[Dnsmasq-discuss] Rewrite TTL on MX RR

Simon Kelley simon at thekelleys.org.uk
Wed Jan 6 18:30:29 GMT 2016


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It's expected, in the sense that it's coded that way: dnsmasq doesn't
do anything with with replies to queries for anything other then A
(IPv4 address) and AAAA (ipv6 address) queries.

Now I think about it, I rather class this as a bug, and would like to
change the behaviour.

Thoughts, list?


Cheers,

Simon.


On 05/01/16 11:06, Anthony Brodard wrote:
> Hi list !
> 
> I don't know if it's expected or if it's a bug, but I have a
> strange behavior when I rewrite TTL values : some RR type keep
> upstream SSL (at least mx, txt and soa).
> 
> For example :
> 
> $ dig mx gmail.com
> 
> ;; ANSWER SECTION: gmail.com. 1689 IN MX 10
> alt1.gmail-smtp-in.l.google.com. gmail.com. 1689 IN MX 30
> alt3.gmail-smtp-in.l.google.com. gmail.com. 1689 IN MX 20
> alt2.gmail-smtp-in.l.google.com. gmail.com. 1689 IN MX 40
> alt4.gmail-smtp-in.l.google.com. gmail.com. 1689 IN MX 5
> gmail-smtp-in.l.google.com.
> 
> ;; Query time: 1 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN:
> Tue Jan 05 10:51:29 CET 2016 ;; MSG SIZE  rcvd: 716
> 
> 
> $ dig gmail-smtp-in.l.google.com.
> 
> ;; ANSWER SECTION: gmail-smtp-in.L.GOOGLE.com. 60 IN A
> 74.125.195.27
> 
> ;; Query time: 0 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN:
> Tue Jan 05 10:52:23 CET 2016 ;; MSG SIZE  rcvd: 246
> 
> I'm running on an old version provided on ubuntu LTS :
> 2.68-1ubuntu0.1, but I don't notice anything in the changelog.
> 
> My conf :
> 
> $ cat /etc/dnsmasq.conf
> 
> resolv-file=/etc/resolv.dnsmasq.conf listen-address=127.0.0.1 
> bind-interfaces cache-size=1024 neg-ttl=20 max-ttl=60 
> max-cache-ttl=60 strict-order
> 
> Do you already see this behavior ? Is it normal/expected ?
> 
> Thank you ! Anthony Brodard
> 
> 
> 
> _______________________________________________ Dnsmasq-discuss
> mailing list Dnsmasq-discuss at lists.thekelleys.org.uk 
> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
> 
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