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Port 3213 (neon24x7)

IANA assigns port 3213 to neon24x7: NEON 24X7 Mission Control.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
neon24x7 TCP NEON 24X7 Mission Control Tony Lubrano -
neon24x7 UDP NEON 24X7 Mission Control Tony Lubrano -

Check what is listening on port 3213

Linux: is anything listening on TCP 3213?
sudo ss -tlnp 'sport = :3213'
Linux: UDP 3213
sudo ss -ulnp 'sport = :3213'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3213
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3213 '
Windows (Command Prompt)
netstat -ano | findstr :3213
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3213 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3213
From Windows
Test-NetConnection HOST -Port 3213
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3213

Block port 3213 in the firewall

ufw
sudo ufw deny 3213/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3213 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3213 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3213' -Direction Inbound -Protocol TCP -LocalPort 3213 -Action Block
ufw
sudo ufw deny 3213/udp
iptables
sudo iptables -A INPUT -p udp --dport 3213 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3213 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3213' -Direction Inbound -Protocol UDP -LocalPort 3213 -Action Block

Related ports

3211avsecuremgmt3212surveyinst3214jmq-daemon-13215jmq-daemon-2

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