2 Apr
2020
2 Apr
'20
8:14 p.m.
I *shouldn’t need this if the pbx was saving received
and rport params
as a result of add_path_received().
You don't need to alias the Contact (for registration) in the intermediary
proxy on the way to the non-colocated Registrar. Adding path should suffice.
Can anyone explain why these two functions conflict?
I don't know, may be devs can tell. Personally, I prefer leaving the
keepalive mechanism altogether to the Registrar for better control and
granularity.
Regards,
--Sergiu
On Thu, Apr 2, 2020 at 12:48 PM Daniel W. Graham <dan(a)cmsinter.net> wrote:
> I was able to fix all issues, but have one partially lingering.
>
>
>
> For register only, if I apply: set_contact_alias() with nat_keepalive(),
> keepalives are not sent. Removing set_contact_alias() fixes this.
>
>
>
> I *shouldn’t need this if the pbx was saving received and rport params as
> a result of add_path_received().
>
>
>
Can anyone explain why these two functions conflict?
>
>
>
> Test scenario -
>
> # Doesn’t result in register keepalive –
>
>
>
> route[NATDETECT] {
>
> force_rport();
> set_contact_alias(); # removal of this enables keepalive
> nat_keepalive();
> return;
> }
>
>
>
> I’ve tested this with and without calls to handle_ruri_alias() elsewhere
> in cfg script with same result.
>
>
>
> -dan
>
>
>
> *From: *sr-users <sr-users-bounces(a)lists.kamailio.org> on behalf of
> Sergiu Pojoga <pojogas(a)gmail.com>
> *Reply-To: *"Kamailio (SER) - Users Mailing List" <
> sr-users(a)lists.kamailio.org>
> *Date: *Wednesday, April 1, 2020 at 8:58 AM
> *To: *"Kamailio (SER) - Users Mailing List"
<sr-users(a)lists.kamailio.org>
> *Subject: *Re: [SR-Users] nathelper without usrloc
>
>
>
> Nothing else comes to mind based on info provided. May be you can send
> some sip traffic captures and elaborate?
>
>
>
> Regards,
>
> --Sergiu
>
>
>
> On Tue, Mar 31, 2020 at 10:29 PM Daniel W. Graham <dan(a)cmsinter.net>
> wrote:
>
> Thanks, yeah I had already changed that, but registration works with
> either. I’m not asking for a solution, just looking for suggestions on
> anything that needs attention, so I appreciate your pointers.
>
>
>
> -dan
>
> On Mar 31, 2020, at 8:55 PM, Sergiu Pojoga <pojogas(a)gmail.com> wrote:
>
>
>
> Oh and almost forgot - try *add_path_received()* instead of add_path()
>
>
>
> Good luck!
>
>
>
> On Tue, Mar 31, 2020 at 8:48 PM Sergiu Pojoga <pojogas(a)gmail.com> wrote:
>
> A lot of things may not be 'right' here, unfortunately your question is
> too broad to answer and too little info, the topology is indeed non-default
> and I doubt someone will present you with a final solution (there's
> business support, if you're looking for that).
>
>
>
> Otherwise, if I were to just throw a guess:
>
> - try fix_nated_register() (instead of set_contact_alias) just for
> Register method on the way to the registrar
>
> - in the Registrar, make sure the Contact's Path address is correct
>
>
>
> Cheers,
>
> --Sergiu
>
>
>
> On Tue, Mar 31, 2020 at 7:34 PM Daniel W. Graham <dan(a)cmsinter.net> wrote:
>
> It did help, I read that a couple times already but something is still not
> right, and its only because of the decoupling of the registrar. I need to
> do more debugging and see if Im loosing the flag value. Hoping something
> sticks out that someone sees and can point me in the right direction.
>
> -dan
>
> On Mar 31, 2020, at 7:15 PM, Alex Balashov <abalashov(a)evaristesys.com>
> wrote:
> >
> > Daniel,
> >
> > Might this article be of aid?
> >
> >
>
http://www.evaristesys.com/blog/server-side-nat-traversal-with-kamailio-the…
> >
> > -- Alex
> >
> >> On Tue, Mar 31, 2020 at 11:12:23PM +0000, Daniel W. Graham wrote:
> >>
> >> It does but doesn't work as well as kamailio, and since the proxy is
> the entry point.
