Hi, Here is a nifty little monitoring utility with a clean GUI interface that is a drop-in, low-overhead monitoring web dashboard for a linux machine. Monitors your server with stats…

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Identifying PHP Spam

To identify PHP Spam when running PHP 5.3 or higher: (Please note the variables below are not enabled by default in php.ini) utilize the following php.ini variable to narrow down the offending script.

If you suspect there is a PHP script sending out email (and it is still doing so) try adding these two lines:

mail.add_x_header = On
mail.log = /var/log/php_mail.log

to the [mail] section of:



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CIDR Notation

CIDR stands for Classless Inter-Domain Routing. CIDR was developed in the 1990s as a standard scheme for routing network traffic across the Internet.

/27      1/8th of a Class C     32 hosts
/26      1/4th of a Class C     64 hosts
/25      1/2 of a Class C       128 hosts
/24      1 Class C              256 hosts
/23      2 Class C              512 hosts
/22      4 Class C              1,024 hosts
/21      8 Class C              2,048 hosts
/20      16 Class C             4,096 hosts
/19      32 Class C             8,192 hosts
/18      64 Class C             16,384 hosts
/17      128 Class C            32,768 hosts
/16      256 Class C            65,536 hosts (= 1 Class B)
/15      512 Class C            131,072 hosts
/14      1,024 Class C          262,144 hosts
/13      2,048 Class C          524,288 hosts


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darkstat is an ntop-workalike network statistics gatherer. It runs as a background process on a cable or DSL router, uses libpcap to capture network traffic, and has a Web interface that serves up reports of statistics such as data transferred by host, port, and protocol. It also has a neat bandwidth usage graph.


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