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// Other services

Port 5192: AmericaOnline2

Port 5192 is assigned by IANA to aol-2 (AmericaOnline2).

5192

How aol-2 works

Other services
client:5192aol-2response client:5192aol-2response

The client sends a request to port 5192 and the aol-2 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 5192 dangerous?

We have no specific security note for port 5192. 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 5192

ServicePortTransportDescriptionReferenceUpdated
aol-2 5192 TCP, UDP AmericaOnline2 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 5192, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5192'      # process listening on 5192
sudo lsof -nP -i :5192

macOS

sudo lsof -nP -i :5192

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5192 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5192
netstat -ano | findstr :5192

From another machine

nmap -p 5192 -sV <host>
sudo nmap -sU -p 5192 <host>
nc -zv <host> 5192

Block it in the firewall

sudo ufw deny 5192/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5192" -Direction Inbound -LocalPort 5192 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5192 used for?

Port 5192 is assigned by IANA to aol-2 (AmericaOnline2).

Is port 5192 TCP or UDP?

Port 5192 is registered for TCP and UDP.

Is it safe to open port 5192?

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 5192 is open?

On Linux run "ss -ltnup 'sport = :5192'", on macOS "lsof -nP -i :5192", and on Windows "netstat -ano | findstr :5192" to see the local process. From another machine, "nmap -p 5192 <host>" shows whether it is reachable.

05 Related
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