Re: [Dnsmasq-discuss] Why does dnsmasq append .home to a plain hostname?
Hello, I did some more testing and confirmed that the .home was being sent to the dhcp client (my laptop) by the dhcp server on my router. The Windows OS then appended that dns suffix when doing a dns lookup on any unqualified domain names. Actually I was able to confirm Windows order of name resolution: 1. The client checks to see if the name queried is its own. 2. The client then searches a local Hosts file, a list of IP address and names stored on the local computer. 3. Domain Name System (DNS) servers are queried. 4. If the name is still not resolved, NetBIOS name resolution sequence is used as a backup. This order can be changed by configuring the NetBIOS node type of the client. I need a webpage to work from Windows and from an Android phone so my question now is to confirm what is the process of name resolution on Android OS? My dnsmasq.conf contains these two lines (as well as others!) address=/mymovies/192.168.1.124 #address=/mymovies.home/192.168.1.124 So the mymovies.home is commented out. Here is dnsmasq log file after I try to access a webpage from the Android phone with the url http://mymovies Oct 28 02:07:22 dnsmasq[16759]: query[A] mymovies.home from XX.XX.XXX.XXX Oct 28 02:07:22 dnsmasq[16759]: forwarded mymovies.home to 192.168.1.254 Oct 28 02:07:24 dnsmasq[16759]: query[A] mymovies.home from XX.XX.XXX.XXX Oct 28 02:07:24 dnsmasq[16759]: forwarded mymovies.home to 192.168.1.254 Oct 28 02:07:26 dnsmasq[16759]: reply mymovies.home is NXDOMAIN Oct 28 02:07:26 dnsmasq[16759]: reply mymovies.home is NXDOMAIN Oct 28 02:07:26 dnsmasq[16759]: query[A] mymovies from XX.XX.XXX.XXX Oct 28 02:07:26 dnsmasq[16759]: config mymovies is 192.168.1.124 Oct 28 02:10:22 dnsmasq[16759]: query[A] mymovies from XX.XX.XXX.XXX Oct 28 02:10:22 dnsmasq[16759]: config mymovies is 192.168.1.124 Oct 28 02:16:14 dnsmasq[18418]: query[A] mymovies from XX.XX.XXX.XXX Oct 28 02:16:14 dnsmasq[18418]: config mymovies is 192.168.1.124 The X's are my routers public ip address redacted. Can someone explain what is happening? It looks like dnsmasq starts by trying to resolve mymovies.home then it can't so it tries mymovies and succeeds? So does this mean that Android OS will try to do name resolution on an unqualified domain name? I know that Windows will not. The last four lines in the log output are when I just repeated the same webpage load from the Android phone two times. The first time I just reloaded the page (at 02:10:22). The second time I actually restarted dnsmasq and cleared the phones browser dns cache and recent history (at 02:16:14). However it looks like those last two name resolutions were successful from an earlier cached response? Why didn't it try mymovies.home on these last two occassions? Maybe I needed to do something like an ipconfig /flushdns on the phone.. if only it was rooted, which it isn't. Sorry but my understanding of dnsmasq is limited! Thank you, Flex ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] Why does dnsmasq append .home to a plain hostname?
On 23/10/19 8:04 am, Sean Warner wrote: Hello, Thank you for answering Uwe. Your response gave me some good pointers. I don’t think a “default domain” entry is coming from my Windows laptop. It’s Windows 7 Home Premium and that version knows nothing about domains. I googled that and also to see if Chrome maybe adds in a .home if a domain is “missing” but I don’t think it does either. What does the Windows command "ipconfig /all" say? Look for "DNS Suffix" near the top and "connection-specific DNS suffix" on your network adapter. I think you will find "home" there. Hamish ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] Why does dnsmasq append .home to a plain hostname?
On Tue, Oct 22, 2019 at 10:04:37PM +0100, Sean Warner wrote: > > I don't think a "default domain" entry is coming from my Windows laptop. > It's Windows 7 Home Premium and that version knows nothing about domains. I > googled that and also to see if Chrome maybe adds in a .home if a domain is > "missing" but I don't think it does either. Windows uses the term 'domain' to mean something more than just DNS domain. All versions of Windows are aware of DNS domains; it's the other kind they upsell. > I checked my router homepage and there is an option in there to pull up the > homepage using the url http://mymodem.home instead of the usual > http://192.168.1.254 It lets you change the "mymodem" part. So maybe the > request for http://mymovies somehow gets the .home domain added to it when > the request goes through the router and back to dnsmasq ? > > Regarding having: "domain = home" in your dnsmasq config. I don't! Also my > Windows laptop isn't configured to use dnsmasq for dhcp. My router gives out > ip addresses and the laptop has a fixed ip as does the Pi. Your router is almost certainly sending .home as the DNS domain in its DHCP response. Windows is appending it on bare-hostname lookups because it was told by its DHCP server that it is part of the .home DNS domain. khm ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] Why does dnsmasq append .home to a plain hostname?
