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<p class="MsoNormal">Let me preface by saying that I’ve been using dnsmasq for a couple of years, without known problems until today.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Today, after having been away for a week, I tried to connect with an internal server as I’ve done many, many times, but DNS lookup failed.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So, on the server that’s running dnsmasq, I typed (where m1330c is the server in question), and the response was:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">> Server: 127.0.0.1<o:p></o:p></p>
<p class="MsoNormal">> Address: 127.0.0.1#53<o:p></o:p></p>
<p class="MsoNormal">> <o:p></o:p></p>
<p class="MsoNormal">> Non-authoritative answer:<o:p></o:p></p>
<p class="MsoNormal">> *** Can’t find m1330c: No answer<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Now, let me point out that m1330c has a wireless interface and a wired interface. And both of these are specified in the dnsmasq.conf with preferred addresses, in the format:
<o:p></o:p></p>
<p class="MsoNormal">dhcp-host=11:22:33:44:55:66,m1330c,192.168.0.6<o:p></o:p></p>
<p class="MsoNormal">dhcp-host=11:22:33:44:55:67,m1330cw,192.168.0.7<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I get the same nslookup response for m1330cw<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Upon review of the messages log, I found that different addresses are being assigned (.14 and .15, respectively)… and not only that, but the assignment is being made every 50-some seconds.
<o:p></o:p></p>
<p class="MsoNormal"><br>
This has been set-it-and-forget-it for me, and I don’t remember a lot of the details I went through for the initial configuration, but I do know that it was working, and now has stopped, but without configuration changes. A reboot of the server running dnsmasq
did not resolve the issue.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">There are a few devices on the network. Three have hard-coded addresses (in /etc/hosts), and nslookup shows accurate information for them. Those with DHCP-based addresses all return “can’t find …” messages.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Final bit of information: It appears that the repeat-ip-serving for m1330c/w has been going on for months, but did not seem to impact operation. But it seems to happen only to these two interfaces (a Windows 7 server, but not the only
one in the net).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">To summarize:<br>
<br>
nslookup does not return IP address of DHCP-based servers<o:p></o:p></p>
<p class="MsoNormal">“dhcp-host” entries in /etc/dnsmasq.conf are ignored, or at least are not as expected<o:p></o:p></p>
<p class="MsoNormal">Repeated assignment of IP address to two interfaces<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Following are the messages from dnsmasq since time of boot. What might I be missing?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Oct 8 10:46:46 stora-1 dnsmasq[2046]: started, version 2.62 cachesize 150<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:46:46 stora-1 dnsmasq[2046]: compile time options: IPv6 GNU-getopt no-DBus no-i18n no-IDN DHCP DHCPv6 no-Lua TFTP no-conntrack<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:46:46 stora-1 dnsmasq-dhcp[2046]: DHCP, IP range 192.168.0.10 -- 192.168.0.109, lease time 7d<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:46:46 stora-1 dnsmasq-tftp[2046]: TFTP root is /home/tftpd
<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:46:46 stora-1 dnsmasq[2046]: reading /etc/resolv.conf<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:46:46 stora-1 dnsmasq[2046]: using nameserver 65.32.5.112#53<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:46:46 stora-1 dnsmasq[2046]: using nameserver 65.32.5.111#53<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:46:46 stora-1 dnsmasq[2046]: read /etc/hosts - 258 addresses<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:46:58 stora-1 dnsmasq[2046]: reading /etc/resolv.conf<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:46:58 stora-1 dnsmasq[2046]: using nameserver 65.32.5.112#53<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:46:58 stora-1 dnsmasq[2046]: using nameserver 65.32.5.111#53<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:46:58 stora-1 dnsmasq[2046]: ignoring nameserver 127.0.0.1 - local interface<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:47:35 stora-1 dnsmasq-dhcp[2046]: DHCPINFORM(eth0) 192.168.0.14 00:21:9b:cb:e6:dd
