Here’s a small utility to send net send messages to recipients by IP block avoiding broadcast/multicast.
Usage: netsend.pl --iptype={subnet|address} [--verbose] <address|subnet>
Please fill subnet in form of CIDR : X.X.X.X/XX
At the end of the run it gives a summary of Ips delivered/failed. I have created it to overcome one problem in an environment where messages to users were sent via net send ( manually ! ).
Since I was at it, CGI interface is included as well.
As I think of it, this may be used as footprinting workstations being able to receive the messages. I should try that next time 
P.S. I cannot upload tarball 
So I have scanned 3 files:
Netsend.pl netsend.pl
Netsend.cgi netsend.cgi and
Netsend.lgr netsend.lgr in PDF format.
