May i ask how to setup Sophos UTM to SOphos UTM IPsec VPN site to site. Main UTM has public IP and the other UTM has dynamic IP. appreciate any advice.
First make sure to use the same policies on both ends. Second set-up the remote gateway on the fixed IP side as Respond Only so it will respond to a IPSEC request from the dynamic side. On the dynamic side you can create a remote gateway with Initiate so the dynamic side initiates a connection to the fixed side.
Thirdly configure the local and remote networks as you would with any other site-to-site VPN connection and either use Automatic firewall rule or create firewall rules yourself on both sides of the connection.
First make sure to use the same policies on both ends. Second set-up the remote gateway on the fixed IP side as Respond Only so it will respond to a IPSEC request from the dynamic side. On the dynamic side you can create a remote gateway with Initiate so the dynamic side initiates a connection to the fixed side.
Thirdly configure the local and remote networks as you would with any other site-to-site VPN connection and either use Automatic firewall rule or create firewall rules yourself on both sides of the connection.