Well, this may be even easier:
Install autoip module, this will update your IP on the ZPanel server if it changes. (Not sure how it works for multiple IPs though-I think it only updates IPs that get changed by using a find/replace type of edit in the DB)
Next, use a service like no-ip.org or dynDNS to update the domain's external IP to match the server IP.
Although Me.B may have abetter idea
LOL posted same time as MeB
Install autoip module, this will update your IP on the ZPanel server if it changes. (Not sure how it works for multiple IPs though-I think it only updates IPs that get changed by using a find/replace type of edit in the DB)
Next, use a service like no-ip.org or dynDNS to update the domain's external IP to match the server IP.
Although Me.B may have abetter idea
LOL posted same time as MeB