Recently "inherited" a network at an organization. Organization has a SonicWALL TZ500 NSA at headquarters location, as well as remote locations that all have SonicWALL TZ170s at their respective locations creating site-to-site VPNs with HQ NSA. These remote offices all have 9608 model phones. I'd like to do away with the firewalls at the remote offices so that the site-to-site VPNs do not have to be built for the phones to connect to to server. My question is what port, or range of ports, do I need to open/NAT on the SonicWALL TZ500 here at the corporate office.
Thanks.
Thanks.
