IPwatchD an IP conflict detection tool for Linux

Posted by linuxer on Aug 12, 2009 7:34 AM EDT
linuxconfig.org; By Jaroslav Imrich
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When using a GNU/Linux operating system, from time to time you may come across a situation where network connectivity was interrupted due to the IP conflict. An IP conflict event occurs when two or more hosts on the same network are configured with identical IP addresses. At the present, there appears to be no code in the Linux kernel to take care of this situation by means of appropriate Gratuitous ARP response . Very often a network administrator is left in the complete ignorance by the Linux kernel and needs to troubleshoot IP conflict the hard way. Fortunately, there is a simple daemon called IPwatchD which main purpose is to catch and evaluate packets on the network and this way is able to prevent an IP conflict occurrence. This is done by help of libpcap library. IPwatchD daemon is written in C language and can run in passive or active modes.

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