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@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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