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Port 2444 (btpp2sectrans)

IANA assigns port 2444 to btpp2sectrans: BT PP2 Sectrans.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
btpp2sectrans TCP BT PP2 Sectrans Ian Daniels -
btpp2sectrans UDP BT PP2 Sectrans Ian Daniels -

Check what is listening on port 2444

Linux: is anything listening on TCP 2444?
sudo ss -tlnp 'sport = :2444'
Linux: UDP 2444
sudo ss -ulnp 'sport = :2444'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2444
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2444 '
Windows (Command Prompt)
netstat -ano | findstr :2444
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2444 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2444
From Windows
Test-NetConnection HOST -Port 2444
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2444

Block port 2444 in the firewall

ufw
sudo ufw deny 2444/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2444 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2444 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2444' -Direction Inbound -Protocol TCP -LocalPort 2444 -Action Block
ufw
sudo ufw deny 2444/udp
iptables
sudo iptables -A INPUT -p udp --dport 2444 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2444 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2444' -Direction Inbound -Protocol UDP -LocalPort 2444 -Action Block

Related ports

2442netangel2443powerclientcsf2445dtn12446bues-service, bues_service

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