[Asterisk-Users] registration at Voipbuster times out

[Remko Muis]

Hi, 

I am new here on this list, and have a problem of which I hope that somebody here can help me with it. 
I have a Voipbuster account, with which I would like to make phone calls via my Asterisk PBX. If I let X-Lite register directly at voipbuster.com, everything is OK, but if I let Asterisk register there, it says "registration for XXXXXX at sip.voipbuster.com timed out, trying again", even though all settings are precisely as in X-Lite (username, password, and sip-proxy settings). Also I am sure the right ports are forwarded or open, both in my router and in iptables (firewall of Asterisk server). The log files of X-Lite and the output of "sip debug" show no differences, except this one: 

    Contact: Remko <sip:XXXXXX@[INTERN IP OF X-LITE-PC]:5060>

in the log of X-lite and the following line in sip debug: 

    Contact:<sip:s@[MY EXTERN IP]>

I don't know whether this is a significant difference. 
For further info, here is my sip.conf: 

bindport=5060 
bindaddr=0.0.0.0 
externip=EXTERNIP 
localnet=192.168.1.0/255.255.255.0 
srvlookup=yes 
maxexpirey=180 ; Maximum length of incoming registration we allow 
defaultexpirey=160 ; Default length of incoming/outgoing registration 
language=nl 

;register to the voipbuster service 
register => XXXXXX:YYYYYY at sip.voipbuster.com 

;Add an extension for our softphone 
;Copy this and change 1234 into 1235 for a second softphone (etc) 
[1234] 
type=friend 
username=1234 
secret=ZZZZZZ ; this is the .password. Change this !! 
callerid=Remko 
notransfer=yes 
insecure=very 
host=dynamic 
;canreinvite=no 
context=default 

[1235] 
type=friend 
username=1235 
secret=ZZZZZZ; this is the .password. Change this !! 
callerid=Remko 
notransfer=yes 
insecure=very 
host=dynamic 
;canreinvite=no 
context=default 

;Configure the incoming calls connection 
[voipbuster-in] 
type=user 
host=sip.voipbuster.com 
secret=YYYYYY 
realm=voipbuster.com 
fromuser=XXXXXX 
fromdomain=sip.voipbuster.com 
context=incoming 
canreinvite=no 
insecure=very 
qualify=no 
nat=yes 
dtmfmode=inband 
disallow=all 
allow=alaw 
allow=ulaw 
call-limit=5 

;Configure the outgoing calls connection 
[voipbuster-out] 
type=peer 
host=sip.voipbuster.com 
username=XXXXXX 
fromuser=XXXXXX 
fromdomain=sip.voipbuster.com 
secret=YYYYYY 
realm=voipbuster.com 
call-limit=5 
dtmfmode=inband 
context=default 
insecure=very 
qualify=no 
nat=yes 
canreinvite=no 
disallow=all 
allow=alaw 
allow=ulaw 

I am completely at a loss, hope somebody can help me here! 

Yours sincerely, 
Remko
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