[Dnsmasq-discuss] Behavior change of upstream servers set via DBus

[Matus UHLAR - fantomas]

On 09.11.21 19:59, Jerry Xiao wrote:
>So how can I achieve the same behavior as "server=/#/1.1.1.1" from
>dnsmasq 2.85?

according to 2.85 docs (debian 11) the server=/#/1.1.1.1 makes no sense.

I don't have older docs around, and I haven't found that syntax in changelog
(https://thekelleys.org.uk/dnsmasq/CHANGELOG), what do you expect it to do?

you said that the upstream server is 192.168.1.1 (no matter, if set in
config file, via dbus or in resolv.conf), so all queries are forwarded to
it.

you also set:
server=/google.com/#

which means to send requests for google.com and subdomains to default server
(192.168.1.1). Just as you describe.

if you want to send all requests except of google.com to 1.1.1.1, you must:

1. set default server to 1.1.1.1

server=1.1.1.1

2. point google.com to 192.168.1.1

server=/google.com/192.168.1.1

that's it.

>On Tue, 2021-11-09 at 10:33 +0100, Matus UHLAR - fantomas via Dnsmasq-
>discuss wrote:
>> On 09.11.21 17:02, Jerry Xiao wrote:
>> > With dnsmasq 2.85 I was able to do the following:
>> > 1. set upstream servers (lets say 192.168.1.1) via dbus from the
>> > dhcp
>> > client, in my case it was networkmanager.
>> > 2. add the following config (dnsmasq 2.85):
>> > server=/google.com/#
>> > server=/#/1.1.1.1
>> >
>> > So that only google.com and its subdomains are forwarded to the
>> > upstream server (192.168.1.1) while requests for any other domains
>> > went
>> > ahead to 1.1.1.1.
>>
>> > However with the recent update of dnsmasq 2.86 I noticed that the
>> > same
>> > config above would not work. It seems that the right syntax for
>> > "server=/#/1.1.1.1" has become "server=//1.1.1.1". This isn't the
>> > biggest problem though.
>> >
>> > with this new config (dnsmasq 2.86):
>> > server=/google.com/#
>> > server=//1.1.1.1
>> >
>> > Now every single domain (including google.com) is forwarded to the
>> > upstream server (192.168.1.1) set via the dbus api instead of
>> > 1.1.1.1,
>>
>> that's because the:
>>
>> server=/google.com/#
>>
>> means to send the "google.com" requests to default upstream server:
>>
>>     The special server address '#' means, "use the standard servers",
>> so
>>     --server=/google.com/1.2.3.4 --server=/www.google.com/# will send
>>     queries for *.google.com to 1.2.3.4, except *www.google.com which
>> will
>>     be forwarded as usual.
>>
>> while the:
>>
>> server=//1.1.1.1
>>
>> means to send UNQUALIFIED hosts to 1.1.1.1
>>
>>
>> > which is an unexpected behavior change from the previous version.
>> > Setting the upstream server (192.168.1.1) with this config line
>> > "server=192.168.1.1" without dbus works, though.
>> >
>> > Is there something wrong with the new upstream server selection
>> > logic?

-- 
Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
He who laughs last thinks slowest.