1 Apr
2020
1 Apr
'20
3:48 a.m.
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:
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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
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--
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/
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