11 May
2018
11 May
'18
5:13 p.m.
Hi,
I have updated this article with some other topics:
http://blog.csrpswitch.com/server-side-nat-traversal-with-kamailio-the-defi…
"The definitive guide" is of course an ambitious and moving target, so
there may be more evolution in the future.
-- Alex
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
12 May
12 May
9:31 a.m.
Hi,
That's greats concept in this regards.
I think it could be great to describe about SEMS (e.g B2BUA,
NAT-Traversal) and working it with Kamailio.
The SEMS has proper modules to solve NAT Traversal in Kamailio,too
If you want, I could give you it's documents.
Thanks With Regards.Mojtaba
On Fri, May 11, 2018 at 6:43 PM, Alex Balashov
<abalashov(a)evaristesys.com> wrote:
Hi,
I have updated this article with some other topics:
http://blog.csrpswitch.com/server-side-nat-traversal-with-kamailio-the-defi…
"The definitive guide" is of course an ambitious and moving target, so
there may be more evolution in the future.
-- Alex
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
--
--Mojtaba Esfandiari.S
9:33 a.m.
Thank you, but the scope is ambitious enough that I think it would make most sense to
limit it to Kamailio-native approaches only.
On May 12, 2018 8:31:58 AM GMT+02:00, Mojtaba <mespio(a)gmail.com> wrote:
Hi,
That's greats concept in this regards.
I think it could be great to describe about SEMS (e.g B2BUA,
NAT-Traversal) and working it with Kamailio.
The SEMS has proper modules to solve NAT Traversal in Kamailio,too
If you want, I could give you it's documents.
Thanks With Regards.Mojtaba
On Fri, May 11, 2018 at 6:43 PM, Alex Balashov
<abalashov(a)evaristesys.com> wrote:
-- Alex
--
Sent via mobile, please forgive typos and brevity.
Hi,
I have updated this article with some other topics:
http://blog.csrpswitch.com/server-side-nat-traversal-with-kamailio-the-defi…
"The definitive guide" is of course an ambitious and moving target,
so
there may be more evolution in the future.
-- Alex
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
--
--Mojtaba Esfandiari.S
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users 
14 May
14 May
8:27 p.m.
Hi Alex,
Glad to see the mention of SIP Outbound in your updated article. Here's
another 5+5 cents of mine that might help others in the future.
May be you faced it, may be not, but in the multi-homed scenario that you
describe in your article, there may be circumstances under which calls
towards the NAT'ed phone will fail mysteriously. Reason being Firewalls of
some ISPs or Enterprises that do packet inspection will reject such SIP
requests due to presence of private IP addresses in the VIA and
Record-Route headers (those of the SIP farm servers).
The solution to overcome this impediment was quite simple and unexpected
for me - TLS encrypt your SIP traffic, which renders firewall packet
inspection to... a black hole :)
Same technique bypasses whatever 'smart' ALG Router there might be at
client's premises.
Cheers,
--Sergiu
On Sat, May 12, 2018 at 2:33 AM, Alex Balashov <abalashov(a)evaristesys.com>
wrote:
Thank you, but the scope is ambitious enough that I
think it would make
most sense to limit it to Kamailio-native approaches only.
On May 12, 2018 8:31:58 AM GMT+02:00, Mojtaba <mespio(a)gmail.com> wrote:
-- Alex
--
Sent via mobile, please forgive typos and brevity.
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
Hi,
That's greats concept in this regards.
I think it could be great to describe about SEMS (e.g B2BUA,
NAT-Traversal) and working it with Kamailio.
The SEMS has proper modules to solve NAT Traversal in Kamailio,too
If you want, I could give you it's documents.
Thanks With Regards.Mojtaba
On Fri, May 11, 2018 at 6:43 PM, Alex Balashov
<abalashov(a)evaristesys.com> wrote:
with-kamailio-the-definitive-guide/
Hi,
I have updated this article with some other topics:
http://blog.csrpswitch.com/server-side-nat-traversal-
"The definitive guide" is of course an ambitious and moving target,
so
there may be more evolution in the future.
