diff options
Diffstat (limited to 'contrib/tcp_wrappers/CHANGES')
| -rw-r--r-- | contrib/tcp_wrappers/CHANGES | 451 |
1 files changed, 0 insertions, 451 deletions
diff --git a/contrib/tcp_wrappers/CHANGES b/contrib/tcp_wrappers/CHANGES deleted file mode 100644 index e68ee750e0150..0000000000000 --- a/contrib/tcp_wrappers/CHANGES +++ /dev/null @@ -1,451 +0,0 @@ -Request: after building the programs, please run the `tcpdchk' wrapper -configuration checker. See the `tcpdchk.8' manual page (`nroff -man' -format) for instructions. `tcpdchk' automatically identifies the most -common configuration problems, and will save you and me a lot of time. - -Changes per release 7.6 (Mar 1997) -================================== - -- Improved the anti source-routing protection. The code in version -7.5 was not as strong as it could be, because I tried to be compatible -with Linux. That was a mistake. Sorry for the inconvenience. - -- The program no longer terminates case of a source-routed connection, -making the IP-spoofing code more usable for long-running daemons. - -- When syslogging DNS hostname problems, always stop after a limited -number of characters. - -Changes per release 7.5 (Feb 1997) -================================== - -- Optionally refuse source-routed TCP connections requests altogether. -Credits to Niels Provos of Universitaet Hamburg. File: fix_options.c. - -- Support for IRIX 6 (Lael Tucker). - -- Support for Amdahl UTS 2.1.5 (Richard E. Richmond). - -- Support for SINIX 5.42 (Klaus Nielsen). - -- SCO 5 now has vsyslog() (Bill Golden). - -- Hints and tips for dealing with IRIX inetd (Niko Makila, Aaron -M Lee). - -- Support for BSD/OS (Paul Borman). - -- Support for Tandem (Emad Qawas). - -- Support for ISC (Frederick B. Cohen). - -- Workaround for UNICOS - it would choke on a setjmp() expression -(Bruce Kelly). File: hosts_access.c, tcpdchk.c. - -- Increased the level of buffer overflow paranoia when printing -unwanted IP options. File: fix_options.c. - -Changes per release 7.4 (Mar 1996) -================================== - -- IRIX 5.3 (and possibly, earlier releases, too) library routines call -the non-reentrant strtok() routine. The result is that hosts may slip -through allow/deny filters. Workaround is to not rely on the vendor's -strtok() routine (#ifdef LIBC_CALLS_STRTOK). Credits to Th. Eifert -(Aachen University) for spotting this one. This fix supersedes the -earlier workaround for a similar problem in FreeBSD 2.0. - -Changes per release 7.3 (Feb 1996) -================================== - -- More tests added to tcpdchk and tcpdmatch: make sure that the -REAL_DAEMON_DIR actually is a directory and not a regular file; -detect if tcpd recursively calls itself. - -- Edwin Kremer found an amusing fencepost error in the xgets() -routine: lines longer than BUFLEN characters would be garbled. - -- The access control routines now refuse to execute "dangerous" actions -such as `twist' when they are called from within a resident process. -This prevents you from shooting yourself into the foot with critical -systems programs such as, e.g., portmap or rpcbind. - -- Support for Unicos 8.x (Bruce Kelly). The program now closes the -syslog client socket before running the real daemon: Cray UNICOS -refuses to checkpoint processes with open network ports. - -- Support for MachTen UNIX (Albert M.C Tam). - -- Support for Interactive UNIX R3.2 V4.0 (Bobby D. Wright). - -- Support for SCO 3.2v5.0.0 OpenServer 5 (bob@odt.handy.com) - -- Support for Unixware 1.x and Unixware 2.x. The old Unixware Makefile -rule was broken. Sorry about that. - -- Some FreeBSD 2.0 libc routines call strtok() and severely mess up the -allow/deny rule processing. This is very bad. Workaround: call our own -strtok() clone (#ifdef USE_STRSEP). - -- The programs now log a warning when they detect that a non-existent -banner directory is specified. - -- The hosts_access.3 manual page used obsolete names for the RQ_* -constants. - -Changes per release 7.2 (Jan 1995) -================================== - -- Added a note to the README and manpages on using the IDENT service to -detect sequence number spoofing and other host impersonation attacks. - -- Portability: ConvexOS puts RPC version numbers before the daemon path -name (Jukka Ukkonen). - -- Portability: the AIX compiler disliked the strchr() declaration -in socket.c. I should have removed it when I included <string.h>. - -- Backwards compatibility: some people relied on the old leading dot or -trailing dot magic in daemon process names. - -- Backwards compatibility: hostname lookup remains enabled when --DPARANOID is turned off. In order to disable hostname lookups you -must turn off -DALWAYS_HOSTNAME. - -- Eliminated false complaints from the tcpdmatch/tcpdchk configuration -checking programs about process names not in inetd.conf or about KNOWN -username patterns. - -Changes per release 7.1 (Jan 1995) -================================== - -- Portability: HP-UX permits you to