Scripting tcpdump for future access

You may want to export network captures to avoid running out of space on the local Raspberry Pi. Here are some steps to export the captured data to an external source for more resource-intensive tasks such as password cracking or for reporting purposes. These are also ideal for other sections of this book that require exporting data.

In Chapter 2, Preparing the Raspberry Pi, we recommended setting up a remote server that is also known as a C&C server. We also mentioned transferring captured files to an FTP server in one of the previous steps in this chapter. Regarding the use of FTP, it is important to remember that FTP is inherently insecure. People have used FTP for a variety of different reasons. However, for real world penetration testing exercises, it is critical to protect FTP through another form of encryption such as an Internet Protocol Secutiry (IPsec) tunnel or SSH/Secure File Transfer Protocol (SFTP). IPsec ensures all data transfers never...