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<p class="MsoNormal">After an incident we have been tasked with detecting rogue DHCP servers on our network. Looking at the check_dhcp plugin it looks like it does 99% of what we need. My specific question relates to us making a change to the check_dhcp.c file
and if it would work. My co-worker and I are not familiar enough with the language.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">For the section:<o:p></o:p></p>
<p class="MsoNormal"> if(valid_responses==0)<o:p></o:p></p>
<p class="MsoNormal"> result=STATE_CRITICAL;<o:p></o:p></p>
<p class="MsoNormal"> else if(requested_servers>0 && requested_responses==0)<o:p></o:p></p>
<p class="MsoNormal"> result=STATE_CRITICAL;<o:p></o:p></p>
<p class="MsoNormal"> else if(requested_responses<requested_servers)<o:p></o:p></p>
<p class="MsoNormal"> result=STATE_WARNING;<o:p></o:p></p>
<p class="MsoNormal"> else if(request_specific_address==TRUE && received_requested_address==FALSE)<o:p></o:p></p>
<p class="MsoNormal"> result=STATE_WARNING;<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If we were to add this after the first if<o:p></o:p></p>
<p class="MsoNormal"> Else if (valid_responses>1)<o:p></o:p></p>
<p class="MsoNormal"> Result=STATE_CRITICAL;<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Then compile the plugin per the github instructions from there would that alert if we had more than one DHCP response?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Arial",sans-serif;color:black">Regards,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Arial",sans-serif"><img width="80" height="80" style="width:.8333in;height:.8333in" id="Picture_x0020_1" src="cid:image002.png@01D44A9B.3F2877B0" alt="Aaron Webber"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.5pt;font-family:"Arial",sans-serif">Aaron Webber</span></b><span style="font-size:10.5pt;font-family:"Arial",sans-serif"> | Security Systems Engineer<o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:7.5pt;font-family:"Arial",sans-serif"><a href="mailto:awebber@insidesales.com"><span style="color:blue">awebber@insidesales.com</span></a> | P: 877.210.0126 | F: 801.853.4089</span></b><span style="font-size:7.5pt;font-family:"Arial",sans-serif"><o:p></o:p></span></p>
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Testimonials</span></a> | <a href="https://www.youtube.com/user/officialinsidesales"><span style="color:blue">Sales Rep Best Practices</span></a><o:p></o:p></span></p>
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