The Border Gateway Protocol or BGP allows different organizations to exchange routing information, which in turn allows interconnecting the Internet. BGP operation in carrier environments involves complex aspects which in recent times have been compounded by the emergence of certain security events such as route hijacking and route leaks. This tutorial is divided into two parts. The first session will present the basics of the BGP protocol as well as basic operational aspects in carrier environments. The second part will introduce some of the new trends in routing security, specifically origin validation using resource certification (RPKI). Both parts will include practical activities. Participants are encouraged to bring their laptop computer.