The NOC (Network Operation Center) Division is highly dependent on the availability of internet access in carrying out its duties to monitor and maintain the network remotely. Therefore, the absence of adequate internet access will determine the performance of the work performed by the NOC division. However, problems often occur on computer networks or the internet that can hinder the work done by the NOC division, these problems include, such as the process of uploading or downloading files from the server feeling slow, unable to send emails smoothly, connections often experiencing time-out, There is a long network downtime, as well as traffic congestion on the network which can reduce network reliability. To solve this problem, one solution that can be done is to implement load balancing and failover mechanisms on the network using a MikroTik router. This study aims to design a load balancing scheme using the per connection classifier (PCC) method to overcome traffic congestion problems on the network. The research was conducted using field research methods using observation and interview techniques which were conducted from August to December 2020. The results showed that the application of the load balance technique on the xMikrotik router with the PCC (Per Connection Classifier) method can separate the internet connection through the two available ISP lines so that it can solve the problem of traffic buildup on one of the ISP links to reduce latency and improve existing network performance.

IPSec based VPN (Virtual Private Network) is a standard that provides data confidentiality, data integrity, and source authentication on public communication such as the internet. IPSec VPN is a secure technology and reliable (secure and reliable) which can connect private networks between campuses using internet public communications. The availability of data and services in real-time is very much needed by the main campus to ensure that operational and business activities at branch campus and main campus run smoothly. FortiGate is the best choice for system security that provides high protection against threats dynamic security and simplifies the IT security infrastructure company. This study aims to build a VPN (Virtual Private Network) based on IPSec. The research was conducted on a Wide Area Network using two FortiGate devices as a firewall and gateways are connected to each other and form a tunnel as a special path connect private networks between campuses securely. The results showed that clients at branch campus can access servers located at the main campus in real-time, and data transfer performance between branch campus and main campus was successfully accepted, and getting bigger packets sent, the file transfer process time will also be longer