“Penerapan Firewall Dan Protokol IpSec L2TP Sebagai Solusi Keamanan Akses Jaringan Publik ”. Computer Science (CO-SCIENCE) 1, no. 2 (July 26, 2021): 81–90. Accessed May 23, 2026. https://jurnal.bsi.ac.id/https:/jurnal.bsi.ac.id/index.php/co-science/article/view/435.