Replacement portmapper with access control. Makes it somewhat harder to attack your RPC daemons, for example to steal YP password maps or NFS file handles. Must be linked against a library produced with a recent tcp wrapper release (see above). Tested with SunOS 4.1.x. Also supports HP-UX 9.0, AIX 3.x (bsdcc compiler with -D_SUN), AIX 4.x and Digital UNIX (OSF/1). If you run SunOS 4, the securelib library (see above) is better because it can also cope wit h direct attacks on your RPC daemons (i.e. attacks without assistance from portmap).
You can download it from the following link: https://packetstormsecurity.com/files/download/12810/portmap_4.tar.gz
Source: https://packetstormsecurity.com/files/12810/portmap_4.tar.gz.html