Re: [Dnsmasq-discuss] Where does dnsmasq get upstream DNS servers by default?
On Mon, May 30, 2022 at 12:49:22AM +0200, Uwe Schindler via Dnsmasq-discuss wrote: > Hi Chris > > However this brings me back to where my original question came from, since > > there > > is no 'nameserver' entry pointing at localhost will dnsmasq cache? Or do I > > have > > to manually add a 'nameserver 127.0.0.1' somewhere? > > Dnsmasq will cache for requests coming from localhost (like local tools, > ssh,...) and also from other devices on your local network. Local programs > on same machine like SSH, browsers, webservers, mailservers,... work because > of your /etc/resolv.conf file: It points to dnsmasq. > > Dnsmasq caches and forwards unknown requests to the server provided by > NetworkManager (which does similar stuff like resolvconf package). Somebody > should change the /etc/default/dnsmasq comment and say "resolvconf or > NetworkManager"). > Yes, thanks, on thinking about how it's all supposed to work the above makes sense. -- Chris Green ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk https://lists.thekelleys.org.uk/cgi-bin/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] Where does dnsmasq get upstream DNS servers by default?
Hi Chris However this brings me back to where my original question came from, since there is no 'nameserver' entry pointing at localhost will dnsmasq cache? Or do I have to manually add a 'nameserver 127.0.0.1' somewhere? Dnsmasq will cache for requests coming from localhost (like local tools, ssh,...) and also from other devices on your local network. Local programs on same machine like SSH, browsers, webservers, mailservers,... work because of your /etc/resolv.conf file: It points to dnsmasq. Dnsmasq caches and forwards unknown requests to the server provided by NetworkManager (which does similar stuff like resolvconf package). Somebody should change the /etc/default/dnsmasq comment and say "resolvconf or NetworkManager"). Uwe Am 29.05.2022 um 16:18 schrieb Chris Green: With the default /etc/default/dnsmasq file on Ubuntu it says:- # If the resolvconf package is installed, dnsmasq will use its output # rather than the contents of /etc/resolv.conf to find upstream # nameservers. Uncommenting this line inhibits this behaviour. # Note that including a "resolv-file=" line in # /etc/dnsmasq.conf is not enough to override resolvconf if it is # installed: the line below must be uncommented. #IGNORE_RESOLVCONF=yes I'm pretty sure I don't have resolvconf (or openresolv) so, in this case how does dnsmasq find the upstream servers. /etc/resolv.conf is :- # Generated by resolvconf nameserver 127.0.0.1 search zbmc.eu Which is a bit odd since I don't have resolvconf. The system works OK, DNS works, but I'd like to know how. -- Uwe Schindler Achterdiek 19, D-28357 Bremen https://www.thetaphi.de eMail: u...@thetaphi.de ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk https://lists.thekelleys.org.uk/cgi-bin/mailman/listinfo/dnsmasq-discuss -- Uwe Schindler Achterdiek 19, D-28357 Bremen https://www.thetaphi.de eMail: u...@thetaphi.de ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk https://lists.thekelleys.org.uk/cgi-bin/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] Where does dnsmasq get upstream DNS servers by default?
