I’m sure I’m massively overthinking this, but any help would be greatly appreciated.
I have a domain name that I bought through NameCheap and I’ve pointed it to Cloudflare (i.e. updated the name servers). I have a Synology NAS on which I run Docker and a few containers. Up until now I’ve done this using IP addresses and ports to access everything (I have a Homepage container running and just link to everything from there).
But I want to setup SSL and start running Vaultwarden, hence purchasing a domain name to make it all easier.
I tried creating an A record in Cloudflare to point to the internal IP of my NAS (and obviously, this couldn’t be orange-clouded through CF because it’s internal to my LAN). I’m very reluctant to point the A record to the external IP of my NAS (which, for added headache is dynamic, so I’d need to get some kind of DDNS) because I don’t want to expose everything on my NAS to the Internet. In actual fact, I’m not precious about accessing any of this stuff over the internet - if I need remote access I have a Tailscale container running that I can connect to (more on that later in the post). The domain name was purely for ease of setting up SSL and Vaultwarden.
So I guess my questions are:
- What is the best way to go about this - do I create a DDNS on the NAS and point that external IP address to my domain in Cloudflare, then use Traefik to just expose the containers I want to have access to using subdomains?
- If so, then how do I know that all other ports aren’t accessible (I assume because I’m only going to expose ports 80 and 443 in Traefik?)
- What do other people see (i.e. outside my network) if they go to my domain? How do I ensure they can’t access my NAS and see some kind of page?
- Is there a benefit to using Cloudflare?
- How would Pi-hole and local DNS fit into this? I guess I could point my router at Pi-hole for DNS and create my A records on Pi-hole for all my subdomains - but what do I need to setup initially in Cloudflare?
- I also have a RPi that has a (very basic) website on it - how do I setup an A record to have Cloudflare point a sub-domain to the Pi’s IP address?
- Going back to the Tailscale thing - is it possible to point the domain to the IP address of the Tailscale container, so that the domain is only accessible when I switch on the Tailscale VPN? Is this a good idea/bad idea? Is there a better way to do it?
I’m sure these are all noob-type questions, but for the past 6-7 years I’ve purely used this internally using IP:port combinations, so never had to worry about domain names and external exposure, etc.
Many thanks in advance!
You only need to port forward if you want external access without using a VPN or something like that. Like if you wanted friends to be able to access your server for example.
Yes, but only if you want to port forward and have external access. If you want local access only then you don’t need port forwarding, DDNS, or any A records in cloudflare.
Assuming you did port forward 80/443, then the NAS admin wouldn’t be exposed since it’s on different ports.
Thanks. I realise they’re all pretty basic questions. But brace yourself: more are on their way!
So… no, I don’t want to give external access - I’m not running any services that anyone would want/need access to - other than perhaps my Jellyfin server, but not sure I even want anyone accessing that. So let’s assume for right now, no access to the outside world. Therefore, no port forwarding required.
So to get access to my internal network from the domain, do I simply setup local DNS records in something like Pi-hole, to point mydomain.com to the internal IP or my NAS? Kind of like a network-wide equivalent of modding the /etc/hosts file on my machine?
Perhaps a(nother) silly question but, what’s to stop me doing that now with a completely random domain name? Is there some kind of authentication I’d need to go through to prove that mydomain.com is, in fact, mine? Or does it simply not matter since it’s internal only?
If I’ve understood correctly, then, I don’t need Cloudflare at all in my setup if there’s no external access? Nothing to proxy, nothing to protect?
Assuming I get all of the above working and traffic routing to my containers, how would I then go about setting up SSL? Can that be done through Traefik rather than Cloudflare? Even if the domain isn’t external?
Yep exactly!
Nothing, it’s local to your network only so it only affects you. You could set
google.comto return whatever IP you want for example, but it would prevent you from actually accessing google.The only thing you need Cloudflare (or another DNS-01 supported service) for, is getting letsencrypt SSL certificates. Since it uses automatically generated public DNS records on your domain name to verify that you own it.
Yep it’s done through Traefik either way, their docs should have a section on SSL with cloudflare IIRC.
Absolute superstar, thanks for your help so far. I’ll make a start on some of this tomorrow and see how far I get — either with Traefik or NPM.
Do I need to do anything with the domain itself on Cloudflare at the moment? Or do I just leave it with its current A record pointing at an IP address (it was done as part of the setup in Cloudflare so I have no idea what that IP address is).
Obviously that domain in reality will just sit there doing nothing.
Yeah you can just leave it, delete the A record if you want to.
OK so made a start with this. Spun up a Pi-hole container, added mydomain.com as an A record in Local DNS, and created a CNAME for traefik.mydomain.com to point to mydomain.com.
In Cloudflare, I removed the mydomain.com A record and the www CNAME record.
Doing an nslookup on mydomain.com I get
Non-authoritative answer: *** Can't find mydomain.com: No answerWhich I guess is to be expected.
However, when I then navigate to http://traefik.mydomain.com in my browser, I’m met with a Cloudflare error page: https://imgur.com/XhKOywo.
Below is the docker-compose of my traefik container:
traefik: container_name: traefik image: traefik:latest restart: unless-stopped networks: - medianet ports: - 80:80 - 443:443 expose: - 8080 volumes: - /etc/localtime:/etc/localtime:ro - /var/run/docker.sock:/var/run/docker.sock:ro - /volume1/docker/traefik:/etc/traefik - /volume1/docker/traefik/access.log:/logs/access.log - /volume1/docker/traefik/traefik.log:/logs/traefik.log - /volume1/docker/traefik/acme/acme.json:/acme.json environment: - TZ=Europe/London labels: - traefik.enable=true - traefik.http.routers.traefik.rule=Host(`$TRAEFIK_DASHBOARD_HOST`) && (PathPrefix(`/api`) || PathPrefix(`/dashboard`)) - traefik.http.routers.traefik.service=api@internal - traefik.http.routers.traefik.entrypoints=traefikMy traefik.yml is also nice and basic at this point:
global: sendAnonymousUsage: false entryPoints: web: address: ":80" traefik: address: "8080" api: dashboard: true insecure: true providers: docker: endpoint: "unix:///var/run/docker.sock" watch: true exposedByDefault: false log: filePath: traefik.log level: DEBUG accessLog: filePath: access.log bufferingSize: 100Any ideas what’s going wrong? I’m unclear on why the domain is still routing to Cloudflare.
It sounds like your client isn’t using PiHole for DNS, do you see the DNS lookup come through the pihole logs?
Actually, no I don’t see anything coming through.
So the IP address of my router is 192.168.1.1, IP of my NAS is 192.168.1.116.
Checked the DNS on my Mac and it’s 192.168.1.1. Checked the DNS on my NAS and it’s 192.168.1.1. I changed the DNS in my router to 192.168.1.116.
Have I missed a step somewhere?
It sounds like you haven’t updated your routers DHCP server to hand out the Pihole IP to clients. You can manually set the DNS server to the Pihole IP on your Mac for testing too.
The flow should be: Clients > Pihole > Router > Public DNS
Or you can skip the router: Clients > Pihole > Public DNS
I think the pihole container needs to be on the host network or macvlan?