Asterisk NAT issue

1.8.23.0

Dear All,
My setup involves zentyal which serves as “router” and asterisk 1.8.23.0 Im trying to get inbound trunk working but with no success.
This is my carier setup:

register => username:pass@voip.provider.com/trunkinbound

[voipinbound]
host=voip.provide.com
username= username
secret=pass
allow=ulaw,alaw
context=trunkinbound
insecure=port,invite
type=friend
dtmfmode=rfc2833
nat=yes
trustrpid=yes

sip show registry shows that carier is registered ok

I get this error in CLI:
Failed to authenticate device “numer_im_calling_from” sip:numer_im_calling_from@router_ip:1028;tag=as3efa5308

if i change host to my router_ip the calls gets connected but dropped due to lack of packets.

Can you please guide me if I can solve it on asterisk side?

Disable the SIP support on the router.