On Sun, May 29, 2022 at 05:29:41PM +0200, Uwe Schindler via Dnsmasq-discuss wrote: [snip - useful explanation, thank you] Ah, now I see how it's working. I have a file in /etc/dnsmasq.d which contains:- resolv-file=/run/NetworkManager/no-stub-resolv.conf ... and /run/NetworkManager/no-stub-resolv.conf is:- # Generated by NetworkManager search zbmc.eu nameserver 192.168.1.2 (and I have a fully configured dnsmasq running on 192.168.1.2 with links up to upstream nameservers) However this brings me back to where my original question came from, since there is no 'nameserver' entry pointing at localhost will dnsmasq cache? Or do I have to manually add a 'nameserver 127.0.0.1' somewhere? > Uwe > > Am 29.05.2022 um 16:18 schrieb Chris Green: > > With the default /etc/default/dnsmasq file on Ubuntu it says:- > > > > # If the resolvconf package is installed, dnsmasq will use its output > > # rather than the contents of /etc/resolv.conf to find upstream > > # nameservers. Uncommenting this line inhibits this behaviour. > > # Note that including a "resolv-file=" line in > > # /etc/dnsmasq.conf is not enough to override resolvconf if it is > > # installed: the line below must be uncommented. > > #IGNORE_RESOLVCONF=yes > > > > I'm pretty sure I don't have resolvconf (or openresolv) so, in this > > case how does dnsmasq find the upstream servers. /etc/resolv.conf is :- > > > > # Generated by resolvconf > > nameserver 127.0.0.1 > > search zbmc.eu > > Which is a bit odd since I don't have resolvconf. > > > > The system works OK, DNS works, but I'd like to know how. > > > > > -- > Uwe Schindler > Achterdiek 19, D-28357 Bremen > https://www.thetaphi.de > eMail: u...@thetaphi.de > > > ___ > Dnsmasq-discuss mailing list > Dnsmasq-discuss@lists.thekelleys.org.uk > https://lists.thekelleys.org.uk/cgi-bin/mailman/listinfo/dnsmasq-discuss -- Chris Green ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk https://lists.thekelleys.org.uk/cgi-bin/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] Where does dnsmasq get upstream DNS servers by default?
Hi, /etc/resolv.conf may have this header, because at some point resolvconf was installed on your system. If resolvconf is (or was) installed, the main /etc/resolv.conf file is a symlink to some autogenerated file (/run/resolvconf/resolv.conf). This autogenerated file is created because resolvconf wants all local apps (except) dnsmasq to use dnsmasq as DNS server. It is NOT used as upstream server by dnsmasq, it is for downstream programs on local machine (like ssh, mail server,...). Plain simple? So in short, your /etc/resolv.conf is correct. If you dont have resolvconf package installed (check with 'dpkg -l | grep resolv') it is a relic, but the contents are correct. The upstream resolver used by dnsmasq is also maintained by resolvconf (if enabled) and passed via command line. It is also in the /run/resolvconf folder. If you don't have resolvconf pkg installed, you HAVE TO add your own "resolv-file=" or "server=ip" to dnsmasq config file, otherwise it won't work. There's no default on Ubuntu. Uwe Am 29.05.2022 um 16:18 schrieb Chris Green: With the default /etc/default/dnsmasq file on Ubuntu it says:- # If the resolvconf package is installed, dnsmasq will use its output # rather than the contents of /etc/resolv.conf to find upstream # nameservers. Uncommenting this line inhibits this behaviour. # Note that including a "resolv-file=" line in # /etc/dnsmasq.conf is not enough to override resolvconf if it is # installed: the line below must be uncommented. #IGNORE_RESOLVCONF=yes I'm pretty sure I don't have resolvconf (or openresolv) so, in this case how does dnsmasq find the upstream servers. /etc/resolv.conf is :- # Generated by resolvconf nameserver 127.0.0.1 search zbmc.eu Which is a bit odd since I don't have resolvconf. The system works OK, DNS works, but I'd like to know how. -- Uwe Schindler Achterdiek 19, D-28357 Bremen https://www.thetaphi.de eMail: u...@thetaphi.de ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk https://lists.thekelleys.org.uk/cgi-bin/mailman/listinfo/dnsmasq-discuss
[Dnsmasq-discuss] Where does dnsmasq get upstream DNS servers by default?
With the default /etc/default/dnsmasq file on Ubuntu it says:- # If the resolvconf package is installed, dnsmasq will use its output # rather than the contents of /etc/resolv.conf to find upstream # nameservers. Uncommenting this line inhibits this behaviour. # Note that including a "resolv-file=" line in # /etc/dnsmasq.conf is not enough to override resolvconf if it is # installed: the line below must be uncommented. #IGNORE_RESOLVCONF=yes I'm pretty sure I don't have resolvconf (or openresolv) so, in this case how does dnsmasq find the upstream servers. /etc/resolv.conf is :- # Generated by resolvconf nameserver 127.0.0.1 search zbmc.eu Which is a bit odd since I don't have resolvconf. The system works OK, DNS works, but I'd like to know how. -- Chris Green ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk https://lists.thekelleys.org.uk/cgi-bin/mailman/listinfo/dnsmasq-discuss