Hello, Thank you for answering Uwe. Your response gave me some good pointers. I don't think a "default domain" entry is coming from my Windows laptop. It's Windows 7 Home Premium and that version knows nothing about domains. I googled that and also to see if Chrome maybe adds in a .home if a domain is "missing" but I don't think it does either. I checked my router homepage and there is an option in there to pull up the homepage using the url http://mymodem.home instead of the usual http://192.168.1.254 It lets you change the "mymodem" part. So maybe the request for http://mymovies somehow gets the .home domain added to it when the request goes through the router and back to dnsmasq ? Regarding having: "domain = home" in your dnsmasq config. I don't! Also my Windows laptop isn't configured to use dnsmasq for dhcp. My router gives out ip addresses and the laptop has a fixed ip as does the Pi. Thanks for your help. I'm just working through your advice to help me debug where .home is coming from. I guess I could find more useful things to spend time on but my problem is it annoys me when I don't understand things. that's how stuff stops working and you have no idea why! Flex ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] Why does dnsmasq append .home to a plain hostname?
Hi, The reason for this is a “default domain” entry in the Windows 7 laptop configuration, so it is sent by the client in the case of a missing domain. It was not added by dnsmasq, but by the Windows client. On the other hand, this still resolves, because you seem to also have a “domain = home” in your dnsmasq config, so the “mymovies” entry working also for the deafult domain on the dnsmasq side. As the windows device (using dnsmasq also for DHCP) gets the default domain by the above entry. I am not sure what your problem is, to me it looks like it’s configured correctly. If you want “.ncp” your preferred domain, set “domain = ncp” and only keep the first entry. Uwe - Uwe Schindler Achterdiek 19, D-28357 Bremen https://www.thetaphi.de eMail: u...@thetaphi.de From: Dnsmasq-discuss On Behalf Of Sean Warner Sent: Tuesday, October 22, 2019 2:25 AM To: dnsmasq-discuss@lists.thekelleys.org.uk Subject: [Dnsmasq-discuss] Why does dnsmasq append .home to a plain hostname? Hello, I have these two lines in my /etc/dnsmasq.conf address=/mymovies/192.168.1.124 address=/mymovies.ncp/192.168.1.124 Dnsmasq is running on a Pi. Also on the same LAN is my Win 7 laptop. When I make this request from Chrome on the laptop… http://mymovies this is what I get in the dnsmasq log file: Oct 21 23:38:12 dnsmasq[19823]: query[A] mymovies.home from XX.XX.XXX.XXX Oct 21 23:38:12 dnsmasq[19823]: config mymovies.home is 192.168.1.124 However when I make this request from Chrome http://mymovies.ncp this is what I get in the dnsmasq log file: Oct 21 23:41:54 dnsmasq[19823]: query[A] mymovies.ncp from XX.XX.XXX.XXX Oct 21 23:41:54 dnsmasq[19823]: config mymovies.ncp is 192.168.1.124 Apologies if this is a really basic question, I am a beginner with dnsmasq. Why is .home appended to a hostname when it is just a plain simple word without any domain or tld? Thank you, Flex ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
[Dnsmasq-discuss] Why does dnsmasq append .home to a plain hostname?
Hello, I have these two lines in my /etc/dnsmasq.conf address=/mymovies/192.168.1.124 address=/mymovies.ncp/192.168.1.124 Dnsmasq is running on a Pi. Also on the same LAN is my Win 7 laptop. When I make this request from Chrome on the laptop. http://mymovies this is what I get in the dnsmasq log file: Oct 21 23:38:12 dnsmasq[19823]: query[A] mymovies.home from XX.XX.XXX.XXX Oct 21 23:38:12 dnsmasq[19823]: config mymovies.home is 192.168.1.124 However when I make this request from Chrome http://mymovies.ncp this is what I get in the dnsmasq log file: Oct 21 23:41:54 dnsmasq[19823]: query[A] mymovies.ncp from XX.XX.XXX.XXX Oct 21 23:41:54 dnsmasq[19823]: config mymovies.ncp is 192.168.1.124 Apologies if this is a really basic question, I am a beginner with dnsmasq. Why is .home appended to a hostname when it is just a plain simple word without any domain or tld? Thank you, Flex ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
