HTTPfy

Port 44321 (pmcd)

IANA assigns port 44321 to pmcd: PCP server (pmcd).

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
pmcd TCP PCP server (pmcd) Performance Co-Pilot PCP Project -
pmcd UDP PCP server (pmcd) Performance Co-Pilot PCP Project -

Registry dates for this port: registered 2010-12-20, last modified 2025-09-29.

Check what is listening on port 44321

Linux: is anything listening on TCP 44321?
sudo ss -tlnp 'sport = :44321'
Linux: UDP 44321
sudo ss -ulnp 'sport = :44321'
Linux / macOS: which process owns the port
sudo lsof -nP -i :44321
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':44321 '
Windows (Command Prompt)
netstat -ano | findstr :44321
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 44321 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 44321
From Windows
Test-NetConnection HOST -Port 44321
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 44321

Block port 44321 in the firewall

ufw
sudo ufw deny 44321/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 44321 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 44321 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 44321' -Direction Inbound -Protocol TCP -LocalPort 44321 -Action Block
ufw
sudo ufw deny 44321/udp
iptables
sudo iptables -A INPUT -p udp --dport 44321 -j DROP
nftables
sudo nft add rule inet filter input udp dport 44321 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 44321' -Direction Inbound -Protocol UDP -LocalPort 44321 -Action Block

Related ports

43441ciscocsdb44123z-wave-tunnel44322pmproxy44323pmwebapi

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