[SR-Users] AWS binat external -> internal routing and record_route

[Joel Serrano]

I thought the same.

I tested a couple different scenarios and ways to do it, from my
perspective the simplest is:

1- Listen on 2 ports
2- Use the special attribute “socket” in dispatcher.

That way I hardly have to touch the kamailio config and I don’t have to
check stuff and select correct socket blablabla.. it’s done automagically
by dispatcher.

Cheers,
Joel.


On Thu, Jan 17, 2019 at 00:26 Dmitry Sytchev <kbdfck at gmail.com> wrote:

> I've chosen that path with second port for internal traffic.
> Not as cool as single port, but for now I found this simplifies my
> config file flow. I haven't managed this to be done with conditions,
> because it becomes harder when we decide about directions etc...
>
> I'd be glad to know if you find other ways to do this!
>
> ср, 16 янв. 2019 г. в 21:06, Joel Serrano <joel at textplus.com>:
> >
> > Hello Dmitry,
> >
> > I was wondering if you got this working? I'm facing a similar scenario
> and I don't know if it's worth going this path vs having a second port on
> internal IP without advertise just for internal traffic.... ?
> >
> > Thanks,
> > Joel.
> >
> > On Mon, Dec 17, 2018 at 3:55 AM Dmitry Sytchev <kbdfck at gmail.com> wrote:
> >>
> >> Yes, I'm handling external IP with domain module, so I'm matching it
> >> as 'myself'.
> >> I'll try to do it this way.
> >>
> >> Thank you, Daniel!
> >>
> >> пн, 17 дек. 2018 г. в 14:49, Daniel-Constantin Mierla <
> miconda at gmail.com>:
> >> >
> >> >
> >> > On 17.12.18 12:37, Daniel-Constantin Mierla wrote:
> >> > > Hello,
> >> > >
> >> > >
> >> > > On 17.12.18 11:38, Dmitry Sytchev wrote:
> >> > >> Hi all!
> >> > >> I have a question that arises in mailing list sometimes, but it is
> >> > >> still not clear for me how to work with this.
> >> > >>
> >> > >> We have AWS instance with standard Amazon bi-nat, so basically
> >> > >> communication with external hosts works with
> >> > >> listen udp:ip:port advertise ip:port
> >> > >>
> >> > >> But in case when we need to send external call to internal network
> by
> >> > >> internal ip addresses, we want to have internal host in
> record-route.
> >> > >> As far as I understand, basic recommendation is to use separate
> port
> >> > >> or internal address and select it with appropriate function.
> >> > >>
> >> > >> Maybe it is more theoretical question, but can we do something to
> >> > >> generate correct record-routes and VIA for calls coming from
> external
> >> > >> network to make their softswitches happy, and still maintain
> internal
> >> > >> address in messages going to internal hosts, using single host and
> >> > >> port on Kamailio behind nat?
> >> > > you can do also without setting advertise address for a listen
> socket.
> >> > > Just listen on local IP and then you have to use
> >> > > set_advertise_address(...) to set the IP in Via and
> >> > > record_route_preset(...) to set the Record-Route header.
> >> > >
> >> > > Only that the config becomes a bit more complex, you have to add IF
> >> > > conditions when to add private or public IP addresses there.
> >> >
> >> > One thing I forgot: the public IP has to be treated as local IP (to
> >> > match against 'myself'), so you have to do conditions on it -- either
> >> > directly in the config conditions, or adding an alias or using domain
> >> > module.
> >> >
> >> > Cheers,
> >> > Daniel
> >> >
> >> > --
> >> > Daniel-Constantin Mierla -- www.asipto.com
> >> > www.twitter.com/miconda -- www.linkedin.com/in/miconda
> >> > Kamailio World Conference - May 6-8, 2019 -- www.kamailioworld.com
> >> > Kamailio Advanced Training - Mar 4-6, 2019 -- www.asipto.com
> >> >
> >>
> >>
> >> --
> >> Best regards,
> >>
> >> Dmitry Sytchev,
> >> IT Engineer
> >>
> >> _______________________________________________
> >> Kamailio (SER) - Users Mailing List
> >> sr-users at lists.kamailio.org
> >> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>
>
>
> --
> Best regards,
>
> Dmitry Sytchev,
> IT Engineer
>
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