[sr-dev] [Urgent] Double REGISTER and MESSAGE issue in Kamailio3.1

[Coca]

Dear List,

I have Kamailio 3.1 installed in Amazon EC 2 server.
Everything is working fine except that every REGISTER / MESSAGE was looped
for twice or 3 times.
And I am sure this is not caused by UA.

I have attached the ngrep log in this message.
And also, my main modification to the kamailio.cfg is like below:

Your help will be great great appreciated.

Thank you!!

Coca





----------------------------------

#!define WITH_MYSQL
#!define WITH_NAT


alias="mydomain.org"
alias="xx.xx.xx.xx"

advertised_address="xx.xx.xx.xx"

...
...

route {

# per request initial checks
route(REQINIT);

# NAT detection
route(NAT);

# 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();

# authentication
route(AUTH);

# record routing for dialog forming requests (in case they are routed)
# - remove preloaded route headers
remove_hf("Route");
if (is_method("INVITE|SUBSCRIBE"))
{
#record_route();
/* for NAT support */
record_route_preset("xx.xx.xx.xx");
}

# account only INVITEs
if (is_method("INVITE"))
{
setflag(FLT_ACC); # do accounting
}

# dispatch requests to foreign domains
route(SIPOUT);

### requests for my local domains

# handle presence related requests
route(PRESENCE);

# handle registrations
route(REGISTRAR);

if ($rU==$null)
{
# request with no Username in RURI
sl_send_reply("484","Address Incomplete");
exit;
}

# dispatch destinations to PSTN
route(PSTN);

# user location service
route(LOCATION);

route(RELAY);
}



# Handle SIP registrations
route[REGISTRAR] {
if (is_method("REGISTER"))
{
if(isflagset(FLT_NATS))
{
setbflag(FLB_NATB);
# uncomment next line to do SIP NAT pinging
setbflag(FLB_NATSIPPING);
}
 if (!save("location"))
sl_reply_error();

exit;
}
}
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