Cisco ASA 5505 – IP Sec Tunnel with dynamic IP

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    We have a Cisco ASA 5505 at our main office. In our orginistaion we have 4 remote offices that connect into our main office using LAN to LAN IP-Sec. The remote offices use a range of devices from Netgear to Cradlepoint and have been working perfectly for the past 1 year.

    Until recently all our remote offices had static IP. Now we are faced with not being able to have static IP anymore which is causing us issues with the VPN. What we are having to do is manually update the ASA5505 each time the router at the other office goes off line or the ISP issues a new IP address which is not practicle.

    What I would like to know is how can we update our ASA 5505 with the public IP numbers from our remote sites using a DDNS service like DYNDNS for example. We have reseacched and looked but can’t find much on this subject.

    If someone can help here that would be great or if there are any other suggestions to get us around this issue.



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