NAT issue on rv345(Router91B91A) with a firmware version of 1.0.03.15

[trik]

I am having an issue regarding NAT of RV345. The telco showed trace logs that they can see the private ip which is supposedly the public ip. Is there something wrong with this model or firmware version? TIA. Hope you can help me with this. 

[balaji.bandi]

is this new installation or working one broken ?

can you pot you confiuration screenshot

[trik]

New installation. This router is configured for sip. The outbound is working and inbound is not working. Upon checking by Telco. They saw that the problem is the NAT. 

[balaji.bandi]

Just make clarity, you browsing working fine, and you have SIP calling issue ?

[trik]

Yes, Sip calling issue in inbound calls

[trik]

Hello @balaji.bandi . Hope you can help me. Here is the scenario. We can make outbound call but inbound is not working. Upon checking of Telco, they supposed to see the assigned ip in wan interface of WAN1 of RV345 but they saw the private ip address. What could possibly wrong? When I enabled Sip ALG, the NAT translation works but there is another problem in outbound call. Only 1 way is allowed but the incoming is working fine.