@thesis{thesis, author={Hanief Nugroho Hariadi}, title ={Analisis quality of service (qos) layanan voice over internet protocol (voip) pada jaringan VPN softether}, year={2018}, url={https://repository.ittelkom-pwt.ac.id/582/}, abstract={Voice over Internet Protocol (VoIP) is a technology for sending voice information using the internet with information technology that will be converted into packet data packets in digital form for the purpose. VoIP is sent on an IP basis, it can intercept the data packets for later re-listen. Therefore it is necessary to close the vulnerability. One of the countermeasures is to apply security technology Virtual Private Network (VPN) on VoIP network. Softether is one of the open source VPNs that has the advantages of multi platform VPN which means Softether can accept connections from various VPN protocols. In this research, simulation test is done by establishing VoIP and VPN connections then analyzing to design delay parameters, jitter, throughput, and packet loss to determine QoS of VoIP service on VPN network. The test used 5 scenarios with traffic variation value 0 kbps, 5000 kbps, 10000 kbps, 15000 kbps, and 20000 kbps. Then make an observation using wireshark application during the call for 90 seconds. Sampling is done 30 times in each scenario then search the average value for each parameter. Based on TIPHON standardization the results show that the delay and jitter parameters are included in good categories while for packet loss decreased quality. This is seen from packet loss value in scenario with traffic load of 0 kbps and 5000 kbps included in good category, but decrease in scenario with 10000 kbps traffic load including medium category and scenario with traffic load 15000 kbps and 20000 kbps including bad category. Keyword : VoIP, VPN, Softether, QoS, Delay, Throughput, Jitter, Packet Loss} }