Port 2373 (remographlm)

IANA assigns port 2373 to remographlm: Remograph License Manager.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference

remographlm TCP Remograph License Manager Per Fahlberg -

Registry dates for this port: registered 2009-01-21.

Linux: is anything listening on TCP 2373?

sudo ss -tlnp 'sport = :2373'

Linux / macOS: which process owns the port

sudo lsof -nP -i :2373

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':2373 '

Windows (Command Prompt)

netstat -ano | findstr :2373

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2373 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 2373

From Windows

Test-NetConnection HOST -Port 2373

ufw

sudo ufw deny 2373/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 2373 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 2373 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 2373' -Direction Inbound -Protocol TCP -LocalPort 2373 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.