Design Method and Monitoring Special Traffic Filtering under Developing «Electronic Government»

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1 Design Method and Monitoring Special Traffic Filtering under Developing «Electronic Government» Sherzod Gulomov, Abduaziz Abdurakhmanov, Nurbek Nasrullaev 3,,3 A.Temur street 08, 000 Tashkent, Uzbekistan Abstract This article describes method control of virtual connections network traffic to improve performance monitoring of network traffic and Firewall, protection network traffic and Firewall from external threats. Implemented parallel processing virtual connections are realized in the modes direct bells and queuing packets in nodes. The assessment of the effectiveness of traffic filtering in the network graph and monitoring of the special traffic filtering in the development of «E-Government». Keywords virtual connection, mode direct bells, mode of management queue packet, network graph, Hen-cloudy platform. I. INTRODUCTION «Electronic Government» the utilization of Information and Communication Technologies (ICTs) to improve and/or enhance on the efficiency and effectiveness of service delivery in the public sector. «E- Government» use of technologies to facilitate the operation of government and the dispersion of government information and services. «E-Government» can be viewed as consisting of a set of phase not entirely sequential, but relying on growing levels of capability, knowledge and infrastructure []. On this basis for protection the system of «E-Government» from internal and external threats are offered method and monitoring special filtering traffic. The research of the security problems of network system is becoming particularly important in connection with complex structure and dynamic nature of the portioned ambience, particularly in virtualized system. Decision of information secure such as Firewall, very sensitive to capacity levels. The information channels support enormous reception capacity, 0 gbit/s, nearly everywhere. In 0 gbit/s Ethernet set Firewall must come to a conclusion not less than ms for packet. In this time Firewall must check reality of the protocol and pass checking for rule of the filtering in different network levels from channel to applied level []. Today virtualization is being broadly used on different enterprises. Many companies use the cloudy providers and beside average and large business there is own computing infrastructure on base of virtualization. The virtual systems are hidden from hardware. Thereby virtual connection, as a rule, is not being checked. Virtual connection of Firewall enables to scale the resources, secretiveness IP-addresses and IP ports of the network traffic depending on the current situation by changing the number of cores or memories during execution. II. DEVELOPING «E-GOVERNMENT» IN UZBEKISTAN Nowadays our Republic is developing in sphere «E- Government» step by step. The research of high technology in all sectors and spheres of life in Uzbekistan, expansion of interactive public authorities with the population and business entities - the key to the dynamic development of the country. At the same time, progress is impossible without security [3]. Therefore, the creation and interaction of the center for development of «E- Government» is a necessary step in the development of national information and communication system of our country. III. APPROACH OF THE DESIGN CONTROLLING VC IN NETWORK TRAFFIC The of packet is described in the manner of set of the virtual connection between users and services. Virtual connection (VC) is logically ranked messaging between elements of the networks. VC is being classified as technological virtual connection (TVC) and information virtual connection (IVC) models. Technological virtual connection describes the network protocols, for instance, TCP sessions between users and databases. Information virtual connection describes the applied protocols, for instance, HTTP sessions with webserver. IVC can use several TVC, for instance, FTP sessions use TCP connections; one for data, but another for checking the message. Conversely, TVC can belong to several IVC, for instance, constant connection in HTTP, client can use existing connection TCP for plural requests (see Figure ). For flexible checking the access and governing the traffic is being offered three groups under bar TVC: possible important connection, avoiding additional control; forbidden connection; other connection, which not prohibited. 66

