HTTPfy

Port 8445 (copy, copy-disc)

IANA assigns port 8445 to copy, copy-disc: Port for copy peer sync feature.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
copy TCP Port for copy peer sync feature Copy -
copy-disc UDP Port for copy discovery Copy -

Registry dates for this port: registered 2012-09-19.

Check what is listening on port 8445

Linux: is anything listening on TCP 8445?
sudo ss -tlnp 'sport = :8445'
Linux: UDP 8445
sudo ss -ulnp 'sport = :8445'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8445
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':8445 '
Windows (Command Prompt)
netstat -ano | findstr :8445
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8445 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 8445
From Windows
Test-NetConnection HOST -Port 8445
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 8445

Block port 8445 in the firewall

ufw
sudo ufw deny 8445/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 8445 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 8445 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 8445' -Direction Inbound -Protocol TCP -LocalPort 8445 -Action Block
ufw
sudo ufw deny 8445/udp
iptables
sudo iptables -A INPUT -p udp --dport 8445 -j DROP
nftables
sudo nft add rule inet filter input udp dport 8445 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 8445' -Direction Inbound -Protocol UDP -LocalPort 8445 -Action Block

Related ports

8443HTTPS alternate8444pcsync-http8448matrix-fed8450npmp

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