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Port 3892 (pcc-image-port)

IANA assigns port 3892 to pcc-image-port: PCC-image-port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
pcc-image-port TCP PCC-image-port Shiro Tamoto -
pcc-image-port UDP PCC-image-port Shiro Tamoto -

Registry dates for this port: registered 2003-10.

Check what is listening on port 3892

Linux: is anything listening on TCP 3892?
sudo ss -tlnp 'sport = :3892'
Linux: UDP 3892
sudo ss -ulnp 'sport = :3892'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3892
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3892 '
Windows (Command Prompt)
netstat -ano | findstr :3892
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3892 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3892
From Windows
Test-NetConnection HOST -Port 3892
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3892

Block port 3892 in the firewall

ufw
sudo ufw deny 3892/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3892 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3892 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3892' -Direction Inbound -Protocol TCP -LocalPort 3892 -Action Block
ufw
sudo ufw deny 3892/udp
iptables
sudo iptables -A INPUT -p udp --dport 3892 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3892 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3892' -Direction Inbound -Protocol UDP -LocalPort 3892 -Action Block

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