11 Jan
2024
11 Jan
'24
9:07 p.m.
Hello!
I have a quick question about the internal DNS resolver and cache embedded
in Kamailio.
Is the ability to add an entry with dns.add_a bypass the "real" DNS lookup?
So, let's say that sip.example.com is publicly resolve alternatively with
1.2.3.4 & 5.6.7.8.9, if I do a dns.add_a to add my own sip.example.com with,
alternatively, 127.0.0.1 and 127.0.0.2, will it work?
Thanks for your highlight!
Regards,
Igor.
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11 Jan
11 Jan
9:35 p.m.
Hello,
On 11.01.24 19:07, Igor Potjevlesch via sr-users wrote:
Hello!
I have a quick question about the internal DNS resolver and cache
embedded in Kamailio.
Is the ability to add an entry with dns.add_a bypass the "real" DNS
lookup? So, let's say that sip.example.com is publicly resolve
alternatively with 1.2.3.4 & 5.6.7.8.9, if I do a dns.add_a to add my
own sip.example.com with, alternatively, 127.0.0.1 and 127.0.0.2, will
it work?
yes, it should work, the internal cache is checked first and if entry
found, then it is used.
You can also add entries in the dns cache at startup via dns_cache
modparam from corex.
Cheers,
Daniel
--
Daniel-Constantin Mierla (@ asipto.com)
twitter.com/miconda -- linkedin.com/in/miconda
Kamailio Consultancy, Training and Development Services -- asipto.com
Kamailio Advanced Training, February 20-22, 2024 -- asipto.com
Kamailio World Conference, April 18-19, 2024, Berlin -- kamailioworld.com
12 Jan
12 Jan
1:05 p.m.
Hello Daniel,
Thanks! I wll try. I didn't find out how to use dns.add_a. Is someone has the exact
params lists? Thank you.
Regards,
Igor.
De : Daniel-Constantin Mierla <miconda(a)gmail.com>
Envoyé : jeudi 11 janvier 2024 19:36
À : Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
Cc : Igor Potjevlesch <igor.potjevlesch(a)gmail.com>
Objet : Re: [SR-Users] Internal DNS resolver
Hello,
On 11.01.24 19:07, Igor Potjevlesch via sr-users wrote:
Hello!
I have a quick question about the internal DNS resolver and cache embedded in Kamailio.
Is the ability to add an entry with dns.add_a bypass the "real" DNS lookup? So,
let's say that sip.example.com is publicly resolve alternatively with 1.2.3.4 &
5.6.7.8.9, if I do a dns.add_a to add my own sip.example.com with, alternatively,
127.0.0.1 and 127.0.0.2, will it work?
yes, it should work, the internal cache is checked first and if entry found, then it is
used.
You can also add entries in the dns cache at startup via dns_cache modparam from corex.
Cheers,
Daniel
--
Daniel-Constantin Mierla (@ asipto.com)
twitter.com/miconda -- linkedin.com/in/miconda
Kamailio Consultancy, Training and Development Services -- asipto.com
Kamailio Advanced Training, February 20-22, 2024 -- asipto.com
Kamailio World Conference, April 18-19, 2024, Berlin -- kamailioworld.com
--
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1:16 p.m.
Hello,
the core rpc lack proper documentation, not like the case of modules. In
this case, the code should be suggestive of what parameters have to be
provided:
-
https://github.com/kamailio/kamailio/blob/master/src/core/dns_cache.c#L4744
For each of those values, the corex docs for dns_cache parameter should
give details.
Cheers,
Daniel
On 12.01.24 11:05, Igor Potjevlesch wrote:
Hello Daniel,
Thanks! I wll try. I didn't find out how to use dns.add_a. Is someone
has the exact params lists? Thank you.
Regards,
Igor.
*De :*Daniel-Constantin Mierla <miconda(a)gmail.com>
*Envoyé :* jeudi 11 janvier 2024 19:36
*À :* Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
*Cc :* Igor Potjevlesch <igor.potjevlesch(a)gmail.com>
*Objet :* Re: [SR-Users] Internal DNS resolver
Hello,
On 11.01.24 19:07, Igor Potjevlesch via sr-users wrote:
Hello!
