HTTPfy

Port 486 (avian)

IANA assigns port 486 to avian.

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

IANA assignment

Service nameProtoDescriptionAssigneeReference
avian TCP avian Robert Ullmann 2 -
avian UDP avian Robert Ullmann 2 -

Check what is listening on port 486

Linux: is anything listening on TCP 486?
sudo ss -tlnp 'sport = :486'
Linux: UDP 486
sudo ss -ulnp 'sport = :486'
Linux / macOS: which process owns the port
sudo lsof -nP -i :486
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':486 '
Windows (Command Prompt)
netstat -ano | findstr :486
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 486 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 486
From Windows
Test-NetConnection HOST -Port 486
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 486

Block port 486 in the firewall

ufw
sudo ufw deny 486/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 486 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 486 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 486' -Direction Inbound -Protocol TCP -LocalPort 486 -Action Block
ufw
sudo ufw deny 486/udp
iptables
sudo iptables -A INPUT -p udp --dport 486 -j DROP
nftables
sudo nft add rule inet filter input udp dport 486 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 486' -Direction Inbound -Protocol UDP -LocalPort 486 -Action Block

Related ports

484integra-sme485powerburst487saft488gss-http

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