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// Other services

Port 1559: web2host

Port 1559 is assigned by IANA to web2host (web2host).

1559

How web2host works

Other services
client:1559web2hostresponse client:1559web2hostresponse

The client sends a request to port 1559 and the web2host service answers.

Transport
TCP · UDP
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 1559 dangerous?

We have no specific security note for port 1559. 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 1559

ServicePortTransportDescriptionReferenceUpdated
web2host 1559 TCP, UDP web2host - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1559, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1559'      # process listening on 1559
sudo lsof -nP -i :1559

macOS

sudo lsof -nP -i :1559

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1559 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1559
netstat -ano | findstr :1559

From another machine

nmap -p 1559 -sV <host>
sudo nmap -sU -p 1559 <host>
nc -zv <host> 1559

Block it in the firewall

sudo ufw deny 1559/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1559" -Direction Inbound -LocalPort 1559 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1559 used for?

Port 1559 is assigned by IANA to web2host (web2host).

Is port 1559 TCP or UDP?

Port 1559 is registered for TCP and UDP.

Is it safe to open port 1559?

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 1559 is open?

On Linux run "ss -ltnup 'sport = :1559'", on macOS "lsof -nP -i :1559", and on Windows "netstat -ano | findstr :1559" to see the local process. From another machine, "nmap -p 1559 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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