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Port 8017 (cisco-cloudsec)

IANA assigns port 8017 to cisco-cloudsec: Cisco Cloudsec Dataplane Port Number.

Registered (user) port, 1024-49151 UDP

Port 8017 is normally used over UDP; the checker tests TCP only, so a "filtered" result does not mean the UDP service is down.

IANA assignment

Service nameProtoDescriptionAssigneeReference
cisco-cloudsec UDP Cisco Cloudsec Dataplane Port Number Cisco Systems Inc -

Registry dates for this port: registered 2021-03-18.

Check what is listening on port 8017

Linux: UDP 8017
sudo ss -ulnp 'sport = :8017'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8017
Windows (Command Prompt)
netstat -ano | findstr :8017
Windows (PowerShell)
Get-NetUDPEndpoint -LocalPort 8017

Test it from outside

UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 8017

Block port 8017 in the firewall

ufw
sudo ufw deny 8017/udp
iptables
sudo iptables -A INPUT -p udp --dport 8017 -j DROP
nftables
sudo nft add rule inet filter input udp dport 8017 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 8017' -Direction Inbound -Protocol UDP -LocalPort 8017 -Action Block

Related ports

8015cfg-cloud8016ads-s8019qbdb8020intu-ec-svcdisc

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