I have a quick question about the internal DNS resolver and cache
embedded in Kamailio.
Is the ability to add an entry with dns.add_a bypass the "real"
DNS lookup? So, let's say that sip.example.com is publicly resolve
alternatively with 1.2.3.4 & 5.6.7.8.9, if I do a dns.add_a to add
my own sip.example.com with, alternatively, 127.0.0.1 and
127.0.0.2, will it work?
yes, it should work, the internal cache is checked first and if entry
found, then it is used.
You can also add entries in the dns cache at startup via dns_cache
modparam from corex.
Cheers,
Daniel
--
Daniel-Constantin Mierla (@ asipto.com)
twitter.com/miconda -- linkedin.com/in/miconda
Kamailio Consultancy, Training and Development Services -- asipto.com
Kamailio Advanced Training, February 20-22, 2024 -- asipto.com
Kamailio World Conference, April 18-19, 2024, Berlin -- kamailioworld.com
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--
Daniel-Constantin Mierla (@ asipto.com)
twitter.com/miconda -- linkedin.com/in/miconda
Kamailio Consultancy, Training and Development Services -- asipto.com
Kamailio Advanced Training, February 20-22, 2024 -- asipto.com
Kamailio World Conference, April 18-19, 2024, Berlin -- kamailioworld.com
1:23 p.m.
Hello,
Wonderful! Thank you Daniel.
Regards,
Igor.
De : Daniel-Constantin Mierla <miconda(a)gmail.com>
Envoyé : vendredi 12 janvier 2024 11:17
À : Igor Potjevlesch <igor.potjevlesch(a)gmail.com>om>; 'Kamailio (SER) - Users
Mailing List' <sr-users(a)lists.kamailio.org>
Objet : Re: [SR-Users] Internal DNS resolver
Hello,
the core rpc lack proper documentation, not like the case of modules. In this case, the
code should be suggestive of what parameters have to be provided:
- https://github.com/kamailio/kamailio/blob/master/src/core/dns_cache.c#L4744
For each of those values, the corex docs for dns_cache parameter should give details.
Cheers,
Daniel
On 12.01.24 11:05, Igor Potjevlesch wrote:
Hello Daniel,
Thanks! I wll try. I didn't find out how to use dns.add_a. Is someone has the exact
params lists? Thank you.
Regards,
Igor.
De : Daniel-Constantin Mierla <mailto:miconda@gmail.com> <miconda(a)gmail.com>
Envoyé : jeudi 11 janvier 2024 19:36
À : Kamailio (SER) - Users Mailing List <mailto:sr-users@lists.kamailio.org>
<sr-users(a)lists.kamailio.org>
Cc : Igor Potjevlesch <mailto:igor.potjevlesch@gmail.com>
<igor.potjevlesch(a)gmail.com>
Objet : Re: [SR-Users] Internal DNS resolver
Hello,
On 11.01.24 19:07, Igor Potjevlesch via sr-users wrote:
Hello!
I have a quick question about the internal DNS resolver and cache embedded in Kamailio.
Is the ability to add an entry with dns.add_a bypass the "real" DNS lookup? So,
let's say that sip.example.com is publicly resolve alternatively with 1.2.3.4 &
5.6.7.8.9, if I do a dns.add_a to add my own sip.example.com with, alternatively,
127.0.0.1 and 127.0.0.2, will it work?
yes, it should work, the internal cache is checked first and if entry found, then it is
used.
You can also add entries in the dns cache at startup via dns_cache modparam from corex.
