Author: their senses of Redflag Linux based office automation solution with computer technology and the rapid development of Internet, Office Automation has become a general trend, in a growing number of enterprises.
Office Automation (OA) greatly enhances the Enterprise Office efficiency, reduced cost and personnel office overhead, and usually and corporate MIS system, promoting the improvement of enterprise management. In the past, enterprises of OA system usually is the case of two typical C/S or B/S architecture: server with UNIX or WindowsNT is the operating system, the user (or personal) of the workstation to Windows95/98 operating system. The advantages and disadvantages of the two programmes are obvious: the UNIX system with other operating systems unparalleled high-performance, high stability and high reliability, operation and maintenance costs are high, and it's not convenient to maintain, and UNIX complex command set and user interface allow users to intimidate; WindowsNT system user friendly interface, easy to maintain, but stability is poor. How high-performance, stability, ease of use and easy maintenance, etc, in an optimal balance? Linux appear timely solve the business users and integrators of thorny issues. With the rapid development of the Linux operating system and the popularity of Linux advantages fully revealed: as a UNIX core, WindowsNT incomparable high-performance and high stability; follow the GPL guidelines on user costs almost zero; support for Linux 3rd party applications more and more. Linux start in Enterprise Office Automation play an important role in the process. This article on the basis of practice, proposed an economic, efficient and reliable to red flag linux operating system for major OA building programme of the enterprise, allowing users to safely and securely access internal and external resources, the realization Enterprise Office's electronic, automated, paperless, minimize the cost of the Enterprise Office OA program mainly consists of the following components: l Enterprise internal local area network (Intranet) build lWebe_office Services l l l a firewall proxy services print/file services l powerful enterprise-level development platform 1. internal local area network (Intranet) to build enterprise internal local area network (Intranet) of the building is the foundation of enterprise OA system to red flag Linux1.1 Server version as the carrier, the user can easily, quickly, flexibly and cost-effectively build your Intranet network. 1.1Linux LAN network architecture (NetworkStructure) using a converter to convert the twisted-pair cable Internet interface, directly connected to one pair of network adapters on the Server. The Server of a network card and other Server and Client to connect to a Hub, a local area network. Dual network server as a firewall and gateway to control internal network and Internet connection security, in the above you can also run other services such as file servers, proxy servers, mail servers and Web servers, etc. Another server is available as a database server running on the primary database services. Dual NIC's external network adapter must have formal IP, a network card and the other computer's network connection can use private IP, free distribution, the scope of another computer gateway address that points to the firewall gateway server's internal IP. Firewall gateway server's network configuration according to the application of IP addresses to specific settings. 1.2Linux LAN hardware requirements (Hardware) in this scenario, the hardware requirements in addition to including 2 servers, PCs, network implementation of the required hardware, such as: the HUB, cable, and translators, etc. One of the most important part of the hardware, server on Linux performance demands is very important. Red Flag linux Intel chip used in the server and PC products supported on a strong advantage. To the maximum extent possible, to play to the efficiency of INTEL architecture as well as the obvious safety and reliability is the programme uses Linux as the operating system of choice. 1.3Linux LAN software requirements (Software) server software used at linux1.2 version, the database server running Linux with database software package, but as a firewall gateway servers can run several Internet applications such as: email server, Web server and the proxy server, etc. WebE-Office 2.Webe_office service (e-Office business systems) is a set of targeted at SMEs provides office automation solutions via the Internet to reach internal information delivery, user as long as you use the browser (MS-IE4.0 above) connected to the Web site, enter employee password is confirmed, you can enter the system signature files, in addition to this, also provide internal staff discussion corner and the relevant vendor information, and system management functions. These are the convenience of users in the file produced and managed with the intimate design. WebE-Office is the easiest InterNet era and the most cost-effective office automation solutions. WebE_office characteristics: 1). the simple user simply uses the browser, after several hours of training, can be highly skillful in a variety of actions. System administrators can directly through the browser E-Office System. All features are classified hierarchically, convenient, extremely easy to use. 2). the powerful document conversion capabilities provide internal circulation of electronic documents, certifying that the query. Document conversion process can be customized or flexible setting. Documents can be attachedEmail or any other document. Keep monitoring the situation of document circulation. You can send off orders, the system automatically on leave for statistics. 