Monitoring of Web Service Availability in Distributed Infocommunication Systems

In this paper we improved technique of securing the web services against DDoS attacks based on the analysis of service information, which is based on monitoring of session duration from log files. This will increase the effectiveness of monitoring the security of web applications in distributed information systems after the attack of the first stage of its protection. The algorithm for monitoring the status of system based on log messages that are written to a file during the firewall stage has been proposed. Each message contains such information as web service request time and ip address. Using the time of access to the web service, you can track the attendance, and in the case of sharp differences with the number of visits in the previous intervals, to say about a possible attack. IP addresses us by tracking the number of requests from each request source, tracking who is causing the attack. Investigation of the effectiveness of the developed web application for monitoring of the security system in distributed information communications systems has shown that at a time when the number of visits is increasing dramatically, the incoming requests queue is growing rapidly. This indicates a possible attack.