Cheers,
Daniel
--
Daniel-Constantin Mierla (@ asipto.com)
twitter.com/miconda -- linkedin.com/in/miconda
Kamailio Consultancy, Training and Development Services -- asipto.com
Kamailio Advanced Training, February 20-22, 2024 -- asipto.com
Kamailio World Conference, April 18-19, 2024, Berlin -- kamailioworld.com
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--
Daniel-Constantin Mierla (@ asipto.com)
twitter.com/miconda -- linkedin.com/in/miconda
Kamailio Consultancy, Training and Development Services -- asipto.com
Kamailio Advanced Training, February 20-22, 2024 -- asipto.com
Kamailio World Conference, April 18-19, 2024, Berlin -- kamailioworld.com
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4:17 p.m.
Hello,
Just to be sure that I'm not losing my time: is there any chance to do a
load-balancing using add_srv? I just tried with two equal entries but it's always the
same which is returned.
Regards,
Igor.
De : Daniel-Constantin Mierla <miconda(a)gmail.com>
Envoyé : vendredi 12 janvier 2024 11:17
À : Igor Potjevlesch <igor.potjevlesch(a)gmail.com>om>; 'Kamailio (SER) - Users
Mailing List' <sr-users(a)lists.kamailio.org>
Objet : Re: [SR-Users] Internal DNS resolver
Hello,
the core rpc lack proper documentation, not like the case of modules. In this case, the
code should be suggestive of what parameters have to be provided:
- https://github.com/kamailio/kamailio/blob/master/src/core/dns_cache.c#L4744
For each of those values, the corex docs for dns_cache parameter should give details.
Cheers,
Daniel
On 12.01.24 11:05, Igor Potjevlesch wrote:
Hello Daniel,
Thanks! I wll try. I didn't find out how to use dns.add_a. Is someone has the exact
params lists? Thank you.
Regards,
Igor.
De : Daniel-Constantin Mierla <mailto:miconda@gmail.com> <miconda(a)gmail.com>
Envoyé : jeudi 11 janvier 2024 19:36
À : Kamailio (SER) - Users Mailing List <mailto:sr-users@lists.kamailio.org>
<sr-users(a)lists.kamailio.org>
Cc : Igor Potjevlesch <mailto:igor.potjevlesch@gmail.com>
<igor.potjevlesch(a)gmail.com>
Objet : Re: [SR-Users] Internal DNS resolver
Hello,
On 11.01.24 19:07, Igor Potjevlesch via sr-users wrote:
Hello!
I have a quick question about the internal DNS resolver and cache embedded in Kamailio.
Is the ability to add an entry with dns.add_a bypass the "real" DNS lookup? So,
let's say that sip.example.com is publicly resolve alternatively with 1.2.3.4 &
5.6.7.8.9, if I do a dns.add_a to add my own sip.example.com with, alternatively,
127.0.0.1 and 127.0.0.2, will it work?
yes, it should work, the internal cache is checked first and if entry found, then it is
used.
You can also add entries in the dns cache at startup via dns_cache modparam from corex.
Cheers,
Daniel
--
Daniel-Constantin Mierla (@ asipto.com)
twitter.com/miconda -- linkedin.com/in/miconda
Kamailio Consultancy, Training and Development Services -- asipto.com
Kamailio Advanced Training, February 20-22, 2024 -- asipto.com
Kamailio World Conference, April 18-19, 2024, Berlin -- kamailioworld.com
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>
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www.avast.com
--
Daniel-Constantin Mierla (@ asipto.com)
twitter.com/miconda -- linkedin.com/in/miconda
Kamailio Consultancy, Training and Development Services -- asipto.com
Kamailio Advanced Training, February 20-22, 2024 -- asipto.com
Kamailio World Conference, April 18-19, 2024, Berlin -- kamailioworld.com
--
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4:50 p.m.
Just so ppl you're asking don't lose their minds either trying to be
clairvoyants of your particular setup, can you post what records exactly
were added and what makes you think they are not followed by Kam when
selecting a destination?
So you add records with *dns.add* and then lookup them up with *dns.lookup*
Cheers,
On Fri, Jan 12, 2024 at 8:42 AM Igor Potjevlesch via sr-users <
sr-users(a)lists.kamailio.org> wrote:
Hello,
Just to be sure that I'm not losing my time: is there any chance to do a
load-balancing using add_srv? I just tried with two equal entries but it's
always the same which is returned.
