Dec 17 2012

Client-IP-Detector: a new WordPress Widget to show Client IP.

A new simple IP detector widget for WordPress (named client-ip-detector) to show if user is connecting with IPv6 or IPv4 has born and has been written by me.

Using this Plugin, IPv4 Address will be marked in RED while IPv6 ones will me marked in GREEN (this feature has to be enabled in the widget admin panel), to remember the reached availability limits of v4 Protocols.

Statistics on IPv6 and IPv4 usage (percentage) are available and can be printed-out.

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Oct 24 2012

Count and Visualize Traffic Sources (by IP) using shell commands in Linux.

While suspecting to be victim of a DoS or DDoS Attack, could be useful to identify TOP Source of Connections.
This information can be retreived “On-The-Fly” by using some shell commands.
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Dec 15 2011

6to4: A simple Overview.

“6to4 is an Internet transition mechanism for migrating from IPv4 to IPv6, a system that allows IPv6 packets to be transmitted over an IPv4 network (generally the IPv4 internet) without the need to configure explicit tunnels.

Special relay servers are also in place that allow 6to4 networks to communicate with native IPv6 networks.

6to4 is especially relevant during the initial phases of deployment to full, native IPv6 connectivity, since IPv6 is not required on nodes between the host and the destination. However, it is intended only as transition mechanism and is not meant to be used permanently.” (Wikipedia)
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Nov 2 2011

Arpwatch setup in Ubuntu

Arpwatch keeps track for Ethernet/IP Address pairings.

It can store activity via syslog and reports pairing changes via eMail too.
Arpwatch uses pcap to listen for ARP packets on local ethernet interfacs.

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May 10 2011

IPv4 & IPv6 Prefix Reference Charts

Some paper I often use to check Prefix-Length and NetMasks.

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