CyberHunter
LinkedIn profile - Bastien Cordier Email: contact@bastiencordier.pro
// Other services

Port 45045: Remote application control protocol

Port 45045 is assigned by IANA to synctest (Remote application control protocol).

45045

How synctest works

Other services
client:45045synctestresponse client:45045synctestresponse

The client sends a request to port 45045 and the synctest service answers.

Transport
TCP
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 45045 dangerous?

We have no specific security note for port 45045. 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 45045

ServicePortTransportDescriptionReferenceUpdated
synctest 45045 TCP Remote application control protocol - 2013-04-08
-45045-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 45045, and is it reachable?

Linux

sudo ss -ltnup 'sport = :45045'      # process listening on 45045
sudo lsof -nP -i :45045

macOS

sudo lsof -nP -i :45045

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 45045 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 45045
netstat -ano | findstr :45045

From another machine

nmap -p 45045 -sV <host>
nc -zv <host> 45045

Block it in the firewall

sudo ufw deny 45045/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 45045" -Direction Inbound -LocalPort 45045 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 45045 used for?

Port 45045 is assigned by IANA to synctest (Remote application control protocol).

Is port 45045 TCP or UDP?

Port 45045 is registered for TCP.

Is it safe to open port 45045?

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 45045 is open?

On Linux run "ss -ltnup 'sport = :45045'", on macOS "lsof -nP -i :45045", and on Windows "netstat -ano | findstr :45045" to see the local process. From another machine, "nmap -p 45045 <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

Latest vulnerability news

All news