CyberHunter
Local dataset, no network
// Other services

Port 8122: Apollo Admin Port

Port 8122 is assigned by IANA to apollo-admin (Apollo Admin Port).

8122

How apollo-admin works

Other services
client:8122apollo-adminresponse client:8122apollo-adminresponse

The client sends a request to port 8122 and the apollo-admin 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 8122 dangerous?

We have no specific security note for port 8122. 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 8122

ServicePortTransportDescriptionReferenceUpdated
apollo-admin 8122 TCP, UDP Apollo Admin Port - 2003-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 8122, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8122'      # process listening on 8122
sudo lsof -nP -i :8122

macOS

sudo lsof -nP -i :8122

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8122 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8122
netstat -ano | findstr :8122

From another machine

nmap -p 8122 -sV <host>
sudo nmap -sU -p 8122 <host>
nc -zv <host> 8122

Block it in the firewall

sudo ufw deny 8122/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8122" -Direction Inbound -LocalPort 8122 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8122 used for?

Port 8122 is assigned by IANA to apollo-admin (Apollo Admin Port).

Is port 8122 TCP or UDP?

Port 8122 is registered for TCP and UDP.

Is it safe to open port 8122?

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 8122 is open?

On Linux run "ss -ltnup 'sport = :8122'", on macOS "lsof -nP -i :8122", and on Windows "netstat -ano | findstr :8122" to see the local process. From another machine, "nmap -p 8122 <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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