> >>
> >> The biggest issue here isnt the keepalive, as I did have that working.
> The main issue is the routing of messages, utilizing set_contact_alias and
> handle_ruri_alias, as Ive been unable to get ack and bye messages to make
> it past the proxy. I’m assuming these functions are not being used at the
> right locations or I need to rely on another mechanism to accomplish it. I
> also question my use of the PBX flag and the natmanage logic.
> >>
> >> -dan
> >>
> >> On Mar 31, 2020, at 7:01 PM, Sergiu Pojoga <pojogas(a)gmail.com> wrote:
> >>
> >>
> >> Hi Daniel,
> >>
> >> From what you are describing, my understanding is that the Registrar is
> the PBX, kamailio is acting as an edge proxy. If so, doesn't the
> PBX/registrar have NAT traversal/keepalive mechanisms of its own?
> >>
> >> Regards,
> >> --Sergiu
> >>
> >> On Tue, Mar 31, 2020 at 1:55 PM Daniel W. Graham <dan(a)cmsinter.net
> <mailto:dan@cmsinter.net>> wrote:
> >> I’ve been missing with this for a while and seem to be missing
> something. Any suggestions on what is missing here?
> >>
> >> Trying to use set_contact_alias() and handle_ruri_alias() from
> nathelper module and nat_keepalive from nat_traversal module, without
> registrar.
> >>
> >> I had register keepalive working, that has since broke. When register
> keepalive was working, I was able to place call in either direction but ACK
> and BYE was not being routed past kamailio.
> >>
> >> Registrations are forwarded to the PBX using add_path() and is working.
> >>
> >> Also not included below is the routing to the PBX, that is just setting
> $du and t_relay, and is also working.
> >>
> >> Topology is: UA1 -> NAT -> kamailio -> PBX -> UA2
> >>
> >> Using default config file as the example, modified with above changes.
> I also removed RTP config as that is a non-issue.
> >>
> >> request_route {
> >> ……
> >> # FLAG MESSAGES FROM PBX
> >> setflag(FLT_PBX);
> >> route(NATDETECT);
> >> ……
> >>
> >> route[NATDETECT] {
> >> if (nat_uac_test("19")) {
> >> force_rport();
> >> set_contact_alias();
> >> nat_keepalive();
> >> }
> >> return;
> >> }
> >>
> >> route[WITHINDLG] {
> >> if (!has_totag()) return;
> >> if (loose_route()) {
> >> route(DLGURI);
> >> } else if ( is_method("ACK") ) {
> >> route(NATMANAGE);
> >> } else if ( is_method("NOTIFY") ) {
> >> record_route();
> >> }
> >> route(RELAY);
> >> exit;
> >> }
> >>
> >> if (is_method("SUBSCRIBE") && uri == myself) {
> >> route(PRESENCE);
> >> exit;
> >> }
> >> if ( is_method("ACK") ) {
> >> if ( t_check_trans() ) {
> >> route(RELAY);
> >> exit;
> >> } else {
> >> exit;
> >> }
> >> }
> >> sl_send_reply("404","Not here");
> >> exit;
> >> }
> >>
> >> route[NATMANAGE] {
> >> if(isflagset(FLT_PBX)) {
> >> handle_ruri_alias();
> >> }
> >> if(!isflagset(FLT_PBX)) {
> >> set_contact_alias();
> >> } return;
> >> }
> >>
> >> route[DLGURI] {
> >> if(!isdsturiset()) {
> >> handle_ruri_alias();
> >> }
> >> return;
> >> }
> >>
> >> branch_route[MANAGE_BRANCH] {
> >> route(NATMANAGE);
> >> }
> >>
> >> onreply_route[MANAGE_REPLY] {
> >> if(status=~"[12][0-9][0-9]") {
> >> route(NATMANAGE);
> >> }
> >> }
> >> failure_route[MANAGE_FAILURE] {
> >> route(NATMANAGE);
> >>
> >> if (t_is_canceled()) exit;
> >>
> >>
> >> -dan
> >>
> >> _______________________________________________
> >> Kamailio (SER) - Users Mailing List
> >> sr-users@lists.kamailio.org<mailto:sr-users@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
> >
> >> _______________________________________________
> >> 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
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