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<body class='hmmessage'><div dir='ltr'>Greetings.<br><br>I don't quite understand the broadcast flag, however I did encounter the "taking a very long time to obtain an IP" problem.<br><br>I'm on Windows 10. Router has dnsmasq 2.75.<br><br>During Windows booting process, its firewall would deny any unicast packet from outside its own subnet, that including DHCP. Windows would try to request DHCP, then deny the reply, a few times.<br><br>Solution is asking Windows to request a DHCP reply via broadcast: <a href="http://sysadministrivia.blogspot.jp/2011/04/dhcp-broadcast-flag-problem-with-dhcp.html" target="_blank">http://sysadministrivia.blogspot.jp/2011/04/dhcp-broadcast-flag-problem-with-dhcp.html</a><br><br>Wish this help.<br><br><br>五月<br>2016.4<br><br><div><hr id="stopSpelling">From: weiqiang_li@hotmail.com<br>To: dnsmasq-discuss@lists.thekelleys.org.uk<br>Date: Fri, 1 Apr 2016 02:38:30 +0000<br>Subject: [Dnsmasq-discuss] dnsmasq does not respect BOOTP's broadcast flag<br><br>
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<div dir="ltr"><div style="line-height:21.3px;color:rgb(68, 68, 68);font-family:'Microsoft YaHei UI', 'Microsoft YaHei', 宋体, Calibri, sans-serif;font-size:15px;background-color:rgb(255, 255, 255);"><span style="line-height:22.72px;font-size:12pt;">Dear all,</span></div><div style="line-height:21.3px;color:rgb(68, 68, 68);font-family:'Microsoft YaHei UI', 'Microsoft YaHei', 宋体, Calibri, sans-serif;font-size:15px;background-color:rgb(255, 255, 255);"><span style="line-height:22.72px;font-size:12pt;"> I got a router using dnsmasq-2.66 for DHCP services, and I encountered a bug that the dnsmasq server does not respond to my PC's DHCPREQUEST( normally it should respond with a DHCPNAK? ), so it takes an obvious long time to got a new IP for my PC. </span></div><div id="ecxinlineImage0" style="display:inline-block;"> <span> </span> <div style="display:inline-block;" unselectable="on" class="ecxinlineImage"><img src="cid:inlineImage0" height="313" width="1020"></div> <span> </span></div><div style="line-height:21.3px;color:rgb(68, 68, 68);font-family:'Microsoft YaHei UI', 'Microsoft YaHei', 宋体, Calibri, sans-serif;font-size:15px;background-color:rgb(255, 255, 255);"><span style="font-size:12pt;line-height:22.72px;"> So, is this really a bug or it is just something wrong with my PC(Works well with other DHCP server)? At my first thought, I think it should be a bug that has been solved, so I reviewed the latest(ver.2.75) dnsmasq source code, however, neither did it care about this flag.</span></div><div style="line-height:21.3px;color:rgb(68, 68, 68);font-family:'Microsoft YaHei UI', 'Microsoft YaHei', 宋体, Calibri, sans-serif;font-size:15px;background-color:rgb(255, 255, 255);"><span style="font-size:12pt;line-height:22.72px;"> I also attached a patch for this. </span></div> </div>
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