<div dir="ltr"><div><span class="gmail-im" style="color:rgb(80,0,80)"><br></span><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">First, answer a simple question the answer to which I may have missed.<br>Is dnsmasq logging the receipt of DHCPDISCOVER messages? Can we see the<br>whole log showing that?</blockquote></div><div><br></div><div>Based on the config I provided at the initial message, I have the log file writing to /var/log/dnsmasq.log. This is the whole content of that file:</div><div><br></div>root@dns:~# cat /var/log/dnsmasq.log<br>Apr 16 15:36:50 dnsmasq[1695]: started, version 2.80 DNS disabled<br>Apr 16 15:36:50 dnsmasq[1695]: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotify dumpfile<br>Apr 16 15:36:50 dnsmasq-dhcp[1695]: DHCP, IP range 192.168.1.3 -- 192.168.1.8, lease time 12h<br><div><br></div><div>No mention of the DHCPDiscover being acknowledged.</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">The next stage is to run dnsmasq under strace (check back here if you<br>need instructions on that) and see what system calls it's making.</blockquote><div><br></div><div>What command would I need to run for this? And what service is best to upload the strace result, pastebin?</div><div><br></div><div>Thanks,<br>Josh </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, 16 Apr 2020 at 12:49, Simon Kelley <<a href="mailto:simon@thekelleys.org.uk">simon@thekelleys.org.uk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
<br>
On 15/04/2020 19:27, Josh H wrote:<br>
<br>
> It's difficult for me to share the config outright as I'm using a<br>
> modified version of netkit that I've updated to a much newer kernel<br>
> - <a href="http://netkit-ng.github.io/" rel="noreferrer" target="_blank">http://netkit-ng.github.io/</a>. The netkit version that is available on<br>
> that link is the one that worked with dnsmasq just fine, and that<br>
> version was 2.62 and kernel 3.2. However I've updated it and am running<br>
> 2.80 and kernel 5.6. <br>
> <br>
> Anything else I can provide you with that might help? It's a very unique<br>
> setup so I appreciate it's probably not the easiest thing to try and<br>
> debug. <br>
> <br>
<br>
First, answer a simple question the answer to which I may have missed.<br>
Is dnsmasq logging the receipt of DHCPDISCOVER messages? Can we see the<br>
whole log showing that?<br>
<br>
The next stage is to run dnsmasq under strace (check back here if you<br>
need instructions on that) and see what system calls it's making.<br>
<br>
<br>
Simon.<br>
<br>
<br>
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</blockquote></div>