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Port 3829 (neteh-ext)

IANA assigns port 3829 to neteh-ext: Netadmin Systems Event Handler External.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
neteh-ext TCP Netadmin Systems Event Handler External Jonas Krogell -
neteh-ext UDP Netadmin Systems Event Handler External Jonas Krogell -

Registry dates for this port: registered 2007-07-10.

Check what is listening on port 3829

Linux: is anything listening on TCP 3829?
sudo ss -tlnp 'sport = :3829'
Linux: UDP 3829
sudo ss -ulnp 'sport = :3829'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3829
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3829 '
Windows (Command Prompt)
netstat -ano | findstr :3829
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3829 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3829
From Windows
Test-NetConnection HOST -Port 3829
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3829

Block port 3829 in the firewall

ufw
sudo ufw deny 3829/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3829 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3829 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3829' -Direction Inbound -Protocol TCP -LocalPort 3829 -Action Block
ufw
sudo ufw deny 3829/udp
iptables
sudo iptables -A INPUT -p udp --dport 3829 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3829 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3829' -Direction Inbound -Protocol UDP -LocalPort 3829 -Action Block

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