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Port 17555 (ailith)

IANA assigns port 17555 to ailith: Ailith management of routers.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ailith TCP Ailith management of routers Thomas Boje -

Registry dates for this port: registered 2014-03-27.

Check what is listening on port 17555

Linux: is anything listening on TCP 17555?
sudo ss -tlnp 'sport = :17555'
Linux / macOS: which process owns the port
sudo lsof -nP -i :17555
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':17555 '
Windows (Command Prompt)
netstat -ano | findstr :17555
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 17555 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 17555
From Windows
Test-NetConnection HOST -Port 17555

Block port 17555 in the firewall

ufw
sudo ufw deny 17555/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 17555 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 17555 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 17555' -Direction Inbound -Protocol TCP -LocalPort 17555 -Action Block

Related ports

17235ssh-mgmt17500db-lsp, db-lsp-disc17729ea17754zep

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