# 9100 - Pentesting Raw Printing (JetDirect, AppSocket, PDL-datastream)

## Basic Information

Raw printing is what we define as the process of making a connection to port 9100/tcp of a network printer. It is the default method used by CUPS and the Windows printing architecture to communicate with network printers as it is considered as ‘_the simplest, fastest, and generally the most reliable network protocol used for printers_’. Raw port 9100 printing, also referred to as JetDirect, AppSocket or PDL-datastream actually **is not a printing protocol by itself**. Instead **all data sent is directly processed by the printing device**, just like a parallel connection over TCP. In contrast to LPD, IPP and SMB, this can send direct feedback to the client, including status and error messages. Such a **bidirectional channel** gives us direct **access **to **results **of **PJL**, **PostScript **or **PCL **commands. Therefore raw port 9100 printing – which is supported by almost any network printer – is used as the channel for security analysis with PRET and PFT. (From [here](http://hacking-printers.net/wiki/index.php/Port\_9100\_printing))

If you want to learn more about [**hacking printers read this page**](pentesting-printers/).

**Default port:** 9100

```
9100/tcp open  jetdirect
```

## Enumeration

### Manual

```bash
nc -vn <IP> 9100
@PJL INFO STATUS      #CODE=40000   DISPLAY="Sleep"   ONLINE=TRUE
@PJL INFO ID          # ID (Brand an version): Brother HL-L2360D series:84U-F75:Ver.b.26
@PJL INFO PRODINFO    #Product info
@PJL FSDIRLIST NAME="0:\" ENTRY=1 COUNT=65535  #List dir
@PJL INFO VARIABLES   #Env variales
@PJL INFO FILESYS     #?
@PJL INFO TIMEOUT     #Timeout variables
@PJL RDYMSG           #Ready message
@PJL FSINIT  
@PJL FSDIRLIST
@PJL FSUPLOAD         #Useful to upload a file
@PJL FSDOWNLOAD       #Useful to download a file
@PJL FSDELETE         #Useful to delete a file
```

### Automatic

```bash
nmap -sV --script pjl-ready-message -p <PORT> <IP>
```

```bash
msf> use auxiliary/scanner/printer/printer_env_vars
msf> use auxiliary/scanner/printer/printer_list_dir
msf> use auxiliary/scanner/printer/printer_list_volumes
msf> use auxiliary/scanner/printer/printer_ready_message
msf> use auxiliary/scanner/printer/printer_version_info
msf> use auxiliary/scanner/printer/printer_download_file
msf> use auxiliary/scanner/printer/printer_upload_file
msf> use auxiliary/scanner/printer/printer_delete_file
```

### Printers Hacking tool

This is the tool you want to use to abuse printers:

{% embed url="https://github.com/RUB-NDS/PRET" %}

### Hacking Printers best reference

{% embed url="https://hacking-printers.net/wiki/index.php/File_system_access" %}

## **Shodan**

* `pjl port:9100`