4340
From Windows
Test-NetConnection HOST -Port 4340
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4340

Block port 4340 in the firewall

ufw
sudo ufw deny 4340/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4340 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4340 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4340' -Direction Inbound -Protocol TCP -LocalPort 4340 -Action Block
ufw
sudo ufw deny 4340/udp
iptables
sudo iptables -A INPUT -p udp --dport 4340 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4340 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4340' -Direction Inbound -Protocol UDP -LocalPort 4340 -Action Block

Related ports

4335netconf-ch-tls4336restconf-ch-tls4341lisp-data4342lisp-control

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