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Port 4002 (pxc-spvr-ft)

IANA assigns port 4002 to pxc-spvr-ft.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
pxc-spvr-ft TCP pxc-spvr-ft - -
pxc-spvr-ft UDP pxc-spvr-ft - -

Check what is listening on port 4002

Linux: is anything listening on TCP 4002?
sudo ss -tlnp 'sport = :4002'
Linux: UDP 4002
sudo ss -ulnp 'sport = :4002'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4002
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4002 '
Windows (Command Prompt)
netstat -ano | findstr :4002
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4002 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4002
From Windows
Test-NetConnection HOST -Port 4002
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4002

Block port 4002 in the firewall

ufw
sudo ufw deny 4002/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4002 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4002 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4002' -Direction Inbound -Protocol TCP -LocalPort 4002 -Action Block
ufw
sudo ufw deny 4002/udp
iptables
sudo iptables -A INPUT -p udp --dport 4002 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4002 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4002' -Direction Inbound -Protocol UDP -LocalPort 4002 -Action Block

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