grepcidr can be used to filter a list of IP addresses against one or more Classless Inter-Domain Routing (CIDR) specifications, or arbitrary networks specified by an address range. As with grep, there are options to invert matching and load patterns from a file. grepcidr is capable of comparing thousands or even millions of IPs to networks with little memory usage and in reasonable computation time. It has endless uses in network software, including mail filtering and processing, network security, log analysis, and many custom applications.
renattach is a stream filter that can identify and act upon potentially dangerous e-mail attachments. It's a highly effective way of protecting users from harmful mail content (virii and worms) by disabling or removing attachments that may be accidentally executed by the user. It is written in pure C and can quickly process mail with little overhead. Unlike a conventional virus scanner, there are no specific virus or worm definitions. Instead, it identifies potentially dangerous attachments based on filename extension and on encoded body content. It can be used from within sendmail, postfix, procmail, or pretty much anywhere else.
SpamTestBuddy is a simple, light-weight, multiple-input spam scoring tool. It is standalone and can be used with simple procmail rules without root access or daemons. It features built-in support for simple DNS checks including DNSBL (DNS-based blocklist) queries, and can scan headers from filters such as SpamProbe, QSF, DSPAM. The configuration is flexible and easy to edit in a human readable file. Different tests can add or remove from the total score. You might think of SpamTestBuddy as a very light version of SpamAssassin.
Extracting sender's IP address I wanted to add that the connecting SMTP server's IP address (as found in the Received headers) is automatically parsed by SpamTestBuddy, so instead of using ...
Re: Works beautifully, hope to use in a student guide And here is that illustrated tutorial I was talking about earlier, with screen shots: http://www.sysdesign.ca/guides/unixdev/ (http://www.s...
Works beautifully, hope to use in a student guide I have been using joe ever since I discovered it within the Slackware Linux (http://www.slackware.com/) distro, and among the various editors I ha...
Security fixes in renattach 1.2.1e Please see this notice, as sent out on the renattach mailing list: http://www.pc-tools.net/unix/renattach/2004-10-03.txt (http://www.pc-tools.net/unix/renattac...
1.2.0rc2 corrects all known issues to date I would like to announce 1.2.0rc2. All known bugs have been fixed. No new features are planned for 1.2.0. Thanks to all who submitted live worms/viruses; ...