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Port 3344 (bnt-manager)

IANA assigns port 3344 to bnt-manager: BNT Manager.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
bnt-manager TCP BNT Manager Engineering Dept -
bnt-manager UDP BNT Manager Engineering Dept -

Check what is listening on port 3344

Linux: is anything listening on TCP 3344?
sudo ss -tlnp 'sport = :3344'
Linux: UDP 3344
sudo ss -ulnp 'sport = :3344'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3344
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3344 '
Windows (Command Prompt)
netstat -ano | findstr :3344
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3344 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3344
From Windows
Test-NetConnection HOST -Port 3344
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3344

Block port 3344 in the firewall

ufw
sudo ufw deny 3344/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3344 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3344 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3344' -Direction Inbound -Protocol TCP -LocalPort 3344 -Action Block
ufw
sudo ufw deny 3344/udp
iptables
sudo iptables -A INPUT -p udp --dport 3344 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3344 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3344' -Direction Inbound -Protocol UDP -LocalPort 3344 -Action Block

Related ports

3342webtie3343ms-cluster-net3345influence3346trnsprntproxy

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