Umam, Chairul, Emilia Roza, and Irfan Irfan. “Perancangan Jaringan Keamanan Virtual Private Network (VPN) Site to Site”. Prosiding Seminar Nasional Teknoka 1, no. 1 (June 6, 2017): 23-30. Accessed August 19, 2022. https://journal.uhamka.ac.id/index.php/teknoka/article/view/335.