16 Aug
2020
16 Aug
'20
9:07 p.m.
What are your thoughts on architecture build of the following scenarios.
The PBX doesn’t support websockets and we want to use sip.js / jsSip. (use Kama as
wss:// SIP proxy)
PBX has direct PRI/sip Trunks/ DID control/ Voicemail.
PBX hosts SIP extensions.
UA --> Kamailio --> PBX
--------SCENARIO A.) ------- Host SIP[xxxx] extensions on Kama box but same SIP
extensions are also on PBX [xxxx]
1. Build some sort of control to register handle kama to pbx …. (but reg webclients)
Kama [1100] SIP-PBX [1100]
Does kama act as the UA 1100 / registered to PBX
What about UA to kamailio (do we do 1100a so UA-kama is 1100a) but kama is maintain
REG/status/ but passing that IF client is online ?
MWI (voicemail is hosted on PBX) so how does that move through can it.
------- SCENARIO B.) ------ Proxy all/ everything . use route[REGFW] Forward all REG to
PBX..
Issues ----
MWI (SIP notify ?)
SIP Incoming CALL incoming calls to work. (if UA holds REG to outbound proxy on PBX
or )
DTMF (sipINFO) doesn’t work (I see it sending)
I noticed I crashed the PBX because all the SIP scanners started pounding my Kamailio box
after 2 days when I added route[REGFW] it starting eating up SIP trunk channels on PBX
cause started forwarding everything. Like it starting 4241(a)xxxxx.com 4242(a)xxxxx.com .
Or might need to look at fail2ban pike module to oget this but still had issues I just
don’t know where to look or code to fix on SCENARIO B
Snippets on my testing .
route[REGFWD] {
if(!is_method("REGISTER"))
{
return;
}
$var(rip) = $sel(cfg_get.PBX.bindip);
$uac_req(method)="REGISTER";
$uac_req(ruri)="sip:" + $var(rip) + ":" +
$sel(cfg_get.PBX.bindport);
$uac_req(furi)="sip:" + $au + "@" + $var(rip);
$uac_req(turi)="sip:" + $au + "@" + "kamaproxy";
# $uac_req(turi)="sip:" + $au + "@" + $var(rip);
$uac_req(hdrs)="Contact: <sip:" + $au + "@"
+ $sel(cfg_get.kamailio.bindip)
+ ":" +
$sel(cfg_get.kamailio.bindport) + ">\r\n";
if($sel(contact.expires) != $null)
$uac_req(hdrs)= $uac_req(hdrs) + "Expires: " +
$sel(contact.expires) + "\r\n";
else
$uac_req(hdrs)= $uac_req(hdrs) + "Expires: " +
$hdr(Expires) + "\r\n";
uac_req_send();
}
#!endif
---------------
So this led me to extra security should I host SIP extensions on kamailio as an extra
security but then what about MWI/inbound then) or do I have 1100 on kama which mitel is
1100 but I pass all info from inbound.