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Port 2571 (cecsvc)

IANA assigns port 2571 to cecsvc: CECSVC.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
cecsvc TCP CECSVC Roger Pao -
cecsvc UDP CECSVC Roger Pao -

Check what is listening on port 2571

Linux: is anything listening on TCP 2571?
sudo ss -tlnp 'sport = :2571'
Linux: UDP 2571
sudo ss -ulnp 'sport = :2571'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2571
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2571 '
Windows (Command Prompt)
netstat -ano | findstr :2571
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2571 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2571
From Windows
Test-NetConnection HOST -Port 2571
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2571

Block port 2571 in the firewall

ufw
sudo ufw deny 2571/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2571 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2571 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2571' -Direction Inbound -Protocol TCP -LocalPort 2571 -Action Block
ufw
sudo ufw deny 2571/udp
iptables
sudo iptables -A INPUT -p udp --dport 2571 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2571 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2571' -Direction Inbound -Protocol UDP -LocalPort 2571 -Action Block

Related ports

2569sonuscallsig2570hs-port2572ibp2573trustestablish

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