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// Other services

Port 5506: Amcom Mobile Connect

Port 5506 is assigned by IANA to amc (Amcom Mobile Connect).

5506

How amc works

Other services
client:5506amcresponse client:5506amcresponse

The client sends a request to port 5506 and the amc 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 5506 dangerous?

We have no specific security note for port 5506. 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 5506

ServicePortTransportDescriptionReferenceUpdated
amc 5506 TCP, UDP Amcom Mobile Connect - 2010-06-03

// source: IANA service name and port number registry

03 Check it

Which program uses port 5506, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5506'      # process listening on 5506
sudo lsof -nP -i :5506

macOS

sudo lsof -nP -i :5506

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5506 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5506
netstat -ano | findstr :5506

From another machine

nmap -p 5506 -sV <host>
sudo nmap -sU -p 5506 <host>
nc -zv <host> 5506

Block it in the firewall

sudo ufw deny 5506/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5506" -Direction Inbound -LocalPort 5506 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5506 used for?

Port 5506 is assigned by IANA to amc (Amcom Mobile Connect).

Is port 5506 TCP or UDP?

Port 5506 is registered for TCP and UDP.

Is it safe to open port 5506?

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 5506 is open?

On Linux run "ss -ltnup 'sport = :5506'", on macOS "lsof -nP -i :5506", and on Windows "netstat -ano | findstr :5506" to see the local process. From another machine, "nmap -p 5506 <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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