Regards,
Igor.
*De :* Daniel-Constantin Mierla <miconda(a)gmail.com>
*Envoyé :* vendredi 12 janvier 2024 11:17
*À :* Igor Potjevlesch <igor.potjevlesch(a)gmail.com>om>; 'Kamailio (SER) -
Users Mailing List' <sr-users(a)lists.kamailio.org>
*Objet :* Re: [SR-Users] Internal DNS resolver
Hello,
the core rpc lack proper documentation, not like the case of modules. In
this case, the code should be suggestive of what parameters have to be
provided:
-
https://github.com/kamailio/kamailio/blob/master/src/core/dns_cache.c#L4744
For each of those values, the corex docs for dns_cache parameter should
give details.
Cheers,
Daniel
On 12.01.24 11:05, Igor Potjevlesch wrote:
Hello Daniel,
Thanks! I wll try. I didn't find out how to use dns.add_a. Is someone has
the exact params lists? Thank you.
Regards,
Igor.
*De :* Daniel-Constantin Mierla <miconda(a)gmail.com> <miconda(a)gmail.com>
*Envoyé :* jeudi 11 janvier 2024 19:36
*À :* Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
<sr-users(a)lists.kamailio.org>
*Cc :* Igor Potjevlesch <igor.potjevlesch(a)gmail.com>
<igor.potjevlesch(a)gmail.com>
*Objet :* Re: [SR-Users] Internal DNS resolver
Hello,
On 11.01.24 19:07, Igor Potjevlesch via sr-users wrote:
Hello!
I have a quick question about the internal DNS resolver and cache embedded
in Kamailio.
Is the ability to add an entry with dns.add_a bypass the "real" DNS
lookup? So, let's say that sip.example.com is publicly resolve
alternatively with 1.2.3.4 & 5.6.7.8.9, if I do a dns.add_a to add my own
sip.example.com with, alternatively, 127.0.0.1 and 127.0.0.2, will it
work?
yes, it should work, the internal cache is checked first and if entry
found, then it is used.
You can also add entries in the dns cache at startup via dns_cache
modparam from corex.
Cheers,
Daniel
--
Daniel-Constantin Mierla (@ asipto.com)
twitter.com/miconda -- linkedin.com/in/miconda
Kamailio Consultancy, Training and Development Services -- asipto.com
Kamailio Advanced Training, February 20-22, 2024 -- asipto.com
Kamailio World Conference, April 18-19, 2024, Berlin -- kamailioworld.com
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>
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<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>
--
Daniel-Constantin Mierla (@ asipto.com)
twitter.com/miconda -- linkedin.com/in/miconda
Kamailio Consultancy, Training and Development Services -- asipto.com
Kamailio Advanced Training, February 20-22, 2024 -- asipto.com
Kamailio World Conference, April 18-19, 2024, Berlin -- kamailioworld.com
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4:55 p.m.
You're right, sorry:
kamcmd dns.add_srv _sip._udp.example.com 3600 0 50 5060 srv1.com 2
kamcmd dns.add_srv _sip._udp.example.com 3600 0 50 5060 srv2.com 2
kamcmd dns.add_a srv1.com 3600 192.168.1.1 2
kamcmd dns.add_a srv2.com 3600 192.168.1.2 2
Finally, it looks to work fine by adding:
dns_srv_lb=yes
use_dns_failover=yes
De : Sergiu Pojoga <pojogas(a)gmail.com>
Envoyé : vendredi 12 janvier 2024 14:50
À : Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
Cc : miconda(a)gmail.com; Igor Potjevlesch <igor.potjevlesch(a)gmail.com>
Objet : Re: [SR-Users] Re: Internal DNS resolver
Just so ppl you're asking don't lose their minds either trying to be clairvoyants
of your particular setup, can you post what records exactly were added and what makes you
think they are not followed by Kam when selecting a destination?