-- Alex
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
--
--Mojtaba Esfandiari.S
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
9:35 p.m.
Hi Sergiu,
Thanks for the suggestion! I've not encountered this on a sufficiently
widespread basis that I personally feel it merits inclusion in the
article, given its already rather broad scope. However, I will certainly
have a think on whether there it ought to be incorporated into
additional commentary of some sort on edge cases and that.
On Mon, May 14, 2018 at 01:27:23PM -0400, Sergiu Pojoga wrote:
Hi Alex,
Glad to see the mention of SIP Outbound in your updated article. Here's
another 5+5 cents of mine that might help others in the future.
May be you faced it, may be not, but in the multi-homed scenario that you
describe in your article, there may be circumstances under which calls
towards the NAT'ed phone will fail mysteriously. Reason being Firewalls of
some ISPs or Enterprises that do packet inspection will reject such SIP
requests due to presence of private IP addresses in the VIA and
Record-Route headers (those of the SIP farm servers).
The solution to overcome this impediment was quite simple and unexpected
for me - TLS encrypt your SIP traffic, which renders firewall packet
inspection to... a black hole :)
Same technique bypasses whatever 'smart' ALG Router there might be at
client's premises.
Cheers,
--Sergiu
On Sat, May 12, 2018 at 2:33 AM, Alex Balashov <abalashov(a)evaristesys.com>
wrote:
> Thank you, but the scope is ambitious enough that I think it would make
> most sense to limit it to Kamailio-native approaches only.
>
> On May 12, 2018 8:31:58 AM GMT+02:00, Mojtaba <mespio(a)gmail.com> wrote:
> >Hi,
> >That's greats concept in this regards.
> >I think it could be great to describe about SEMS (e.g B2BUA,
> >NAT-Traversal) and working it with Kamailio.
> >The SEMS has proper modules to solve NAT Traversal in Kamailio,too
> >If you want, I could give you it's documents.
> >Thanks With Regards.Mojtaba
> >
> >On Fri, May 11, 2018 at 6:43 PM, Alex Balashov
> ><abalashov(a)evaristesys.com> wrote:
> >> Hi,
> >>
> >> I have updated this article with some other topics:
> >>
> >>
> >http://blog.csrpswitch.com/server-side-nat-traversal-
> with-kamailio-the-definitive-guide/
> >>
> >> "The definitive guide" is of course an ambitious and moving
target,
> >so
> >> there may be more evolution in the future.
> >>
> >> -- Alex
> >>
> >> --
> >> Alex Balashov | Principal | Evariste Systems LLC
> >>
> >> Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
> >> Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
> >>
> >> _______________________________________________
> >> Kamailio (SER) - Users Mailing List
> >> sr-users(a)lists.kamailio.org
> >> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
> >
> >
> >
> >--
> >--Mojtaba Esfandiari.S
> >
> >_______________________________________________
> >Kamailio (SER) - Users Mailing List
> >sr-users(a)lists.kamailio.org
> >https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>
>
> -- Alex
>
> --
> Sent via mobile, please forgive typos and brevity.
>
> _______________________________________________
> Kamailio (SER) - Users Mailing List
> sr-users(a)lists.kamailio.org
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
11:15 p.m.
Why not topology hiding, in such cases? Not always clients support TLS...
On Mon, May 14, 2018, 20:38 Alex Balashov <abalashov(a)evaristesys.com> wrote:
Hi Sergiu,
Thanks for the suggestion! I've not encountered this on a sufficiently
widespread basis that I personally feel it merits inclusion in the
article, given its already rather broad scope. However, I will certainly
have a think on whether there it ought to be incorporated into
additional commentary of some sort on edge cases and that.
On Mon, May 14, 2018 at 01:27:23PM -0400, Sergiu Pojoga wrote:
Hi Alex,
Glad to see the mention of SIP Outbound in your updated article. Here's
another 5+5 cents of mine that might help others in the future.
