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Port 2937 (pnaconsult-lm)

IANA assigns port 2937 to pnaconsult-lm: PNACONSULT-LM.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
pnaconsult-lm TCP PNACONSULT-LM Theo Nijssen -
pnaconsult-lm UDP PNACONSULT-LM Theo Nijssen -

Check what is listening on port 2937

Linux: is anything listening on TCP 2937?
sudo ss -tlnp 'sport = :2937'
Linux: UDP 2937
sudo ss -ulnp 'sport = :2937'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2937
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2937 '
Windows (Command Prompt)
netstat -ano | findstr :2937
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2937 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2937
From Windows
Test-NetConnection HOST -Port 2937
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2937

Block port 2937 in the firewall

ufw
sudo ufw deny 2937/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2937 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2937 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2937' -Direction Inbound -Protocol TCP -LocalPort 2937 -Action Block
ufw
sudo ufw deny 2937/udp
iptables
sudo iptables -A INPUT -p udp --dport 2937 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2937 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2937' -Direction Inbound -Protocol UDP -LocalPort 2937 -Action Block

Related ports

2935qtp2936otpatch2938sm-pas-12939sm-pas-2

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