break inetd.conf entries with -backslash-newline. - -- Portability: EP/IX has no putenv() and some inetd.conf entries are -spread out over two lines. - -- Portability: SCO with NIS support has no *netgrent() routines. - -Changes per release 7.0 (Jan 1995) -================================== - -- Added a last-minute workaround for a Solaris 2.4 gethostbyname() -foulup with multi-homed hosts in DNS through NIS mode. - -- Added a last-minute defense against TLI weirdness: address lookups -apparently succeed but the result netbuf is empty (ticlts transport). - -- Dropped several new solutions that were in need of a problem. Beta -testers may recognize what new features were kicked out during the last -weeks before release 7.0 came out. Such is life. - -- Got rid of out the environment replacement routines, at least for -most architectures. One should not have to replace working system -software when all that is needed is a 4.4BSD setenv() emulator. - -- By popular request I have added an option to send banner messages to -clients. There is a Banners.Makefile that gives some aid for sites that -are going to use this feature. John C. Wingenbach did some pioneering -work here. I used to think that banners are frivolous. Now that I had -a personal need for them I know that banners can be useful. - -- At last: an extensible functional interface to the pattern matching -engine. request_init() and request_set() accept a variable-length -name-value argument list. The result can be passed to hosts_access(). - -- When PARANOID mode is disabled (compile time), the wrapper does no -hostname lookup or hostname double checks unless required by %letter -expansions, or by access control rules that match host names. This is -useful for sites that don't care about internet hostnames anyway. -Inspired by the authors of the firewalls and internet security book. - -- When PARANOID mode is disabled (compile time), hosts with a name/name -or name/address conflict can be matched with the PARANOID host wildcard -pattern, so that you can take some intelligent action instead of just -dropping clients. Like showing a banner that explains the problem. - -- New percent escapes: %A expands to the server address; %H expands to -the corresponding hostname (or address if no name is available); %n and -%N expand to the client and server hostname (or "unknown"); %s expands -to everything we know about the server endpoint (the opposite of the %c -sequence for client information). - -- Symmetry: server and client host information is now treated on equal -footing, so that we can reuse a lot of code. - -- Lazy evaluation of host names, host addresses, usernames, and so on, -to avoid doing unnecessary work. - -- Dropping #ifdefs for some archaic systems made the code simpler. - -- Dropping the FAIL pattern made the pattern matcher much simpler. Run -the "tcpdchk" program to scan your access control files for any uses of -this obscure language feature. - -- Moving host-specific pattern matching from string_match() to the -host_match() routine made the code more accurate. Run the "tcpdchk" -program to scan your access control files for any dependencies on -undocumented or obscure language features that are gone. - -- daemon@host patterns trigger on clients that connect to a specific -internet address. This can be useful for service providers that offer -multiple ftp or www archives on different internet addresses, all -belonging to one and the same host (www.foo.com, ftp.bar.com, you get -the idea). Inspired by a discussion with Rop Gonggrijp, Cor Bosman, -and Casper Dik, and earlier discussions with Adrian van Bloois. - -- The new "tcpdchk" program critcizes all your access control rules and -inetd.conf entries. Great for spotting obscure bugs in my own hosts.xxx -files. This program also detects hosts with name/address conflicts and -with other DNS-related problems. See the "tcpdchk.8" manual page. - -- The "tcpdmatch" program replaces the poor old "try" command. The new -program looks in your inetd.conf file and therefore produces much more -accurate predictions. In addition, it detects hosts with name/address -conflicts and with other DNS-related problems. See the "tcpdmatch.8" -manual page. The inetd.conf lookup was suggested by Everett F Batey. - -- In the access control tables, the `=' between option name and value -is no longer required. - -- Added 60-second timeout to the safe_finger command, to cover another -potential problem. Suggested by Peter Wemm. - -- Andrew Maffei provided code that works with WIN-TCP on NCR System V.4 -UNIX. It reportedly works with versions 02.02.01 and 02.03.00. The code -pops off all streams modules above the device driver, pushes the timod -module to get at the peer address, and then restores the streams stack -to the initial state. - -Changes per release 6.3 (Mar 1994) -================================== - -- Keepalives option, to get rid of stuck daemons when people turn off -their PC while still connected. Files: options.c, hosts_options.5. - -- Nice option, to calm down network daemons that take away too much CPU -time. Files: options.c, hosts_options.5. - -- Ultrix perversion: the environ global pointer may be null. The -environment replacement routines now check for this. File: environ.c. - -- Fixed a few places that still assumed the socket is on standard -input. Fixed some error messages that did not provide access control -file name and line number. File: options.c. - -- Just when I was going to release 6.2 I received code for Dynix/PTX. -That code is specific to PTX 2.x, so I'll keep around my generic -PTX code just in case. The difference is in the handling of UDP -services. Files: tli_sequent.