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firebox manual vpn question

homebase device is a firebox 750e
branch office device is an x10

we have about 10 branch office vpn's connected right now using manual vpn's with static ip addresses on both sides.

i need to set up a vpn... 1 side static.... 1 side dynamic.

how do i do this.
the dynamic ip address will be on the side of the x10e router

im looking in my new gateway box for the x750e and is wants me to specify the local gateway which is simple enough.

for the remote gateway (dynamic ip) im getting confused.
it has 2 sections for required bullets.

first section is static or dynamic ip address ( i bulleted the ip address)

2nd section   Specify the gateway id for tunnel authentication... again i must bullet on of the options.
by ip address(since its dynamic i cant input an ip address)
second choice is by domain information... (what is this all about) firebox
1 Solution
As you have dynamic IP on x10; if you configure manual BOVPN with current public IP of x10; the VPN tunnel would break when IP changes.
You can purchase dynamic DNS service [eg, from]; where you would get a domain name which would remain constant. We can then use this FQDN instead of IP address and configure VPN tunnel.

Please update if you have dynamic DNS or need further help.

Thank you.
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