Network
The Apps for the .NET;)
Spam- & Worm Filter
SpamAssassin (SA) analyses each email if it does look like spam-email using the script language Perl. SA rates the email in several ways and return a positive number for spam and a negative number for non-spam and then adds up each rating. if this sum is greater then a defined value, SA says that this email is spam. SA lists the several ratings in the email. Additionally, SA can use a Bayesian classifier to improve the spam recognition.
SA has been written to work with a MTA and does its work for providers or enterprises.
In September of 2003 a several emails a day including the worms Swen and Gibe wanted to fill my mailbox, each with a size of 147 kB! Since I could not download them, I used Mailfilter to delete these emails on the server using regex.
SpamAssassin [en]
Mailfilter [en]
Heise news about Swen/Gibe [de]
Network Monitor
EtherApe displays the network activity graphically: Active hosts are shown as circles of varying size, and traffic among them is shown as lines of varying width. EtherApe does also display the port number that is used for the traffic.
News Server
Leafnode is well suited for users that are not subscribed to that many newsgroups and have limited bandwidth. You can configure it easily and define several newsservers. It does not need any maintenance and does not fetch a newsgroups that is not read. Leafnode looks each time for new newsgroups and also display all the newsgroups locally.
Homepage Synchronisator
Sitecopy is a small but very useful program for all homepage owners. It mirrors all the files of a dedicated directory using FTP, HTTP or the oder WebDAV-protocol to the emote server: E.g. if you add some files, they are also added to the remote site. Thus, you can concentrate on developing your homepage locally and then just upload it.