2 The first group is a priority connection and third group background connection. All packets of the VC in the second group are rejected and not taken into account [4]. User Technological virtual connection Network protocols TCP sessions Database Virtual connection Information virtual connection Application protocols HTTP sessions In such an event problem checking VC is possible to describe in the form graph ( ), named by information graph of the checking VC. presents set of the nodes with itself and presents ensemble of rib between nodes. The graph of the checking VC consists of the ensemble of tops, to each of which is prefixed operation. If two nodes and by united arc, that as a result operation is an entry for operation. Each node has an arc, which corresponds to mate, when. In this case VC is considered forbidden and the further analysis is not produced (see Figure ). Finding the contest Y i Check policy of access control Webserver Network packets F F Verifica tion packets F 4 F n- Discovery of anomaly F(Y i) Figure : Hierarchical structure of shaping the connection session by using the models of TVC and IVC. VC, as a certain abstraction, exists parallel and regardless from other virtual connections, herewith the virtual connection has not separated resource between itself that allows to realize their parallel processing. The offered method to filtering the network traffic, built on base of the virtual connection, allows to select the context of the connection, which possible presents in the manner of vector, describing its parameters, for instance such as ports and address of the source and receiver, condition of the connection. Checking the virtual connection there is calculation of indicative function, for performing which are required such resources, as computing processors and operative memory: ( ) * + () Indicative function takes importance: if VС is allowed; 0 if VС is forbidden; if for the current moment it is impossible uniquely to define forbidden it or not, decision is postponed and VC is temporarily allowed. The calculation of indicative functions decomposing on ensemble of the computing processes * + * +, where number of the independent calculations of the processes, for instance, estimation of the VC consists of checking the rules to filtering, check the reality of protocol, check the intensities and checking the contents. F 3 Figure : Information graph of the controlling VC. The multiprocessor computing system, which executes the analysis of the network traffic, is being described as full nets of the system of the calculations graph with computer MIMD (the plural of the commands, plural data ) as its nodes. This graph is full for net because communications between processor are given by means of hardware-software programs and no predestined way between cores; given possible to send directly from one node to another. The graph checking VC possible to divide into disjoint sub-graphs and build the conveyor of the processing VC, as well as due to the fact that VC exists independently each other, possible their parallel processing. At presence of the evaluators MIMD type, at the moment of processing the VC will be limited by correlation: ( ( )) ( ) Where ( ) the amount of tacts are required for calculation, average time of the frequency of the processor in calculation. The inequality appears due to the fact that decision on categorizations VC can be accepted before completion of the passage of all nodes graph. () F n 67

3 Due to heterogeneity and re-configurability of the computing ambience in row of the events possible to adapt the desk-side of the Firewall under solved at present problems of the delimitation of the access. Reaching this possible by graphic models of the processing the network traffic and using the technologies network graph, allowing organize processing the network traffic in context operating system cores. These technologies allow to organizations of the processing the network traffic in context of the usages of the system. (3) In figure 3 presented an example to information graph checking the VC with decomposition the indicative functions of the checking on component [5]. The presented method together with use of technologies to virtualization resource allows to raise capacity of the checking the network traffic and Firewall, security of network traffic and Firewall from external attacks, which need for decision of the current tasks of the delimitation of the access. 68

4 Finding the context ВС Yi Check policy of access controls Network packets F F F3 Verification packet F4 Fn- Discovery anomaly F(Yi) Fn of FreeBSD Network graph n Eth Eth n nm Processor Processor Wj Basket Figure 3: Information graph of the controlling VC with using cores of processors. 69

