CyberHunter
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// Other services

Port 5065: Channel Access 2

Port 5065 is assigned by IANA to ca-2 (Channel Access 2).

5065

How ca-2 works

Other services
client:5065ca-2response client:5065ca-2response

The client sends a request to port 5065 and the ca-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 5065 dangerous?

We have no specific security note for port 5065. 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 5065

ServicePortTransportDescriptionReferenceUpdated
ca-2 5065 TCP, UDP Channel Access 2 - 2002-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 5065, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5065'      # process listening on 5065
sudo lsof -nP -i :5065

macOS

sudo lsof -nP -i :5065

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5065 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5065
netstat -ano | findstr :5065

From another machine

nmap -p 5065 -sV <host>
sudo nmap -sU -p 5065 <host>
nc -zv <host> 5065

Block it in the firewall

sudo ufw deny 5065/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5065" -Direction Inbound -LocalPort 5065 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5065 used for?

Port 5065 is assigned by IANA to ca-2 (Channel Access 2).

Is port 5065 TCP or UDP?

Port 5065 is registered for TCP and UDP.

Is it safe to open port 5065?

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 5065 is open?

On Linux run "ss -ltnup 'sport = :5065'", on macOS "lsof -nP -i :5065", and on Windows "netstat -ano | findstr :5065" to see the local process. From another machine, "nmap -p 5065 <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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