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Port 2942 (sm-pas-5)

IANA assigns port 2942 to sm-pas-5: SM-PAS-5.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
sm-pas-5 TCP SM-PAS-5 Tom Haapanen -
sm-pas-5 UDP SM-PAS-5 Tom Haapanen -

Check what is listening on port 2942

Linux: is anything listening on TCP 2942?
sudo ss -tlnp 'sport = :2942'
Linux: UDP 2942
sudo ss -ulnp 'sport = :2942'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2942
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2942 '
Windows (Command Prompt)
netstat -ano | findstr :2942
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2942 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2942
From Windows
Test-NetConnection HOST -Port 2942
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2942

Block port 2942 in the firewall

ufw
sudo ufw deny 2942/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2942 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2942 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2942' -Direction Inbound -Protocol TCP -LocalPort 2942 -Action Block
ufw
sudo ufw deny 2942/udp
iptables
sudo iptables -A INPUT -p udp --dport 2942 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2942 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2942' -Direction Inbound -Protocol UDP -LocalPort 2942 -Action Block

Related ports

2940sm-pas-32941sm-pas-42943ttnrepository2944megaco-h248

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