- 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.
Port 4733: RES Orchestration Catalog Services
Port 4733 is assigned by IANA to resorcs (RES Orchestration Catalog Services).
4733
How resorcs works
Other servicesThe client sends a request to port 4733 and the resorcs 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
Is port 4733 dangerous?
We have no specific security note for port 4733. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 4733
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| resorcs | 4733 | TCP | RES Orchestration Catalog Services | - | 2009-11-18 |
| - | 4733 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 4733, and is it reachable?
Linux
sudo ss -ltnup 'sport = :4733' # process listening on 4733
sudo lsof -nP -i :4733macOS
sudo lsof -nP -i :4733
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4733 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 4733 netstat -ano | findstr :4733
From another machine
nmap -p 4733 -sV <host> nc -zv <host> 4733
Block it in the firewall
sudo ufw deny 4733/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 4733" -Direction Inbound -LocalPort 4733 -Protocol TCP -Action Block # Windows
What is port 4733 used for?
Port 4733 is assigned by IANA to resorcs (RES Orchestration Catalog Services).
Is port 4733 TCP or UDP?
Port 4733 is registered for TCP.
Is it safe to open port 4733?
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 4733 is open?
On Linux run "ss -ltnup 'sport = :4733'", on macOS "lsof -nP -i :4733", and on Windows "netstat -ano | findstr :4733" to see the local process. From another machine, "nmap -p 4733 <host>" shows whether it is reachable.
Other other services ports
: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