<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:47:35 stora-1 dnsmasq-dhcp[2046]: DHCPACK(eth0) 192.168.0.14 00:21:9b:cb:e6:dd M1330C<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:47:35 stora-1 dnsmasq-dhcp[2046]: DHCPINFORM(eth0) 192.168.0.15 00:21:5c:6a:03:ef
<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:47:35 stora-1 dnsmasq-dhcp[2046]: DHCPACK(eth0) 192.168.0.15 00:21:5c:6a:03:ef m1330cw<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:48:35 stora-1 dnsmasq-dhcp[2046]: DHCPINFORM(eth0) 192.168.0.14 00:21:9b:cb:e6:dd
<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:48:35 stora-1 dnsmasq-dhcp[2046]: DHCPACK(eth0) 192.168.0.14 00:21:9b:cb:e6:dd M1330C<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:48:36 stora-1 dnsmasq-dhcp[2046]: DHCPINFORM(eth0) 192.168.0.15 00:21:5c:6a:03:ef
<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:48:36 stora-1 dnsmasq-dhcp[2046]: DHCPACK(eth0) 192.168.0.15 00:21:5c:6a:03:ef m1330cw<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:49:37 stora-1 dnsmasq-dhcp[2046]: DHCPINFORM(eth0) 192.168.0.14 00:21:9b:cb:e6:dd
<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:49:37 stora-1 dnsmasq-dhcp[2046]: DHCPACK(eth0) 192.168.0.14 00:21:9b:cb:e6:dd M1330C<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:49:37 stora-1 dnsmasq-dhcp[2046]: DHCPINFORM(eth0) 192.168.0.15 00:21:5c:6a:03:ef
<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:49:37 stora-1 dnsmasq-dhcp[2046]: DHCPACK(eth0) 192.168.0.15 00:21:5c:6a:03:ef m1330cw<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:50:41 stora-1 dnsmasq-dhcp[2046]: DHCPINFORM(eth0) 192.168.0.14 00:21:9b:cb:e6:dd
<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:50:41 stora-1 dnsmasq-dhcp[2046]: DHCPACK(eth0) 192.168.0.14 00:21:9b:cb:e6:dd M1330C<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:50:41 stora-1 dnsmasq-dhcp[2046]: DHCPINFORM(eth0) 192.168.0.15 00:21:5c:6a:03:ef
<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:50:41 stora-1 dnsmasq-dhcp[2046]: DHCPACK(eth0) 192.168.0.15 00:21:5c:6a:03:ef m1330cw<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:51:42 stora-1 dnsmasq-dhcp[2046]: DHCPINFORM(eth0) 192.168.0.14 00:21:9b:cb:e6:dd
<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:51:42 stora-1 dnsmasq-dhcp[2046]: DHCPACK(eth0) 192.168.0.14 00:21:9b:cb:e6:dd M1330C<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:51:42 stora-1 dnsmasq-dhcp[2046]: DHCPINFORM(eth0) 192.168.0.15 00:21:5c:6a:03:ef
<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:51:42 stora-1 dnsmasq-dhcp[2046]: DHCPACK(eth0) 192.168.0.15 00:21:5c:6a:03:ef m1330cw<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:53:35 stora-1 dnsmasq-dhcp[2046]: DHCPINFORM(eth0) 192.168.0.14 00:21:9b:cb:e6:dd
<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:53:35 stora-1 dnsmasq-dhcp[2046]: DHCPACK(eth0) 192.168.0.14 00:21:9b:cb:e6:dd M1330C<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:53:35 stora-1 dnsmasq-dhcp[2046]: DHCPINFORM(eth0) 192.168.0.15 00:21:5c:6a:03:ef
<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:53:35 stora-1 dnsmasq-dhcp[2046]: DHCPACK(eth0) 192.168.0.15 00:21:5c:6a:03:ef m1330cw<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:54:36 stora-1 dnsmasq-dhcp[2046]: DHCPINFORM(eth0) 192.168.0.14 00:21:9b:cb:e6:dd
<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:54:36 stora-1 dnsmasq-dhcp[2046]: DHCPACK(eth0) 192.168.0.14 00:21:9b:cb:e6:dd M1330C<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:54:37 stora-1 dnsmasq-dhcp[2046]: DHCPINFORM(eth0) 192.168.0.15 00:21:5c:6a:03:ef
<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:54:37 stora-1 dnsmasq-dhcp[2046]: DHCPACK(eth0) 192.168.0.15 00:21:5c:6a:03:ef m1330cw<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:55:37 stora-1 dnsmasq-dhcp[2046]: DHCPINFORM(eth0) 192.168.0.14 00:21:9b:cb:e6:dd
<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:55:37 stora-1 dnsmasq-dhcp[2046]: DHCPACK(eth0) 192.168.0.14 00:21:9b:cb:e6:dd M1330C<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:55:41 stora-1 dnsmasq-dhcp[2046]: DHCPINFORM(eth0) 192.168.0.15 00:21:5c:6a:03:ef
<o:p></o:p></p>
<p class="MsoNormal">Oct 8 10:55:41 stora-1 dnsmasq-dhcp[2046]: DHCPACK(eth0) 192.168.0.15 00:21:5c:6a:03:ef m1330cw<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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