Port 44323 (pmwebapi)

IANA assigns port 44323 to pmwebapi: HTTP binding for Performance Co-Pilot client API.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference

pmwebapi TCP HTTP binding for Performance Co-Pilot client API Performance Co-Pilot PCP Project -

Registry dates for this port: registered 2013-10-09.

Linux: is anything listening on TCP 44323?

sudo ss -tlnp 'sport = :44323'

Linux / macOS: which process owns the port

sudo lsof -nP -i :44323

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':44323 '

Windows (Command Prompt)

netstat -ano | findstr :44323

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 44323 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 44323

From Windows

Test-NetConnection HOST -Port 44323

ufw

sudo ufw deny 44323/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 44323 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 44323 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 44323' -Direction Inbound -Protocol TCP -LocalPort 44323 -Action Block

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