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Port 2541 (lonworks2)

IANA assigns port 2541 to lonworks2: LonWorks2.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
lonworks2 TCP LonWorks2 Gary Bartlett -
lonworks2 UDP LonWorks2 Gary Bartlett -

Check what is listening on port 2541

Linux: is anything listening on TCP 2541?
sudo ss -tlnp 'sport = :2541'
Linux: UDP 2541
sudo ss -ulnp 'sport = :2541'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2541
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2541 '
Windows (Command Prompt)
netstat -ano | findstr :2541
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2541 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2541
From Windows
Test-NetConnection HOST -Port 2541
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2541

Block port 2541 in the firewall

ufw
sudo ufw deny 2541/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2541 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2541 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2541' -Direction Inbound -Protocol TCP -LocalPort 2541 -Action Block
ufw
sudo ufw deny 2541/udp
iptables
sudo iptables -A INPUT -p udp --dport 2541 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2541 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2541' -Direction Inbound -Protocol UDP -LocalPort 2541 -Action Block

Related ports

2539vsiadmin2540lonworks2542udrawgraph2543reftek

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