5 VC must be processed on frequentative cores. The network packets are balanced between cores by means of determined VC. So, if order packets in virtual connection is not damaged that process of the traffic allows parallel to use the network sub-system a graph. IV. REALIZATION OF THE PARALLEL PROCESSING TRAFFIC IN VC For realization of the parallel processing the traffic in network sub-system graph is used part core of FreeBSD. This decision allows to referencing the network connection in mode core and this is realized by means of several cores. But in cores mode the program produces a new level to realization, in effect what appears the new sample of the behavior, which must be evaluated and carefully marketed. The cost of the program errors rather high; the errors level core cause the full malfunction of the system and rebooting the Firewall. But if software stable practiced and is checked, that such approach will provide the possibility to high efficiency. The desk-side of the Firewall can be changed during execution by accompaniments and removing the elements in graph of the topologies. This allows increasing functionality traffic filtering and perfect power to account of the parallel processing the traffic in separate thread core. The network graph has a complex architecture and works differently, depending on used nodes, including protocols and marketed algorithms. When network graph appears that he creates the association of the threads core. Amount of the threads are count; calculate; list available core. These threads are used for processing the messages. The network packets introduce as buffers of the structures, are sent between nodes network graph. In total, network graph works in two modes - direct bell and management queue packets in nodes. The state of working depends on topologies graph and realization of the nodes. V. BALANCING THE NETWORK TRAFFIC IN MODE DIRECT BELL This decision completely depends on core of network interface, realization of the module and use the hardware. Not all networks of the interface process the traffic with use several cores. As a rule, this is realized in high efficiency 0 G bit Ethernet network. In this case network graph uses the mode direct bell for processing the traffic. Traffic filtering works right in network card - a packets arrives to prevent the event of the context to threads [6]. The network graph uses the algorithm, founded on attribute of the virtual join for balancing the traffic. For connecting TCP, the network graph sends the packets of the concrete VC to concrete cores. For UDP protocol it sends the packets to any available cores. Network interface Driver of the network interface Processor Processor Processor N s of FreeBSD Packet is balanced on specific thread Network graph 3 Figure 4: Structure of balancing the network traffic in mode direct bell. Figure 4 is shown the structure of balancing the traffic in cores of FreeBSD. The packets enters in network interface, then it is processed on the part of network graph of the nodes Ethernet and passes in the manner of packet to the following module, using mode direct bell [7]. Each following node values the packet in accordance with rule of the filtering, condition to models of the network protocol, contents of the packet and if packet pertaining to what, that VC will be considered as allowed, that packet leaves the coming interface. If VC is forbidden, that packet is rejected and VC is noted as forbidden. In this case traffic routing the through nodes network graph, but he is processed in one threads. Such behavior introduces in the manner of one process, which is described as process graph with ensemble of the conditions * + and sets of the cores of the action ( ): * + (4) Action ( ) * + (5) Where action ( ) is ABC of the action object coming packet, object entering packet, leaving action (the connection is forbidden), coming action is allowed-join is permitted, packet processing action, which system goes to take the following packet. Process of the work network graph is shown in figure 5. The process expects the entering events, when packet plans transition on concrete thread, which is valued on chain by nodes network graph, that node takes the object of the packet, values it and generates four actions: 4 Packet moves from node to node, using mode direct bell 70

6 the decision is not accepted (the process of the packet on the following node); connection is permitted; the connection is forbidden; displacement packet in casting-out. Allowed Driver of the network interface of FreeBSD P Network graph b a! a! a! p? p! p? p! p? p! p? Waiting f i f i+ f n Network interface Processor L Processor L Processor L 3 P 3 P b d! d! d! Processor L m P n Forbidden d! n Refuses Figure 5: Control connection of process graph. VI. MODE OF MANAGEMENT QUEUE PACKET IN NODES The second approach is concluded in management queue packet in nodes network graph in miscellaneous to threads core. In described situations each node network graph separate process, which takes the actions of the message with object network packet and produces same messages, is shown in figure 5. But checking of the whole connection of the process presents itself parallel composition processor nodes network graph and is a parallel composition amount processor of the network interface: ( ) и ( ) (6) Figure 6: Nodes network graph with cut management a queue packet. This decision allows realizing parallel processing the traffic by means of conveyor of the nodes, which treat data in separate of the threads. The strong point of this decision is an absence of the equipment and network (see Figure 6). Each node is processed on core in separate thread. When packet arrives to node that it will turn out to be in queue FIFO (first came - first has left). VII. ESTIMATION TO EFFICIENCY TRAFFIC FILTERING IN MODES OF NETWORK GRAPH Traffic filtering is started as virtual machine in Hencloudy platform of the hypervisor [8-9]. Traffic filtering has two interfaces, which were connected with physical network by means of bridge and commutation in hypervisor of the service to consoles, which is submitted in figure 7 and in figure 8. 7

