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Port 2473 (aker-cdp)

IANA assigns port 2473 to aker-cdp: Aker-cdp.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
aker-cdp TCP Aker-cdp Rodrigo Ormonde -
aker-cdp UDP Aker-cdp Rodrigo Ormonde -

Check what is listening on port 2473

Linux: is anything listening on TCP 2473?
sudo ss -tlnp 'sport = :2473'
Linux: UDP 2473
sudo ss -ulnp 'sport = :2473'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2473
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2473 '
Windows (Command Prompt)
netstat -ano | findstr :2473
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2473 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2473
From Windows
Test-NetConnection HOST -Port 2473
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2473

Block port 2473 in the firewall

ufw
sudo ufw deny 2473/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2473 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2473 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2473' -Direction Inbound -Protocol TCP -LocalPort 2473 -Action Block
ufw
sudo ufw deny 2473/udp
iptables
sudo iptables -A INPUT -p udp --dport 2473 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2473 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2473' -Direction Inbound -Protocol UDP -LocalPort 2473 -Action Block

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