May be you faced it, may be not, but in the multi-homed scenario that you
describe in your article, there may be circumstances under which calls
towards the NAT'ed phone will fail mysteriously. Reason being Firewalls
of
some ISPs or Enterprises that do packet
inspection will reject such SIP
requests due to presence of private IP addresses in the VIA and
Record-Route headers (those of the SIP farm servers).
The solution to overcome this impediment was quite simple and unexpected
for me - TLS encrypt your SIP traffic, which renders firewall packet
inspection to... a black hole :)
Same technique bypasses whatever 'smart' ALG Router there might be at
client's premises.
Cheers,
--Sergiu
On Sat, May 12, 2018 at 2:33 AM, Alex Balashov <
abalashov(a)evaristesys.com>
wrote:
> Thank you, but the scope is ambitious enough that I think it would make
> most sense to limit it to Kamailio-native approaches only.
>
> On May 12, 2018 8:31:58 AM GMT+02:00, Mojtaba <mespio(a)gmail.com>
wrote:
> >Hi,
> >That's greats concept in this regards.
> >I think it could be great to describe about SEMS (e.g B2BUA,
> >NAT-Traversal) and working it with Kamailio.
> >The SEMS has proper modules to solve NAT Traversal in Kamailio,too
> >If you want, I could give you it's documents.
> >Thanks With Regards.Mojtaba
> >
> >On Fri, May 11, 2018 at 6:43 PM, Alex Balashov
> ><abalashov(a)evaristesys.com> wrote:
> >> Hi,
> >>
> >> I have updated this article with some other topics:
> >>
> >>
> >http://blog.csrpswitch.com/server-side-nat-traversal-
> with-kamailio-the-definitive-guide/
> >>
> >> "The definitive guide" is of course an ambitious and moving
target,
> >so
> >> there may be more evolution in the future.
> >>
> >> -- Alex
> >>
> >> --
> >> Alex Balashov | Principal | Evariste Systems LLC
> >>
> >> Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
> >> Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
> >>
> >> _______________________________________________
> >> Kamailio (SER) - Users Mailing List
> >> sr-users(a)lists.kamailio.org
> >> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
> >
> >
> >
> >--
> >--Mojtaba Esfandiari.S
> >
> >_______________________________________________
> >Kamailio (SER) - Users Mailing List
> >sr-users(a)lists.kamailio.org
> >https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>
>
> -- Alex
>
> --
> Sent via mobile, please forgive typos and brevity.
>
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
> _______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
17 May
17 May
1:52 p.m.
Alex,
Thank you for this blog post, great work, very helpfull information!
Much appreciated.
On 11/05/18 15:13, Alex Balashov wrote:
Hi,
I have updated this article with some other topics:
http://blog.csrpswitch.com/server-side-nat-traversal-with-kamailio-the-defi…
"The definitive guide" is of course an ambitious and moving target, so
there may be more evolution in the future.
-- Alex
2:14 p.m.
You are very welcome. Please let me know if you have any ideas on how it
might be usefully expanded. Some others have made good suggestions, but
unfortunately they present scope challenges because they lie outside the
sphere of server-side NAT traversal as such.
On Thu, May 17, 2018 at 11:52:08AM +0100, Asgaroth wrote:
Alex,
Thank you for this blog post, great work, very helpfull information!
Much appreciated.
On 11/05/18 15:13, Alex Balashov wrote:
--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
Hi,
I have updated this article with some other topics:
http://blog.csrpswitch.com/server-side-nat-traversal-with-kamailio-the-defi…
"The definitive guide" is of course an ambitious and moving target, so
there may be more evolution in the future.
-- Alex
_______________________________________________
Kamailio (SER) - Users Mailing List
sr-users(a)lists.kamailio.org
https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
2381
days inactive
2387
days old
7 comments
5 participants
participants (5)
-
Alex Balashov -
Asgaroth -
Giovanni Maruzzelli -
Mojtaba -
Sergiu Pojoga