Hi, 

I'm trying to achieve this configuration 

phone --> NAT --> kamailio loadbalancer --> kamailio sip/proxy 

           --> kamailio sip/proxy

 

With the attached configuration I can make calls without any problems 

but when the callee hangs up the call does not end only the caller can hang up.

Btw I'm using tcp for signalling.

Any ideas?

Thanks

#!define FLT_ACC 1

#!define FLT_ACCMISSED 2

#!define FLT_ACCFAILED 3

#!define FLT_NATS 5

#!define FLB_NATB 6

#!define FLB_NATSIPPING 7

mhomed=1

####### Global Parameters #########

#!ifdef WITH_DEBUG

debug=4

log_stderror=yes

#!else

debug=2

log_stderror=no

#!endif

memdbg=5

memlog=5

log_facility=LOG_LOCAL0

fork=yes

children=4

tcp_async=yes

tcp_connection_lifetime=3605

port=5060

sip_warning=yes

####### Modules Section ########

#!ifdef WITH_SRCPATH

mpath="modules_k:modules"

#!else

mpath="/usr/lib/x86_64-linux-gnu/kamailio/modules/"

#!endif

loadmodule "db_mysql.so"

loadmodule "mi_fifo.so"

loadmodule "kex.so"

loadmodule "tm.so"

loadmodule "tmx.so"

loadmodule "sl.so"

loadmodule "rr.so"

loadmodule "pv.so"

loadmodule "maxfwd.so"

loadmodule "textops.so"

loadmodule "siputils.so"

loadmodule "xlog.so"

loadmodule "sanity.so"

loadmodule "ctl.so"

loadmodule "mi_rpc.so"

loadmodule "acc.so"

loadmodule "usrloc.so"

loadmodule "registrar.so"

loadmodule "dispatcher.so"

loadmodule "nathelper.so"

loadmodule "rtpproxy.so"

loadmodule "path.so"

# ----------------- setting module-specific parameters ---------------

# ----- mi_fifo params -----

modparam("mi_fifo", "fifo_name", "/var/run/kamailio/kamailio_fifo")

# ----- rr params -----

# add value to ;lr param to cope with most of the UAs

modparam("rr", "enable_full_lr", 1)

# do not append from tag to the RR (no need for this script)

modparam("rr", "append_fromtag", 1)

modparam("rr", "enable_double_rr", 0)

# ----- tm params -----

modparam("tm", "failure_reply_mode", 3)

modparam("tm", "fr_timer", 3000)

modparam("tm", "fr_inv_timer", 120000)

# ----- dispatcher params -----

modparam("dispatcher", "db_url",

"mysql://kamailio:kamailiorw@localhost/kamailio")

modparam("dispatcher", "table_name", "dispatcher")

modparam("dispatcher", "flags", 2)

#modparam("dispatcher", "force_dst", 1)

modparam("dispatcher", "setid_col", "setid")

modparam("dispatcher", "destination_col", "destination")

modparam("dispatcher", "flags_col", "flags")

modparam("dispatcher", "priority_col", "priority")

modparam("dispatcher", "dst_avp", "$avp(AVP_DST)")

modparam("dispatcher", "grp_avp", "$avp(AVP_GRP)")

modparam("dispatcher", "cnt_avp", "$avp(AVP_CNT)")

modparam("path", "use_received", 1)

modparam("registrar", "use_path", 1)

modparam("registrar", "path_mode", 0)

modparam("registrar", "path_use_received", 1)

modparam("nathelper", "natping_interval", 30)

modparam("nathelper", "ping_nated_only", 1)

modparam("nathelper", "sipping_bflag", FLB_NATSIPPING)

modparam("nathelper", "sipping_from", "sip:pinger@kamailio.org")

# params needed for NAT traversal in other modules

modparam("nathelper|registrar", "received_avp", "$avp(RECEIVED)")

modparam("usrloc", "nat_bflag", FLB_NATB)

####### Routing Logic ########

# main request routing logic

request_route {

xlog("L_NOTICE", "*** loose routing enforced before: $rm, $ru, $si, $du\n");

# per request initial checks

route(REQINIT);

loose_route();

# handle requests within SIP dialogs

route(WITHINDLG);

### only initial requests (no To tag)

# CANCEL processing

if (is_method("CANCEL"))

{

if (t_check_trans())

t_relay();

exit;

}

t_check_trans();

# record routing for dialog forming requests (in case they are routed)

# - remove preloaded route headers

#remove_hf("Route");

if (is_method("INVITE")){

record_route();

}

if(is_method("REGISTER")){

add_path_received();

fix_nated_register();

}

else{

add_contact_alias();

}

# dispatch destinations

route(DISPATCH);

route(RELAY);

}

route[RELAY] {

if (!t_relay()) {

sl_reply_error();

}

exit;

}

# Per SIP request initial checks

route[REQINIT] {

if (!mf_process_maxfwd_header("10")) {

sl_send_reply("483","Too Many Hops");

exit;

}

if(!sanity_check("1511", "7"))

{

xlog("L_NOTICE", "*** loose routing enforced before: $rm, $ru, $si, $du\n");

xlog("Malformed SIP message from $si:$sp\n");

exit;

}

}

# Handle requests within SIP dialogs

route[WITHINDLG] {

if (has_totag()) {

# sequential request withing a dialog should

# take the path determined by record-routing

if (loose_route()) {

if (is_method("BYE")) {

setflag(1); # do accounting ...

setflag(3); # ... even if the transaction fails

}

route(RELAY);

} else {

if (is_method("SUBSCRIBE") && uri == myself) {

# in-dialog subscribe requests

#route(PRESENCE);

exit;

}

if ( is_method("ACK") ) {

if ( t_check_trans() ) {

# non loose-route, but stateful ACK;

# must be ACK after a 487 or e.g. 404 from upstream server

t_relay();

exit;

} else {

# ACK without matching transaction ... ignore and discard.

exit;

}

}

sl_send_reply("404","Not here");

}

exit;

}

}

# Dispatch requests

route[DISPATCH] {

# round robin dispatching on gateways group '1'

if(!ds_select_domain("1", "0"))

{

send_reply("404", "No destination");

exit;

}

xlog("L_DBG", "--- SCRIPT: going to <$ru> via <$du>\n");

t_on_failure("RTF_DISPATCH");

return;

}

# Sample failure route

failure_route[RTF_DISPATCH] {

if (t_is_canceled()) {

exit;

}

# next DST - only for 500 or local timeout

if (t_check_status("500")

or (t_branch_timeout() and !t_branch_replied()))

{

if(ds_next_domain())

{

xlog("L_NOTICE", "going to next dst\n");

t_on_failure("RTF_DISPATCH");

route(RELAY);

exit;

}

}

}