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- From: wietse@wzv.win.tue.nl (Wietse Venema)
- Newsgroups: comp.security.misc,alt.security,comp.unix.admin,comp.sys.sun.admin
- Subject: new tcp wrappers and related stuff
- Message-ID: <3424@wzv.win.tue.nl>
- Date: 21 Jun 92 22:14:27 GMT
- Organization: Eindhoven University of Technology, The Netherlands
-
- A new release of the tcp wrapper programs is available. These programs
- maintain a log of the use of TCP/IP and UDP/IP network daemons, and
- provide optional access control.
-
- The source has been posted to comp.sources.misc and is available for
- anonymous ftp as ftp.win.tue.nl:/pub/security/log_tcp.shar.Z.
-
- Enhancements over the previous release are:
-
- 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 (DNS spoofing)
- 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.
-
- Except for the change described under (2) the present version should be
- backwards compatible with earlier ones.
-
- The logdaemon package (SunOS 4.x rsh/rlogin daemons that log user names
- in addition to host names) has been updated to take advantage of the
- above access control language extensions. The documentation and the
- installation instructions have been completely revised. Available for
- anon ftp as ftp.win.tue.nl:/pub/security/logdaemon.tar.Z. The rshd
- works with Ultrix 4.x, too. These programs have already survived their
- first cracker attacks :-)
-
- Finally, a new portmap replacement is available for testing. It uses
- the same access control mechanisms as the tcp wrappers and should
- improve the security of systems with naive NFS or NIS implementations
- (i.e. not SunOS 4.x; use securelib and patch 100482-02 instead for even
- better protection). You probably have a naive NFS or NIS implementation
- if rpcinfo says that all those daemons run on port numbers >= 1024. It
- works with Ultrix 4.x, and an update for HP-UX is in the works.
- Available for anon ftp as ftp.win.tue.nl:/pub/security/portmap.shar.Z.
-
- Wietse
-
-