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Port 4942 (eq-office-4942)

IANA assigns port 4942 to eq-office-4942: Equitrac Office.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
eq-office-4942 TCP Equitrac Office Tom Haapanen 2 -
eq-office-4942 UDP Equitrac Office Tom Haapanen 2 -

Registry dates for this port: registered 2007-07-11.

Check what is listening on port 4942

Linux: is anything listening on TCP 4942?
sudo ss -tlnp 'sport = :4942'
Linux: UDP 4942
sudo ss -ulnp 'sport = :4942'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4942
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4942 '
Windows (Command Prompt)
netstat -ano | findstr :4942
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4942 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4942
From Windows
Test-NetConnection HOST -Port 4942
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4942

Block port 4942 in the firewall

ufw
sudo ufw deny 4942/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4942 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4942 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4942' -Direction Inbound -Protocol TCP -LocalPort 4942 -Action Block
ufw
sudo ufw deny 4942/udp
iptables
sudo iptables -A INPUT -p udp --dport 4942 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4942 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4942' -Direction Inbound -Protocol UDP -LocalPort 4942 -Action Block

Related ports

4940eq-office-49404941eq-office-49414949munin4950sybasesrvmon

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