Hi All, I'm running dnsmasq 2.76 on a Raspberry Pi. It's been working great for months but today I started seeing an odd behavior for a specific local device and I don't know how to troubleshoot it.
The device is a Dell Inspiron 5577 Windows 10 Home edition laptop with the latest Windows updates. It's getting an IP address of 192.168.1.115. I first noticed the problem when I tried to establish a VNC connection to it because I can't connect via its hostname, "sagan", but I can connect via its IP address. Neither the IP assignment nor the laptop's MAC address appear in dnsmasq.leases. The only reason I know it is assigned .115 is by physically going to the laptop and running the Windows 'ipconfig' program at the command prompt. I've rebooted the Raspberry Pi and the Windows 10 laptop, but it hasn't made a difference. More info below. Does anyone have any ideas? Regards, Todd 1. dnsmasq.log shows: /var/log/dnsmasq.log:Feb 15 12:38:34 dnsmasq[738]: config 192.168.1.115 is NXDOMAIN 2. I believe the following are the relevant dnsmasq config file entries. These have been working for quite some time. I'm obfuscating the full MAC address: dhcp-host=f4:8e:38:xx:xx:xx,sagan domain=si.loc local=/si.loc/ expand-hosts 3. $ dnsmasq --test dnsmasq: syntax check OK. 4. Using the program WinIPConfig2012 a.k.a. WinIPConfig 4.0 <http://www.pkostov.com/wordpress/?p=19>, I've verified that the laptop is using the Raspberry Pi as the DHCP server. There's no other DHCP server on my network that I know of. 5. On a third computer, a Macintosh, I get these results. The Raspberry Pi is at 192.168.1.40. $ ping sagan *ping: cannot resolve sagan: Unknown host* $ ping sagan.si.loc *ping: cannot resolve sagan.si.loc: Unknown host* $ dig sagan ; <<>> DiG 9.8.5-P1 <<>> sagan ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: *NOERROR*, id: 21157 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;sagan. IN A ;; Query time: 1 msec ;; SERVER: 192.168.1.40#53(192.168.1.40) ;; WHEN: Thu Feb 15 13:22:25 PST 2018 ;; MSG SIZE rcvd: 23 $ dig sagan.si.loc ; <<>> DiG 9.8.5-P1 <<>> sagan.si.loc ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: *NXDOMAIN*, id: 11132 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;sagan.si.loc. IN A ;; Query time: 1 msec ;; SERVER: 192.168.1.40#53(192.168.1.40) ;; WHEN: Thu Feb 15 13:22:26 PST 2018 ;; MSG SIZE rcvd: 30 $ nslookup sagan Server: 192.168.1.40 Address: 192.168.1.40#53 Non-authoritative answer: *** *Can't find sagan: No answer* $ nslookup sagan.si.loc Server: 192.168.1.40 Address: 192.168.1.40#53 ** *server can't find sagan.si.loc: NXDOMAIN*
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