防火墙源码（用C++编写）

NetCenturion ============ NetCenturion is a TCP/IP packet filter that can protect your computer from unauthorised access and attacks while connected to the public Internet. NetCenturion can make your computer appear invisible from the Internet and can protect vulnerable Windows services such as file sharing. It does all this while you continue to enjoy uninterrupted web browsing, e-mail, downloading and other Internet activities. NetCenturion monitors all incoming and outgoing IP packets to ensure that vulnerable TCP/IP services are not exposed to security threats or attack. NetCenturion is shareware; that is it may be freely used by any individual for personal or private use or for their business without any restriction or charge. Companies, organizations or governments may not use it without a license. In no case may NetCenturion be re-sold or used to deprive anyone of life, liberty or livelihood. Copyright (C)2003-2005 Software Systems Consultants. Web: www.softsystem.co.uk Tel: +33 5 49 72 79 63 e-mail: netcenturion@softsystem.co.uk Requirements ============ You will need: - An Intel Pentium compatible PC running Windows XP (Home, Professional or Server) or Windows 2000 (Professional or Server). - 1 MB of free disk space. - A Windows supported TCP/IP network e.g. dial-up line or Ethernet LAN. Installation ============ If you have a self-extracting WinZip archive (.exe) file then double click it to expand the files into a new empty directory. If you have a ZIP archive then use WinZip or similar to extract the files. Either logon to an account with administrative privilege and double click the file 'setup.exe' or right click 'setup.exe' while holding the shift key down. A popup a menu containing a "Run as..." item will appear. Click "Run as.." and enter the user name 'Administrator' and the password, then press OK. This will install NetCenturion and create the default rules file. The NetCenturion Configuration Application will then be started to enable customisation of the filtering rules and other options. Removal ======= Open the control panel, open Add/Remove Programs, select NetCenturion from the list box and press Add/Remove. WARRANTY ======== NetCenturion is supplied 'as is' with abolutely no warranty given or implied. The use of NetCenturion is entirely at the risk of the end user. Software Systems will not be held responsible for any loss or damage resulting from the use of NetCenturion. Release History =============== 1.2.0.4 05-Oct-05 Added IGMP protocol filter to IpFilter.c Added IGMP to NetCenturion UI. 1.2.0.3 26-Jun-05 Added IGMP packet logging in IpFilter.c. Added more extensive ICMP packet logging in IpFilter.c. Filter UDP packets to ports > 1024 in default netcenturion.ini. NetCenturionCfg searches for ini file in current and executable directory. Improved installation script, now installs to 'Program Files' folder. 1.2.0.2 18-Jan-05 Updated asl_cfg.h & cfg.c to support ASL_CfgSetValue & ASL_CfgSetString Revised asl_host.h: ASL_EXPORT depends on ASL_DLL, remove ASL_SOCK_LIB 1.2.0.1 14-Oct-04 Extra logging during filter matching Fix UI bug - refresh protocol after rule edited Fix UI bug - subnet mask of 0 now accepted 1.1.0.1 14-Sep-03 Added support for multiple intefaces to UI Moved 'Advanced option' to 'New Interface' dialog Added 'New log' button to UI and control option to filter service Change default rules to exclude ports 135,137,138,139 and 445 1.0.0.1 13-May-03 Initial release