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Port 4488 (awacs-ice)

IANA assigns port 4488 to awacs-ice: Apple Wide Area Connectivity Service ICE Bootstrap.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
awacs-ice TCP Apple Wide Area Connectivity Service ICE Bootstrap Rory McGuire -
awacs-ice UDP Apple Wide Area Connectivity Service ICE Bootstrap Rory McGuire -

Registry dates for this port: registered 2010-09-24.

Check what is listening on port 4488

Linux: is anything listening on TCP 4488?
sudo ss -tlnp 'sport = :4488'
Linux: UDP 4488
sudo ss -ulnp 'sport = :4488'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4488
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4488 '
Windows (Command Prompt)
netstat -ano | findstr :4488
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4488 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4488
From Windows
Test-NetConnection HOST -Port 4488
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4488

Block port 4488 in the firewall

ufw
sudo ufw deny 4488/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4488 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4488 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4488' -Direction Inbound -Protocol TCP -LocalPort 4488 -Action Block
ufw
sudo ufw deny 4488/udp
iptables
sudo iptables -A INPUT -p udp --dport 4488 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4488 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4488' -Direction Inbound -Protocol UDP -LocalPort 4488 -Action Block

Related ports

4486icms4487prex-tcp4500IPsec NAT traversal4502a25-fap-fgw

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