Arnoud Otten([email protected]) on 2021.10.30 22:18:09 +0200: > Hi, > > Maybe i am wrong and do not understand this right, but wat should the > ???ignore dns??? option do when used in the dhcpleased .conf config file? > Here @xs4all our IPTV network on a separate vlan also gets an ip address and > the dhcp offer also sends a dns server which should be ignored. > I also thought that with the ???ignore dns??? option, this dns server was > blocked, but that is not what the option does? > > Regards, > > Arnoud
The "ignore dns" config option causes dhcpleased to send a RTM_PROPOSAL message to resolvd with an empty DNS proposal for that interface. This causes resolvd to remove any nameserver entry for that interface from /etc/resolv.conf. Note that resolvd adds comments to the lines it touches in resolv.conf, for example: nameserver 192.168.1.1 # resolvd: iwm0 Anyone who thinks the "ignore dns" option does not work could help to debug this with the following: * run "route -n monitor" * empty the dhcpleased.conf: mv /etc/dhcpleased.conf /etc/X.dhcpleased.conf * cat /etc/resolv.conf, copy the output into an email. * restart dhcpleased: doas /etc/rc.d/dhcpleased restart * copy the output of "route -n monitor" into the email * cat /etc/resolv.conf, copy the output into the email. then run dhcpleased with the configuration file: * run "route -n monitor" * mv /etc/X.dhcpleased.conf /etc/dhcpleased.conf * cat /etc/dhcpleased.conf and copy the output into the email * cat /etc/resolv.conf, copy the output into the email. * restart dhcpleased: doas /etc/rc.d/dhcpleased restart * copy the output of "route -n monitor" into the email * cat /etc/resolv.conf, copy the output into the email. send that email as a reply to this thread. Thanks, Benno > > On 30 Oct 2021, at 21:00, Sebastian Benoit <[email protected]> wrote: > > > > ???Z?? Loff([email protected]) on 2021.10.29 18:30:29 +0100: > >>> On Fri, Oct 29, 2021 at 03:37:56PM +0300, Samarul Meu wrote: > >>> Hello to you all! > >>> > >>> Prior to 7.0 I was using this line in /etc/dhclient.conf > >>> supersede domain-name-servers 127.0.0.1; > >>> so that I do not get the DNS from the ISP provider. > >>> > >>> I am using unbound to resolve my queries. With the new changes I can not > >>> get the same functionality. > >>> > >>> I tried to add this in /etc/dhcpleased.conf > >>> interface urtwn0 ignore dns > >>> where urtwn0 is my interface or disable resolvd. > >>> > >>> If resolvd is on I get my ISP DNS server, if not when unbound starts > >>> resolvd adds the ISP DNS server to resolv.conf. > >>> > >>> Can you please tell me what am I doing wrong and how can I have only > >>> 127.0.0.1 on the resolv.conf file? > >>> > >>> Thank you! > >> > >> This works for me: > >> > >> > >> /etc/hostname.em0: > >> > >> inet autoconf > >> > >> > >> /etc/resolv.conf: > >> > >> nameserver 127.0.0.1 > >> > >> > >> /etc/dhcpleased.conf: > >> > >> interface em0 { > >> ignore dns > >> } > > > > > > If you never intend to use other nameservers on this system, you can also > > deactivate resolvd: > > > > rcctl stop resolvd > > rcctl disable resolvd > > > > and remove dhcpleased.conf again. > > > > > --
