Watchguard XTM 23 series - Dynamic DNS for VPN possible?

We are planning to get a branch office model of Watchguard XTM 23 for firewall and VPN tunnel to the branch office.

At our main office the Internet link is on static IP, but for the branch office we are thinking of the much cheaper Dynanic IP plan.

Can the VPN be supported on Dynamic DNS? we can pay for a subscription to e.g. dyn.com for Dynamic DNS hosting.

Question is whether the VPN supports Dynamic DNS?

Thanks.
Joo
sidartraAsked:
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msidnamCommented:
What version of WSM and OS do you have? i found this but i have never done it before. i always use static IP's. However, if the firewall has the option the only thing i can think of that might be an issue is that if the IP changes and the DYDNS site hasnt updated the change you might have a small period of time where its still pointing to the old ip. i'm also assuming this is for end user VPN and not a BOVPN.

Set up dynamic DNS [Fireware XTM v11.4.x-v11.5.x]
Answer      
You can register the external IP address of the XTM device with the dynamic Domain Name Server (DNS) service called Dynamic Network Services (DynDNS). This is a free service for a maximum of two host names. WatchGuard does not support any other dynamic DNS providers and is not affiliated with DynDNS.com.

A dynamic DNS service makes sure that the IP address attached to your domain name changes when your ISP gives your XTM device a new IP address. You must create a DynDNS account and set up at least one DNS server before you can configure dynamic DNS on your XTM device.

For more information on configuration options, or to set up a Dynamic DNS account, visit http://www.dyndns.com.

To set up dynamic DNS with Policy Manager:
Select Network > Configuration. Click the WINS/DNS tab, then click the Dynamic DNS tab.
Select the external interface you want to configure dynamic DNS for and click Configure. Select the Enable Dynamic DNS check box.
Type the user name, password, and domain name you used to set up your dynamic DNS account. Select the correct Service Type and type any Options that you have configured.
To set up dynamic DNS with Fireware XTM Web UI:
Select Network > Dynamic DNS.
Select the external interface you want to configure dynamic DNS for and click Configure. Select the Enable Dynamic DNS check box.
Type the user name, password, and domain name you used to set up your dynamic DNS account. Select the correct Service Type and type any Options that you have configured.
For step-by-step instructions, or to learn more about dynamic DNS options with Policy Manager, see:
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msidnamCommented:
Sorry, i forgot to cut out the last sentence,
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setasoujiroCommented:
I've done several BOVPN with DynDNS and it's not a problem, be sure to set the refreshtime of the dynDNS to 1 day on the watchguard.

Also make sure that when using a cheaper connection (dyn IP) the IPSEC ports are not filtered, as they are somtimes in some countries/ISP
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