Comunicación IPv4 segura entre áreas universitarias a través de conexiones de internet

Abstract

University campi have access to the Internet and RedUNAM through links contracted with Internet service
providers. This network scheme offers direct connection to the Ciudad Universitaria campus with dedicated
private links (LAN-to-LAN and enterprise virtual private network). However, if these direct connections
fail, communication between university campi is interrupted, as DNS service and RedUNAM resources
are lost, resulting in almost complete outage in some locations. The impact of these incidents is mitigated
manually with the intervention of staff from the General Directorate of Computing and Information and
Communication Technologies, through the area responsible for ensuring the continuity of communication to
and from university campi outside Ciudad Universitaria. The need for an automated network scheme to avoid
manual mitigation, which would waste valuable time restoring communication, led to the development of
an alternative connection using the same current operating resources. This would ensure that, even if failures
occur at any time of day, users would not notice the automatic traffic changes. A VPN built over Internet links
that provides security for the information exchanged is the solution proposed in this technical report.