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// Other services

Port 17555: Ailith management of routers

Port 17555 is assigned by IANA to ailith (Ailith management of routers).

17555

How ailith works

Other services
client:17555ailithresponse client:17555ailithresponse

The client sends a request to port 17555 and the ailith service answers.

Transport
TCP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 17555 dangerous?

We have no specific security note for port 17555. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 17555

ServicePortTransportDescriptionReferenceUpdated
ailith 17555 TCP Ailith management of routers - 2014-03-27
-17555-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 17555, and is it reachable?

Linux

sudo ss -ltnup 'sport = :17555'      # process listening on 17555
sudo lsof -nP -i :17555

macOS

sudo lsof -nP -i :17555

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 17555 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 17555
netstat -ano | findstr :17555

From another machine

nmap -p 17555 -sV <host>
nc -zv <host> 17555

Block it in the firewall

sudo ufw deny 17555/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 17555" -Direction Inbound -LocalPort 17555 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 17555 used for?

Port 17555 is assigned by IANA to ailith (Ailith management of routers).

Is port 17555 TCP or UDP?

Port 17555 is registered for TCP.

Is it safe to open port 17555?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 17555 is open?

On Linux run "ss -ltnup 'sport = :17555'", on macOS "lsof -nP -i :17555", and on Windows "netstat -ano | findstr :17555" to see the local process. From another machine, "nmap -p 17555 <host>" shows whether it is reachable.

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