CyberHunter
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// Other services

Port 4870: Citcom Tracking Service

Port 4870 is assigned by IANA to cc-tracking (Citcom Tracking Service).

4870

How cc-tracking works

Other services
client:4870cc-trackingresponse client:4870cc-trackingresponse

The client sends a request to port 4870 and the cc-tracking 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 4870 dangerous?

We have no specific security note for port 4870. 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 4870

ServicePortTransportDescriptionReferenceUpdated
cc-tracking 4870 TCP, UDP Citcom Tracking Service - 2005-12

// source: IANA service name and port number registry

03 Check it

Which program uses port 4870, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4870'      # process listening on 4870
sudo lsof -nP -i :4870

macOS

sudo lsof -nP -i :4870

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4870 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4870
netstat -ano | findstr :4870

From another machine

nmap -p 4870 -sV <host>
sudo nmap -sU -p 4870 <host>
nc -zv <host> 4870

Block it in the firewall

sudo ufw deny 4870/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4870" -Direction Inbound -LocalPort 4870 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4870 used for?

Port 4870 is assigned by IANA to cc-tracking (Citcom Tracking Service).

Is port 4870 TCP or UDP?

Port 4870 is registered for TCP and UDP.

Is it safe to open port 4870?

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 4870 is open?

On Linux run "ss -ltnup 'sport = :4870'", on macOS "lsof -nP -i :4870", and on Windows "netstat -ano | findstr :4870" to see the local process. From another machine, "nmap -p 4870 <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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