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Port 17756 (zigbee-ips)

IANA assigns port 17756 to zigbee-ips: ZigBee IP Transport Secure Service.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
zigbee-ips TCP ZigBee IP Transport Secure Service Chris Herzog -
zigbee-ips UDP ZigBee IP Transport Secure Service Chris Herzog -

Registry dates for this port: registered 2006-05.

Check what is listening on port 17756

Linux: is anything listening on TCP 17756?
sudo ss -tlnp 'sport = :17756'
Linux: UDP 17756
sudo ss -ulnp 'sport = :17756'
Linux / macOS: which process owns the port
sudo lsof -nP -i :17756
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':17756 '
Windows (Command Prompt)
netstat -ano | findstr :17756
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 17756 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 17756
From Windows
Test-NetConnection HOST -Port 17756
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 17756

Block port 17756 in the firewall

ufw
sudo ufw deny 17756/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 17756 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 17756 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 17756' -Direction Inbound -Protocol TCP -LocalPort 17756 -Action Block
ufw
sudo ufw deny 17756/udp
iptables
sudo iptables -A INPUT -p udp --dport 17756 -j DROP
nftables
sudo nft add rule inet filter input udp dport 17756 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 17756' -Direction Inbound -Protocol UDP -LocalPort 17756 -Action Block

Related ports

17754zep17755zigbee-ip17777sw-orion18000biimenu

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