10Sstevel@tonic-gate@(#) BLURB 1.28 97/03/21 19:27:18 20Sstevel@tonic-gate 30Sstevel@tonic-gateWith this package you can monitor and filter incoming requests for the 40Sstevel@tonic-gateSYSTAT, FINGER, FTP, TELNET, RLOGIN, RSH, EXEC, TFTP, TALK, and other 50Sstevel@tonic-gatenetwork services. 60Sstevel@tonic-gate 70Sstevel@tonic-gateThe package provides tiny daemon wrapper programs that can be installed 80Sstevel@tonic-gatewithout any changes to existing software or to existing configuration 90Sstevel@tonic-gatefiles. The wrappers report the name of the client host and of the 100Sstevel@tonic-gaterequested service; the wrappers do not exchange information with the 110Sstevel@tonic-gateclient or server applications, and impose no overhead on the actual 120Sstevel@tonic-gateconversation between the client and server applications. 130Sstevel@tonic-gate 140Sstevel@tonic-gateThis patch upgrades the tcp wrappers version 7.5 source code to 150Sstevel@tonic-gateversion 7.6. The source-routing protection in version 7.5 was not 160Sstevel@tonic-gateas strong as it could be. And all this effort was not needed with 170Sstevel@tonic-gatemodern UNIX systems that can already stop source-routed traffic in 180Sstevel@tonic-gatethe kernel. Examples are 4.4BSD derivatives, Solaris 2.x, and Linux. 190Sstevel@tonic-gate 200Sstevel@tonic-gateThis release does not introduce new features. Do not bother applying 210Sstevel@tonic-gatethis patch when you built your version 7.x tcp wrapper without 220Sstevel@tonic-gateenabling the KILL_IP_OPTIONS compiler switch; when you can disable 230Sstevel@tonic-gateIP source routing options in the kernel; when you run a UNIX version 240Sstevel@tonic-gatethat pre-dates 4.4BSD, such as SunOS 4. Such systems are unable to 250Sstevel@tonic-gatereceive source-routed connections and are therefore not vulnerable 260Sstevel@tonic-gateto IP spoofing attacks with source-routed TCP connections. 270Sstevel@tonic-gate 280Sstevel@tonic-gateA complete change log is given in the CHANGES document. As always, 290Sstevel@tonic-gateproblem reports and suggestions for improvement are welcome. 300Sstevel@tonic-gate 310Sstevel@tonic-gate Wietse Venema (wietse@wzv.win.tue.nl), 320Sstevel@tonic-gate Department of Mathematics and Computing Science, 330Sstevel@tonic-gate Eindhoven University of Technology, 340Sstevel@tonic-gate The Netherlands. 350Sstevel@tonic-gate 360Sstevel@tonic-gate Currently visiting IBM T.J. Watson Research, Hawthorne NY, USA. 370Sstevel@tonic-gate