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Port 662 (pftp)

IANA assigns port 662 to pftp: PFTP.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
pftp TCP PFTP Ben Schluricke -
pftp UDP PFTP Ben Schluricke -

Check what is listening on port 662

Linux: is anything listening on TCP 662?
sudo ss -tlnp 'sport = :662'
Linux: UDP 662
sudo ss -ulnp 'sport = :662'
Linux / macOS: which process owns the port
sudo lsof -nP -i :662
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':662 '
Windows (Command Prompt)
netstat -ano | findstr :662
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 662 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 662
From Windows
Test-NetConnection HOST -Port 662
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 662

Block port 662 in the firewall

ufw
sudo ufw deny 662/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 662 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 662 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 662' -Direction Inbound -Protocol TCP -LocalPort 662 -Action Block
ufw
sudo ufw deny 662/udp
iptables
sudo iptables -A INPUT -p udp --dport 662 -j DROP
nftables
sudo nft add rule inet filter input udp dport 662 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 662' -Direction Inbound -Protocol UDP -LocalPort 662 -Action Block

Related ports

660mac-srvr-admin661hap663purenoise664oob-ws-https, asf-secure-rmcp

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