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// Other services

Port 5105: Hughes Association Protocol

Port 5105 is assigned by IANA to hughes-ap (Hughes Association Protocol).

5105

How hughes-ap works

Other services
client:5105hughes-apresponse client:5105hughes-apresponse

The client sends a request to port 5105 and the hughes-ap service answers.

Transport
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 5105 dangerous?

We have no specific security note for port 5105. 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 5105

ServicePortTransportDescriptionReferenceUpdated
hughes-ap 5105 UDP Hughes Association Protocol - 2010-10-20
-5105-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 5105, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5105'      # process listening on 5105
sudo lsof -nP -i :5105

macOS

sudo lsof -nP -i :5105

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5105 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5105
netstat -ano | findstr :5105

From another machine

nmap -p 5105 -sV <host>
sudo nmap -sU -p 5105 <host>
nc -zv <host> 5105

Block it in the firewall

sudo ufw deny 5105/udp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5105" -Direction Inbound -LocalPort 5105 -Protocol UDP -Action Block  # Windows
04 FAQ
What is port 5105 used for?

Port 5105 is assigned by IANA to hughes-ap (Hughes Association Protocol).

Is port 5105 TCP or UDP?

Port 5105 is registered for UDP.

Is it safe to open port 5105?

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 5105 is open?

On Linux run "ss -ltnup 'sport = :5105'", on macOS "lsof -nP -i :5105", and on Windows "netstat -ano | findstr :5105" to see the local process. From another machine, "nmap -p 5105 <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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