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Port 2972 (pmsm-webrctl)

IANA assigns port 2972 to pmsm-webrctl: PMSM Webrctl.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
pmsm-webrctl TCP PMSM Webrctl Markus Michels -
pmsm-webrctl UDP PMSM Webrctl Markus Michels -

Check what is listening on port 2972

Linux: is anything listening on TCP 2972?
sudo ss -tlnp 'sport = :2972'
Linux: UDP 2972
sudo ss -ulnp 'sport = :2972'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2972
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2972 '
Windows (Command Prompt)
netstat -ano | findstr :2972
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2972 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2972
From Windows
Test-NetConnection HOST -Port 2972
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2972

Block port 2972 in the firewall

ufw
sudo ufw deny 2972/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2972 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2972 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2972' -Direction Inbound -Protocol TCP -LocalPort 2972 -Action Block
ufw
sudo ufw deny 2972/udp
iptables
sudo iptables -A INPUT -p udp --dport 2972 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2972 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2972' -Direction Inbound -Protocol UDP -LocalPort 2972 -Action Block

Related ports

2970index-net2971netclip2973svnetworks2974signal

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