[hc]. - -Changes per release 6.2 (Feb 1994) -================================== - -- Resurrected my year-old code to reduce DNS load by appending a dot to -the gethostbyname() argument. This feature is still experimental and it -may go away if it causes more problems than it solves. File: socket.c. - -- Auxiliary code for the Pyramid, BSD universe. Karl Vogel figured out -what was missing: yp_get_default_domain() and vfprintf(). Files: -workarounds.c, vfprintf.c. - -- Improved support for Dynix/PTX. The wrapper should now be able to -deal with all TLI over IP services. File: ptx.c. - -- The try command now uses the hostname that gethostbyaddr() would -return, instead of the hostname returned by gethostbyname(). This can -be significant on systems with NIS that have short host names in the -hosts map. For example, gethostbyname("wzv.win.tue.nl") returns -"wzv.win.tue.nl"; gethostbyaddr(131.155.210.17) returns "wzv", and -that is what we should test with. File: try.c. - -Changes per release 6.1 (Dec 1993) -================================== - -- Re-implemented all environment access routines. Most systems have -putenv() but no setenv(), some systems have setenv() but no putenv(), -and there are even systems that have neither setenv() nor putenv(). The -benefit of all this is that more systems can now be treated in the same -way. File: environ.c. - -- Workaround for a weird problem with DG/UX when the wrapper is run as -nobody (i.e. fingerd). For some reason the ioctl(fd, I_FIND, "sockmod") -call fails even with socket-based applications. The "fix" is to always -assume sockets when the ioctl(fd, I_FIND, "timod") call fails. File: -fromhost.c. Thanks to Paul de Vries (vries@dutentb.et.tudelft.nl) for -helping me to figure out this one. - -- Implemented a workaround for Dynix/PTX and other systems with TLI -that lack some essential support routines. Thanks to Bugs Brouillard -(brouill@hsuseq.humboldt.edu) for the hospitality to try things out. -The trick is to temporarily switch to the socket API to identify the -client, and to switch back to TLI when done. It still does not work -right for basic network services such as telnet. File: fromhost.c. - -- Easy-to-build procedures for SCO UNIX, ConvexOS with UltraNet, EP/IX, -Dynix 3.2, Dynix/PTX. File: Makefile. - -- Variable rfc931 timeout. Files: rfc931.c, options.c, log_tcp.h, try.c. - -- Further simplification of the rfc931 code. File: rfc931.c. - -- The fromhost() interface stinks: I cannot change that, but at least -the from_sock() and from_tli() functions now accept a file descriptor -argument. - -- Fixed a buglet: fromhost() would pass a garbage file descriptor to -the isastream() call. - -- On some systems the finger client program lives in /usr/bsd. File: -safe_finger.c. - -Changes per release 6.0 (Sept 1993) -=================================== - -- Easy build procedures for common platforms (sun, ultrix, aix, hpux -and others). - -- TLI support, System V.4 style (Solaris, DG/UX). - -- Username lookup integrated with the access control language. -Selective username lookups are now the default (was: no username -lookups). - -- A safer finger command for booby traps. This one solves a host of -possible problems with automatic reverse fingers. Thanks, Borja Marcos -(borjam@we.lc.ehu.es) for some inspiring discussions. - -- KNOWN pattern that matches hosts whose name and address are known. - -- Cleanup of diagnostics. Errors in access-control files are now shown -with file name and line number. - -- With AIX 3.2, hostnames longer than 32 would be truncated. This -caused hostname verification failures, so that service would be refused -when paranoid mode was enabled. Found by: Adrian van Bloois -(A.vanBloois@info.nic.surfnet.nl). - -- With some IRIX versions, remote username lookups failed because the -fgets() library function does not handle partial read()s from sockets. -Found by: Daniel O'Callaghan (danny@austin.unimelb.edu.au). - -- Added a DISCLAIMER document to help you satisfy legal departments. - -The extension language module has undergone major revisions and -extensions. Thanks, John P. Rouillard (rouilj@ra.cs.umb.edu) for -discussions, experiments, and for being a good guinea pig. The -extensions are documented in hosts_options.5, and are enabled by -editing the Makefile STYLE macro definition. - -- (Extension language) The ":" separator may now occur within options -as long as it is protected with a backslash. A warning is issued when -a rule ends on ":". - -- (Extension language) Better verification mode. When the `try' command -is run, each option function now explains what it would do. - -- (Extension language) New "allow" and "deny" keywords so you can now -have all rules within a single file. See "nroff -man hosts_options.5" -for examples. - -- (Extension language) "linger" keyword to set the socket linger time -(SO_LINGER). From: Marc Boucher <marc@cam.org>. - -- (Extension language) "severity" keyword to turn the logging noise up -or down. Many sites wanted a means to shut up the program; other sites -wanted to emphasize specific events. Adapted from code contributed -by Dave Mitchell <D.Mitchell@dcs.shef.ac.uk>. - -Changes per release 5.1 (Mar 1993) -================================== - -- The additional protection against source-routing attacks from hosts -that pretend to have someone elses network address has become optional -because it causes kernel panics with SunOS <= 4.1.3. - -Changes per release 5.0 (Mar 1993) -================================== - -- Additional protection against source-routing attacks from hosts that -pretend to have someone elses network address. For example, the address -of a trusted host within your own network. - -- The access control language has been extended with a simple but -powerful operator that greatly simplifies the design of rule sets (ALL: -.foo.edu EXCEPT dialup.foo.edu). Blank lines are permitted, and long -lines can be continued with backslash-newline. - -- All configurable stuff, including path names, has been moved into the -Makefile so that you no longer have to hack source code to just -configure the programs. - -- Ported to Solaris 2. TLI-based applications not yet supported. -Several workarounds for System V bugs. - -- A small loophole in the netgroup lookup code was closed, and the -remote username lookup code was made more portable. - -- Still more documentation. The README file now provides tutorial -sections with introductions to client, server, inetd and syslogd. - -Changes per release 4.3 (Aug 1992) -================================== - -- Some sites reported that connections would be rejected because -localhost != localhost.domain. The host name checking code now -special-cases localhost (problem reported by several sites). - -- The programs now report an error if an existing access control file -cannot be opened (e.g. due to lack of privileges). Until now, the -programs would just pretend that the access control file does not exist -(reported by Darren Reed, avalon@coombs.anu.edu.au). - -- The timeout period for remote userid lookups was upped to 30 seconds, -in order to cope with slow hosts or networks. If this is too long for -you, adjust the TIMEOUT definition in file rfc931.c (problem reported -by several sites). - -- On hosts with more than one IP network interface, remote userid -lookups could use the IP address of the "wrong" local interface. The -problem and its solution were discussed on the rfc931-users mailing -list. Scott Schwartz (schwartz@cs.psu.edu) folded the fix into the -rfc931.c module. - -- The result of % expansion (in shell commands) is now checked for -stuff that may confuse the shell; it is replaced by underscores -(problem reported by Icarus Sparry, I.Sparry@gdr.bath.ac.uk). - -- A portability problem was fixed that caused compile-time problems -on a CRAY (problem reported by Michael Barnett, mikeb@rmit.edu.au). - -Changes per release 4.0 (Jun 1992) -================================== - -1 - network daemons no longer have to live within a common directory -2 - the access control code now uses both the host address and name -3 - an access control pattern that supports netmasks -4 - additional protection against forged host names -5 - a pattern that matches hosts whose name or address lookup fails -6 - an operator that prevents hosts or services from being matched -7 - optional remote username lookup with the RFC 931 protocol -8 - an optional umask to prevent the creation of world-writable files -9 - hooks for access control language extensions -10 - last but not least, thoroughly revised documentation. - -Changes per release 3.0 (Oct 1991) -================================== - -Enhancements over the previous release are: support for datagram (UDP -and RPC) services, and execution of shell commands when a (remote host, -requested service) pair matches a pattern in the access control tables. - -Changes per release 2.0 (May 1991) -================================== - -Enhancements over the previous release are: protection against rlogin -and rsh attacks through compromised domain name servers, optional -netgroup support for systems with NIS (formerly YP), and an extension -of the wild card patterns supported by the access control files. - -Release 1.0 (Jan 1991) |