DDNS update frequency with dynamic IP
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23-07-2025 5:52 PM
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I'm in a similar situation to the post raised by Stonehouse (ie currently on FTTC with fixed IP but upgrading to FTTP). However because of some weird conflict with the Plusnet v Openreach address databases I'm having to cancel my current account and sign up for a new one, so I assumed I'll lose fixed IP as it's no longer offered. This isn't really a problem as I can resolve my WAN name to "today's" IP using my hosting site's DDNS feature in cPanel.
My question is - how often is my public IP address likely to change? I'd like to call the DDNS refresh at roughly the same interval. Does once a day sound reasonable?
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Re: DDNS update frequency with dynamic IP
23-07-2025 8:32 PM
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If you get a free hostname with no-ip.com, they have a bit of software you can run that uploads any dns change no more than 5 minutes after it happens.
Mark
Re: DDNS update frequency with dynamic IP
24-07-2025 11:09 AM
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Yes I've used no-ip in the past but I think the free account needs manually confirming once a month.
Hardly a big deal, but my host's free DDNS lets me use my own domain name.
Once my FTTP is live I can log how often the address changes. I assume it's no more frequent than the DNS lease period - is that known?
24-07-2025 12:07 PM
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My understanding is that it will not change unless the connection is dropped. Even then your IP address is drawn from a small local pool, so you might well pick up the same one again.
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Re: DDNS update frequency with dynamic IP
24-07-2025 7:18 PM
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@Baldrick1 wrote:
Even then your IP address is drawn from a small local pool, so you might well pick up the same one again.
I have never been re- issued with the same ip address when the connection has dropped, router re- booted with Plusnet, must just be unlucky. Sky was very sticky and I had the same one for 18 months,
Mark
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