added EdgeRouter - Custom Dynamic DNS with CloudFlare

src/moreCategories/ubiquiti.md

@@ -112,6 +112,36 @@ set system offload ipsec disable
 commit ; save
 ```
 
+## update
+
+* __subdomain.domain.com__: Dedicated subdomain for the DDNS
+* __zone=domain.com__: Main Domain
+* _user@domain.com_: CloudFlare Email
+* CloudFlare API Key: API key generated by Cloudflare.
+
+```bash
+configure
+set service dns dynamic interface eth0 service custom-cloudflare host-name <subdomain.domain.com>
+set service dns dynamic interface eth0 service custom-cloudflare login <user@domain.com>
+set service dns dynamic interface eth0 service custom-cloudflare password <CloudFlare API Key>
+set service dns dynamic interface eth0 service custom-cloudflare protocol cloudflare
+set service dns dynamic interface eth0 service custom-cloudflare options zone=domain.com
+commit ; save
+```
+
+### Test the Dynamic DNS Status
+
+```bash
+show dns dynamic status
+```
+
+Output should be:
+> interface    : eth0
+> ip address   : <PublicIP>
+> host-name    : <domain>
+> last update  : Thu Mar 30 13:29:42 2018
+> update-status: good
+
 ## EdgeRouter OpenVPN Configuration 443/TCP
 
 This Guide is based on [Original guide form ubnt support](https://help.ubnt.com/hc/en-us/articles/115015971688-EdgeRouter-OpenVPN-Server) with modifications to the VPN port and protocol