Selfhosted @lemmy.world Hemlig @lemmy.world 1 yr. ago

Real domain with dynamic IP

I got a homelab, at the moment I am only running some local stuff and tailscale to reach my stuff remotely.

I can use tailscales ddns, but I would like a real domain. Is there a domain registrator that works with dynamic ips? Or do I need to use a CNAME instead of A record?

62 comments

It really depends on the company that you use to manage the domain's DNS. As long as they have an API to update DNS records..

For example, I can have my domain at Porkbun and have its DNS managed at Cloudflare. Cloudflare allows updating DNS records via API..so there's programs to update it. Some routers even support it.

Worst case, you can set up a service like duckdns and have your domain, via cname, point to the duck DNS subdomain.

There's options.
- Porkbun also has an api for updating records.
- I think using the cloudflare API is the way to go. You could probably set up an internal service that translates your home router's dyndns request to a cloudflare API call.
  
  Only if you had root access to your router. It’s a lot easier to write or find a very simple update script and schedule it to run every now and then via crontab.
There are many ways to update dns automatically, I have used this container in the past. You could probably even write a bash script/cron job that checks your IP and updates it with curl depending on your DNS provider.

If you are already running tailscale you may be interested in using a funnel, which lets you accept and route internet traffic to your tailnet. I don't use tailscale so can't comment on how good/bad/useful this is.

You could also run some sort of service like frp from some remote box (like a VPS in DO/Linode/etc). This or the funnel lets you not expose/advertise your home IP address if that is a consideration.
- Oooh thanks for the tip about frp. Interesting.
  
  I usually use autossh to establish a persistent port tunneling but sometimes got frustrated with the performance of the encrypted tunnel for some use case. Sometimes I don't need encryption, but need to saturate my nic. frp seems to fit this use case.
  
  I actually just migrated things to a setup that is pretty neat using FRP: I run frps on 2 Linodes in the same datacenter and have set up IP sharing for failover between them (which is a neat feature Linode, Vultr and probably a few others offer), and then I run 4 frpc's, two for each frps in case one of them breaks somehow. Lots of redundancy without all that much effort.
Cloudflare, Porkbun, Namecheap and many other registrars offer dynamic DNS via API or a ddns client very easy to setup.
All domains works with Dynamic IPs - it all depends on what DNS-provider you use :) Provider like Cloudflare ( I do not recommend Cloudflare) and afraid.org both offer dynamic DNS.
- Why don't you recommend Cloudflare?
  
  It is a giant MITM proxy, and whoever who has access to their logs have the potential to gain a lot of control
  
  Its market share defeats the point of self-hosting.
- Do you recommend afraid.org?
  
  Afraid.org is great :) I do recommend
- Yea, that's right. What I was looking for was like one stop shop. Where I can pay for my domain and dns needs. My current domain registrator does not have dynamic dns, so I have to use a CNAME from another place with a ddns.
  
  Since your name is Hemlig, I assume you are from the Nordics. Loopia has support for dynamic DNS.
CloudFlare ZT tunnels coupled with an Azure AD. Work’s amazingly with their containers to keep the tunnel alive.
- What is Azure being used for?
  
  using azure ad for user authentication. azure ad is free but i have a paid o365 so i use that to authenticate against for access to my containers that have a fqdn attached/directed to it. and most of the containers/apps have sso with azure ad integration option available so no more logging into each single app/container.
ZoneEdit.com has a free plan with dynamic DNS for at least one „real“ domain (domain registration not included). It‘s not the most user friendly UI but super powerful. You can pretty much add any DNS record you like.
Does your ISP support IPv6?
- Silly as it is, many ISPs hand out dynamic IPv6 prefixes that may change once in a while. Or "dynamic" prefixes that never seem to change (but are not guaranteed never to change).
  
  The reason is of course that they like being able to charge extra for static IPv4 addresses, and they see no reason to get rid of that revenue source for IPv6.
- I think I can ask them about it. Never really used ipv6. Maybe that's even better. Then I can maybe use more than one IP even. I don't know how the ISPs deal with it. Do I only get one for my router, or can I get a bunch of them.. hmm
  
  with IPv6 you are able to address your internal network devices directly without port forwarding. Just make sure your router and other gear support it so you have everything you need.
Do you want the host to be accessible fully from any host, or do you control all hosts you want to access it?

For mine, all the devices I want to access my personal host I have setup zerotier, and then pointed cloudflare at my zerotier address.

Any device I want to access my host (outside of my local network) requires zerotier.

I don’t want anything outside of my control accessing my host
I used No-IP for this very thing many years ago (using a domain on a server with a dynamic IP, anyway). I don't know how it is now, but a quick search shows it is still around.
- No-IP has been great for me for about a year now. No complaints.
CloudFlare ZT tunnels coupled with an Azure AD. Work’s amazingly with their containers to keep the tunnel alive.
If you don’t mind that it’s Google, then Google Domains has exactly what you’re looking for.
- They literally just killed that.
  
  Well shit, I guess I gotta start looking for a replacement. It’s one of the few Google services I still use.
  
  Thanks for the heads up, must has missed that news.
  
  They killed Google Domains?!
I use cloud flare DNS and it has support for dynamic IPs, my current setup is through a plug-in in my PFSense router
Pro Dynamic DNS service from noip.com will let you have dynamic dns using your own domain names for $20/mo.
- $20/mo?! When free alternatives exist, why would anybody do this?
  
  noip is supported by almost all consumer routers, so you're probably paying for convenience. For homelabbers with a bit of scripting skill, it's completely unnecessary though.
  
  I am unaware of any free services that allow you to use your own domain.

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