So you add records with dns.add and then lookup them up with dns.lookup
Cheers,
On Fri, Jan 12, 2024 at 8:42 AM Igor Potjevlesch via sr-users
<sr-users(a)lists.kamailio.org <mailto:sr-users@lists.kamailio.org> > wrote:
Hello,
Just to be sure that I'm not losing my time: is there any chance to do a
load-balancing using add_srv? I just tried with two equal entries but it's always the
same which is returned.
Regards,
Igor.
De : Daniel-Constantin Mierla <miconda(a)gmail.com <mailto:miconda@gmail.com> >
Envoyé : vendredi 12 janvier 2024 11:17
À : Igor Potjevlesch <igor.potjevlesch(a)gmail.com
<mailto:igor.potjevlesch@gmail.com> >; 'Kamailio (SER) - Users Mailing
List' <sr-users(a)lists.kamailio.org <mailto:sr-users@lists.kamailio.org> >
Objet : Re: [SR-Users] Internal DNS resolver
Hello,
the core rpc lack proper documentation, not like the case of modules. In this case, the
code should be suggestive of what parameters have to be provided:
- https://github.com/kamailio/kamailio/blob/master/src/core/dns_cache.c#L4744
For each of those values, the corex docs for dns_cache parameter should give details.
Cheers,
Daniel
On 12.01.24 11:05, Igor Potjevlesch wrote:
Hello Daniel,
Thanks! I wll try. I didn't find out how to use dns.add_a. Is someone has the exact
params lists? Thank you.
Regards,
Igor.
De : Daniel-Constantin Mierla <mailto:miconda@gmail.com> <miconda(a)gmail.com>
Envoyé : jeudi 11 janvier 2024 19:36
À : Kamailio (SER) - Users Mailing List <mailto:sr-users@lists.kamailio.org>
<sr-users(a)lists.kamailio.org>
Cc : Igor Potjevlesch <mailto:igor.potjevlesch@gmail.com>
<igor.potjevlesch(a)gmail.com>
Objet : Re: [SR-Users] Internal DNS resolver
Hello,
On 11.01.24 19:07, Igor Potjevlesch via sr-users wrote:
Hello!
I have a quick question about the internal DNS resolver and cache embedded in Kamailio.
Is the ability to add an entry with dns.add_a bypass the "real" DNS lookup? So,
let's say that sip.example.com <http://sip.example.com> is publicly resolve
alternatively with 1.2.3.4 & 5.6.7.8.9, if I do a dns.add_a to add my own
sip.example.com <http://sip.example.com> with, alternatively, 127.0.0.1 and
127.0.0.2, will it work?
yes, it should work, the internal cache is checked first and if entry found, then it is
used.
You can also add entries in the dns cache at startup via dns_cache modparam from corex.
Cheers,
Daniel
--
Daniel-Constantin Mierla (@ asipto.com <http://asipto.com> )
twitter.com/miconda <http://twitter.com/miconda> -- linkedin.com/in/miconda
<http://linkedin.com/in/miconda>
Kamailio Consultancy, Training and Development Services -- asipto.com
<http://asipto.com>
Kamailio Advanced Training, February 20-22, 2024 -- asipto.com <http://asipto.com>
Kamailio World Conference, April 18-19, 2024, Berlin -- kamailioworld.com
<http://kamailioworld.com>
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>
Sans virus.
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>
www.avast.com
--
Daniel-Constantin Mierla (@ asipto.com <http://asipto.com> )
twitter.com/miconda <http://twitter.com/miconda> -- linkedin.com/in/miconda
<http://linkedin.com/in/miconda>
Kamailio Consultancy, Training and Development Services -- asipto.com
<http://asipto.com>
Kamailio Advanced Training, February 20-22, 2024 -- asipto.com <http://asipto.com>
Kamailio World Conference, April 18-19, 2024, Berlin -- kamailioworld.com
<http://kamailioworld.com>
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321
days inactive
322
days old
7 comments
3 participants
participants (3)
-
Daniel-Constantin Mierla -
Igor Potjevlesch -
Sergiu Pojoga