Masaharu Tadauchi

Secure DACS Scheme

When customers with different membership and position use computers as in the university network systems, it often takes much time and efforts for them to cope with the change of the system management. This is because the requirements for the respective computer usage are different in the network and security policies. In this paper, a new destination addressing control system scheme (DACS Scheme) for the university network services is shown. The DACS Scheme performs the network services efficiently through the communication management of a client. As the characteristic of DACS Scheme, only the setup modification is required by a system administrator, when the configuration change is needed in the network server. Then, the setup modification is unnecessary by a customer, which shows a merit for both a system administrator and a customer. However, there is a problem to be solved. In existing DACS Scheme, it is assumed that DACS Client for controlling the communication must be implemented on all clients. If the client without DACS Client is connected to the network, each network server can be accessed from the client. Therefore, in this paper, secure DACS Scheme with the function to prevent the communication from the client without DACS Client is proposed and examined.

Efficient Network Management System with DACS Scheme

Where customers with different membership and position, use computers as in the university network systems, it often takes much time and effort for them to cope with the change of the system management. This is because the requirements for the respective computer usage are different in the network and security policies. In this paper, a new destination addressing control system (DACS) scheme for the university network services is proposed. The DACS scheme performs the network services efficiently through the communication management of a client. As the characteristic of DACS scheme, only the setup modification is required by a system administrator, when the configuration change is needed in the network server. Then, the setup modification is unnecessary by a customer, which shows a merit for both a system administrator and a customer. This paper describes the instruction and the prototype for DACS protocol as the implementation of DACS scheme. Then, the simplicity of the system management in DACS scheme, is examined from the customer and the system administrator viewpoints

New network management scheme with client’s communication control

Where customers with different membership and position, use computers as in the university network systems, it often takes much time and efforts for them to cope with the change of the system management. This is because the requirements for the respective computer usage are different in the network and security policies. In this paper, a new destination addressing control system (DACS) scheme for the university network services is proposed. The DACS Scheme performs the network services efficiently through the communication management of a client. As the characteristic of DACS Scheme, only the setup modification is required by a system administrator, when the configuration change is needed in the network server. Then, the setup modification is unnecessary by a customer, which shows a merit for both a system administrator and a customer. This paper describes the instruction and the prototype for DACS Protocol as the implementation of DACS Scheme. Then, the simplicity of the system management in DACS Scheme, is examined from the customer and the system administrator viewpoints.

New user support in the university network with DACS scheme

Purpose – The purpose of this paper is to propose and examine the new user support in university network.Design/methodology/approach – The new user support is realized by use of DACS (Destination Addressing Control System) Scheme which manages a whole network system through communication control on a client computer. This DACS Scheme has been studied conventionally by authors.Findings – The new user support is more simplified than the normal user support in the network based on TCP/IP.Research limitations/implications – As a future research, the authors will implement the system for realizing DACS Scheme and apply that system to practical network. Then, the new user support proposed in this paper will be realized in practical network.Practical implications – The functions needed for the new user support are confirmed. Some functions was confirmed in the past research. The other function is confirmed in the section of experimental results.Originality/value – In the network introducing DACS Scheme, the sett...

Efficient User Support with DACS Scheme

When operation and management in the university network are performed, various problems occur. As one of those problems, user support problems in the network are often shown. As an example, support at the time of changing setups of a client computer by a user, is described. In this case, it take trouble very much for a system administrator because it is often necessary to support individual users, respectively. As another example, it is necessary to take some measure for annoying communication to other users. In this case, much time and effort are spent to specify where the client with annoying communication is under the management by DHCP service. To simplify user supports such as those cases, a new user support by DACS (destination addressing control system) scheme, which is an efficient scheme for the network operation and management in university network, is examined.

Extended DACS Scheme Implementing Security Function

When customers with different membership and position use computers as in the university network systems, it often takes much time and efforts for them to manage a network system. This is because the requirements for the respective computer usage are different in network and security policies. In this paper, the destination addressing control system scheme (DACS scheme) for the university network services is shown. The DACS scheme performs network management efficiently through the communication control of a client. As the characteristic of DACS scheme, only the setup modification is required by a system administrator, when configuration change of the network system is done. Then, the setup modification by a customer is unnecessary, which shows a merit for both the system administrator and the customer. But, there are some security problems to be solved. In this paper, secure DACS scheme is proposed and examined. Secure DACS scheme has functions to prevent the communication from the client which DACS client is not installed in and to prevent information interception.

New access control on DACS scheme

Recently, social interest about network security becomes very high including the issue of information leak through a network. As one of the important technologies about network security, there is an access control for network service. There are some methods of access control: access control by packet filtering mechanism on the server side, access control by the communication control mechanism on the network course such as SSL-VPN, and access control by packet filtering mechanism on the server side such as personal firewall of quarantine network. In this paper, new access control is realized. This new access control is realized as the result of combining the above two methods and improving each others problems.

Evaluation of processing load in the network with DACS scheme

The study of DACS Scheme, which manages a whole network system by communication control on a client computer, has been advanced. The problem for applying DACS Scheme to practical network is that, processing load is heavy at the time of controlling communication. In this paper, we propose models for managing a whole network system; Course management type model (COMTM) and Client management type model (CLMTM). Each processing load which occurs at the time of controlling communication in these two models is compared. It is shown that, DACS Scheme which is CLMTM is advantageous in comparison with COMTM from the point of processing load, which occurs at the time of control communication.

DACS scheme as next generation Policy-based network management scheme

As the work for managing a whole network effectively without a limited purpose, there is the work of PBNM (Policy-based network management). PBNM has two structural problems such as communication concentration from many clients to a communication control mechanism called PEP (Policy Enhancement Point) and the necessity of the network system updating at the time of introducing PBNM into LAN. Moreover, user support problems in campus-like computer networks such as trouble user support at updating a clients setups and coping with annoying communication can not be improved by PBNM. To improve these problems, we show a next generation PBNM which overcomes theses problems and has the function which does not exist in existing PBNM, and called it DACS (Destination Addressing Control System) Scheme. By DACS Scheme, communication concentration from many clients to PEP is solved, and system updating becomes unnecessary. Moreover, user support at updating the clients setups and coping with annoying communication by DACS Scheme becomes very effective.

Functional Extension for Solving the Loophole Problem of DACS Scheme

Where customers with different membership and position, use computers as in the university network systems, it often takes much time and efforts for them to cope with the change of the system management. This is because the requirements for the respective computer usage are different in the network and security policies. In this paper, destination addressing control system scheme (DACS scheme) for the university network services is shown. The DACS scheme performs network management efficiently through the communication management of a client. As the characteristic of DACS scheme, only the setup modification is required by a system administrator, when configuration change of the network system is performed. Then, the setup modification is unnecessary by a customer, which shows a merit for both a system administrator and a customer. However, there is a problem to be solved. In existing DACS scheme, it is promised that, DACS client for controlling the communication must be implemented on all clients. When the client not installing DACS client is connected to the network, each network server can be accessed from the client. Therefore, in this paper, secure DACS scheme with function to prevent the communication from the client not installing DACS client, is proposed and examined.