7 International Journal of Emerging Technology and Advanced Engineering Client Server Eth 0 Eth Figure 7: Scheme connection traffic filtering in modes of network graph. Client Bridge Bridge 0 XEN cloudy platform of the hypervisor TCP network Switch Switch Traffic filtering in modes of network graph Server Table. Scalability Tests Of Checking Traffic Mode direct bell Mode of management queue packet in nodes 4 TCP,47,48,48,5,5 0,5 0 TCP,47,49,49 TCP 3 TCP,47,47,48 TCP 3 TCP TCP,46,56,55 TCP,48 3, 3, TCP s 3 TCP,47 3,8 6,30 4 Mode direct bells Figure 9: Diagram result testing of mode direct bell. Mode of management queue packet in nodes Traffic filtering in modes of network graph Cor e Cor e Cor e 3 Cor e TCP TCP 3 TCP TCP s 4 Processor Processor Processor 3 Figure 8: Structure of the scaling the processes on base of the realization modes of network graph in traffic filtering. For performing action client by part are used different desk-sides. In traffic filtering is used mode of the network traffic in nodes. Several TCP connections, are used client by part and enter to one, two and four deskside core. The action to traffic filtering is scaled nearly linear. The got results were provided in table. Figure 0: Diagram result testing of mode management queue packet. VIII. MONITORING SPECIAL TRAFFIC FILTERING Monitoring special filtering traffic characteristics vary (productivity, types of network interfaces, additional functionality) and qualitative indicators. functionality includes: filter the register of banned sites; analytics channel; policed. 7

8 Additionally, the client available options: cached audio / video; parental control and managerial; protection against DDoS. Filtering on the roster of banned sites: Allows restrict access to illegal information on the Internet in accordance with the Unified Register of banned sites. Main Features: filtering by URL http protocol with the ability to block certain pages without blocking the whole resource; depending on the configuration of the browser or return response code (prohibition) or redirected to a website [0] with information for the user (the creation of the site and its support is not included in the service provided); support to deny access to https protocol over IP and port by disconnection; centralized automatic loading of the list of blocked sites via the Internet. Analytics channel: This function provides statistical information on traffic passing through the channel. The total list of information include: total number and volume of transmitted and received packets; the current rate of entry and exit in ; % and the number of lost packets; the number and volume of received and transmitted data disaggregated by protocols; the current number of sessions; the number of checked and blocked URL to http. Policed Means traffic bandwidth management (QoS) depending [] on the application protocols and load: ability to save up to 33% of the channel capacity by limiting PP protocols; provide internal telephony priority in relation to other VoIP service; ability to mark traffic in the fields DSCP/ TOS IPpacket priority and VLAN/MPLS, depending on the application protocols for the subsequent application of QoS policies on the routers. IX. CONCLUSIONS Thereby offered method allows protecting the portioned computing ambience both from external, and from internal threats and attacks on base of technologies network graph and monitoring special traffic filtering by some steps. Introduction to transparent filtering the network traffic insulates the hypervisor from virtual computing machines that exclude the possibility of the attack of the hypervisor from internal network. Overall, offering method fully provides the part of security «E- Government» from external and internal actions in field information and communication technologies. REFERENCES [] Grima-Izquierdo, C. A generic architecture for E-Government and E-Democracy: requirements, design and security risk analysis. Ed. LAP Publishing (00). [] F. Schneider, J. Wallerich and A. Feldmann, «Packet capture in 0-gigabit Ethernet environments using contemporary commodity hardware»(007). [3] Zayniddinov Kh. H., Yakubov M. S., Koraboev J. F. «E- Government» Publishing «Akademia». Tashkent, 04, 76 pages. [4] Silinenko. Access control in IP networks based on virtual connection state models: PhD. Thesis :/SPb SPU, Russia, 00. [5] Cobbs A., 003. All about Netgraph URL: [6] Vasiliadis G., Polychronakis M., and Ioannidis S. Parallelization and characterization of pattern matching using GPUs. In Proceedings of the 0 IEEE International Symposium on Workload Characterization (0). [7] W. Wu. G-NetMon: A GPU-accelerated network performance monitoring system for large scale scientific collaborations. In IEEE LCN, 0. [8] Cloud Security Alliance, Top Threats to Cloud Computing, March, 00. URL: [9] E. W. Fulp, «Optimization of Network Firewalls Policies using Directed Acyclic Graphs», IEEE Internet Management Conference, 005. [0] Enterprise Network Monitoring: Including Plug-Ins and Hardware Devices/ M. Schubert, D. Bennett, J. Gines, A. Hay, J. Strand/ Syngress Publishing,-008,-P [] Network Security Monitoring in Minutes/ Richard Bejtlich/ No Starch Press, Incorporated, -03.P

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