Voipvoip.com SIP registration fails

Hi all,

When I try to register with my voipvoip.com account I get failure notice in CLI like below.

[Aug 21 21:27:13] NOTICE[3384]: chan_sip.c:10703 sip_reg_timeout: – Registration for '555XXXXXXX@sip3.voipvoip.com’ timed out, trying again (Attempt #40)
> doing dnsmgr_lookup for ‘sip3.voipvoip.com

Asterisk version: 1.6.1.13

Registration string : “register=>555XXXXXXX:PASS@sip3.voipvoip.com/555XXXXXXX”

Peer and User details:

;Peer Details
[komturk_peer]
username=555XXXXXXX
type=peer
secret=PASS
nat=auto
insecure=port
host=sip3.voipvoip.com
fromuser=555XXXXXXX
fromdomain=sip3.voipvoip.com
dtmfmode=rfc2833
disallow=all
allow=g729
allow=ilbc
allow=ulaw
allow=alaw

;USER Details
[komturk_user]
username=555XXXXXXX
type=user
secret=PASS
nat=auto
insecure=port
host=sip3.voipvoip.com
fromdomain=sip3.voipvoip.com
dtmfmode=rfc2833
disallow=all
context=from-trunk
allow=g729
allow=ulaw
allow=alaw
allow=ilbc

In forums and voipvoip.com support site told these settings enough for registration. Is there anything I made wrong?

Firewall or NAT problem.

Incidentally insecure=port is strange. I think it is almost certainly wrong, but but the associated problems will not affect registration.

Noting that nat= is greatly misused, and intended for when you are outside and they are inside, do you have any outgoing NAT options (localnets, extenhost/externip/stunaddr), or are you using routable addresses, directly.

I tried my account with Yealink SIP-T22P and that worked. Is is possible using asterisk rather than a VoIP phone couse that kind of problem?