change default dns port

Forum|Forum|10 years ago
March 31, 2016
5 replies
7390 views

Hi

Im having troubles configuring DDNS on my fortigate. My ISP is blocking dns for fortigates servers 208.91.112.53 and 208.91.112.53. Is there a way to configure DDNS with my ISPs dns server? Can i change the default port fortigates uses for dns?

thanks

Carlos

Best answer by Dave_Hall

The Fortigate only supports DDNS services whose client software is built-in into the fgt firmware. Just configure your fgt to use one of the officially supported DDNS services. If your ISP is forcing you to use their DNS servers then by all means do that -- all you are really doing with DDNS is "updating" an outside DNS record with your public IP - your ISP's DNS servers should still be able to "resolve" the FQDN hostname back to your public IP address.

Dave_HallAnswer

New Member

The Fortigate only supports DDNS services whose client software is built-in into the fgt firmware. Just configure your fgt to use one of the officially supported DDNS services. If your ISP is forcing you to use their DNS servers then by all means do that -- all you are really doing with DDNS is "updating" an outside DNS record with your public IP - your ISP's DNS servers should still be able to "resolve" the FQDN hostname back to your public IP address.

nordik24Author

New Member

but if i want to use Foriguards DDNS, is it then required to have fortinets DNS servers? I ask because when i choose to specify DNS servers the option for using fortiguards DDNS disappears

/carlos

rwpatterson

New Member

nordik24 wrote:
but if i want to use Foriguards DDNS, is it then required to have fortinets DNS servers? I ask because when i choose to specify DNS servers the option for using fortiguards DDNS disappears

/carlos

Looks like you are confusing two issues:

[ul]

DNS (Domain Name Service) simply resolves IP addresses from fully qualified domain names. Your ISP will usually only allow their servers or possibly an open DNS server for DNS resolution.

DDNS (Dynamic Domain Name Service) will dynamically map your IP address to a name (to be used in DNS lookups).[/ul]

Once the DNS issue is straightened out and the FGT is able to resolve names, then the FGT will resolve your DDNS server's name and your DDNS registration should take place.

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