This is also something that NSA does: https://www.infoworld.com/article/2608141/snowden--the-nsa-planted-backdoors-in-cisco-products.html https://www.infoworld.

This is also something that NSA does: https://www.infoworld.com/article/2608141/snowden--the-nsa-planted-backdoors-in-cisco-products.html https://www.infoworld.com/article/2608141/snowden--the-nsa-p... Nowadays it appears that there is no escape. It appears that there is always some backdoor in network hardware planted by one of the major countries.