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thank all for answering my question. The static IP address is more expensive in our country so we have dynamic IP. If Hub router has static IP, of course, l can configure easily, there is other solution is to configure dynamic DNS so on spokes we need configure DNS name instead of IP address.
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Hello all my company has 3 branches, all branches connect to internet by PPPoE with dynamic ip address l would like to configure DMVPN and IPsec do you have any solution about this ?
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Hello all my company has 3 branches, all branches connect to internet by PPPoE with dynamic ip address l would like to configure DMVPN and IPsec do you have any solution about this ?

Cisco PIX is a dedicated hardware firewall appliance; the Cisco Adaptive Security Appliance (ASA) is a firewall and anti-malware security appliance that provides unified threat management and protection the PIX does not. Other Cisco devices and systems include routers, switches, storage networking, wireless and the software and hardware for PIX Firewall Manager (PFM), PIX Device Manager (PDM) and Adaptive Security Device Manager (ASDM).

Cisco

A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or travelling users access to a central organizational network securely. VPNs encapsulate data transfers using secure cryptographic methods and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted.