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// Other services

Port 5190: America-Online

Port 5190 is assigned by IANA to aol (America-Online).

5190

How aol works

Other services
client:5190aolresponse client:5190aolresponse

The client sends a request to port 5190 and the aol 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 5190 dangerous?

We have no specific security note for port 5190. 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 5190

ServicePortTransportDescriptionReferenceUpdated
aol 5190 TCP, UDP America-Online - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 5190, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5190'      # process listening on 5190
sudo lsof -nP -i :5190

macOS

sudo lsof -nP -i :5190

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5190 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5190
netstat -ano | findstr :5190

From another machine

nmap -p 5190 -sV <host>
sudo nmap -sU -p 5190 <host>
nc -zv <host> 5190

Block it in the firewall

sudo ufw deny 5190/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5190" -Direction Inbound -LocalPort 5190 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5190 used for?

Port 5190 is assigned by IANA to aol (America-Online).

Is port 5190 TCP or UDP?

Port 5190 is registered for TCP and UDP.

Is it safe to open port 5190?

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 5190 is open?

On Linux run "ss -ltnup 'sport = :5190'", on macOS "lsof -nP -i :5190", and on Windows "netstat -ano | findstr :5190" to see the local process. From another machine, "nmap -p 5190 <host>" shows whether it is reachable.

05 Related
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