HTTPfy

Port 82 (xfer)

IANA assigns port 82 to xfer: XFER Utility.

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

IANA assignment

Service nameProtoDescriptionAssigneeReference
xfer TCP XFER Utility Thomas M Smith -
xfer UDP XFER Utility Thomas M Smith -

Check what is listening on port 82

Linux: is anything listening on TCP 82?
sudo ss -tlnp 'sport = :82'
Linux: UDP 82
sudo ss -ulnp 'sport = :82'
Linux / macOS: which process owns the port
sudo lsof -nP -i :82
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':82 '
Windows (Command Prompt)
netstat -ano | findstr :82
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 82 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 82
From Windows
Test-NetConnection HOST -Port 82
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 82

Block port 82 in the firewall

ufw
sudo ufw deny 82/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 82 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 82 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 82' -Direction Inbound -Protocol TCP -LocalPort 82 -Action Block
ufw
sudo ufw deny 82/udp
iptables
sudo iptables -A INPUT -p udp --dport 82 -j DROP
nftables
sudo nft add rule inet filter input udp dport 82 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 82' -Direction Inbound -Protocol UDP -LocalPort 82 -Action Block

Related ports

79finger80HTTP83mit-ml-dev84ctf

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