3). the comprehensive personnel management system using the HR zone, the entire company's personnel fully administer the system. Departments can manage the entire Department of personnel information. Staff can modify their own personal information. Flexible customization feature, you can easily build your own in the personnel system. And the combination of document circulation system, you can leave the automatic statistical staff. 4). the convenient electronic bulletin board promptly publish the company's various announcements and notifications. Provide staff who listens to the voice of the garden. Multiple methods of information retrieval. 5). the efficient enterprise information retrieval and management of your business partners of various materials. Flexible information retrieval. 6). in rigorous permission management system in all of the features are subject to the rights of protection, as long as the authorized user can use. You can assign different users with different permissions. System administrator permissions and user rights can be independent of each other. Changes to important data, the system automatically records changes people and time for future reference. 7). the high degree of stability and best price/performance to run in the Red Flag Linux Eoffice system, it is now recognized as the best operating system. Red Flag Linux system is to follow the GPL's open systems that maximize savings your overhead. We provide a complete customer service and technical support. 3. Firewall Linux Firewall for constructing ipchians provides a powerful tool. However the usage of ipchains itself is more complex, but also to flow down fees user configuration. For the convenience of the user to build intranet red flag, red flag offers the convenience of a simple firewall solution. Configuration completes for intranet users with Internet access. (1) hardware: dual-NIC or a network connection to a Modem (2) software requirements: Hongqi linux1.1, ipchains, vi (3) installation: the red flag 1.1 CD RPM package rf-firewall-1.0-0.noarch.rpm, at the command line, execute the following commands (assuming the CD or DVD drive installed in the/mnt/cdrom): $ rpm-i/mnt/cdrom/rf-firewall-1.0-0.noarc.rpm (4) in the edit profile/etc/gw source and dest. Source is the internal network and a list of the mask. File format: 192.9.200.17 ipav_mask, for example. It represented the subnetted 192.9.200.1, "7" is the mask in the subnet address of binary digits "0". Assuming that the mask 255.255.255.128, is represented as binary 11111111.11111111.11111111.10000000, of which 25 "1", "7" x 7 "0," is to represent the subnetwork address of binary digits "0". In other words, you need to convert a binary mask, few out several of 0, the value is av_mask. Such as mask 255.255.0.0 for the subnet number is 16. Dest is the internal users can access a list of addresses. If you decide not to limit, as long as some net bit write 32, such as 0.0.0.032. If the entry fee is the flow, you want to limit access to internal network users abroad, the red flag of dest file is a limiting case of abroad, to see. (5) starts automatically and manually start at Firewall default is started automatically, if the user does not want to automatically start, do one of the setup command, the selected services setting rf-firewall close. Users can also manually start, shut down or restart the firewall. Command: manually start command as:/etc/rc.d/init.d/rf-firewallstart manually close command:/etc/rc.d/init.d/rf-firewallstop manually restart the firewall:/etc/rc.d/init.d/rf-firewallrestart view firewall rules/etc/rc.d/init.d/rf-firewallstatus (6) note in dest and the source subnets in if you have several addresses for 32, then the other constraint is invalid. (7) the internal networks network set the internal network machine TCP/IP to your firewall host machine's IP as gateway. The intranet DNS there are two solutions that work directly with the actual DNS of your ISP, or configure the firewall's machine into DNS resolving internal network domain name, and forward the other domain name. 4. the proxy service for simple proxy, you can modify the file/etc/squid/squid.conf to meet your needs. The steps below. 1. find the http_port NETWORKOPTIONS part set to the desired port number. 2. find OPTIONSFOREXTERNALSUPPORTPROGRAMS part, ftp_user set to any anonymous logon password, it can be any email address. 3. find ACCESSCONTROLS section, in this section to carry out the following work. (1) defined acl access list. Details see/etc/squid/squid.conf file comment. (2) defines the http_access, icp_access access details please see the file/etc/squid/squid.conf comments. For example, here is the file/etc/squid/An example of squid.conf. #NETWORKOPTIONS #------------------------------------------------------- http_port1081 #OPTIONSFOREXTERNALSUPPORTPROGRAMS #------------------------------------------------------- ftp_user anyone@email.server.com #ACCESSCONTROLS #------------------------------------------------------- aclncic
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