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Port 479 (iafserver)

IANA assigns port 479 to iafserver.

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

IANA assignment

Service nameProtoDescriptionAssigneeReference
iafserver TCP iafserver - -
iafserver UDP iafserver - -

Check what is listening on port 479

Linux: is anything listening on TCP 479?
sudo ss -tlnp 'sport = :479'
Linux: UDP 479
sudo ss -ulnp 'sport = :479'
Linux / macOS: which process owns the port
sudo lsof -nP -i :479
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':479 '
Windows (Command Prompt)
netstat -ano | findstr :479
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 479 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 479
From Windows
Test-NetConnection HOST -Port 479
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 479

Block port 479 in the firewall

ufw
sudo ufw deny 479/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 479 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 479 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 479' -Direction Inbound -Protocol TCP -LocalPort 479 -Action Block
ufw
sudo ufw deny 479/udp
iptables
sudo iptables -A INPUT -p udp --dport 479 -j DROP
nftables
sudo nft add rule inet filter input udp dport 479 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 479' -Direction Inbound -Protocol UDP -LocalPort 479 -Action Block

Related ports

477ss7ns478spsc480iafdbase481ph

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