Dynamic DNS vs Dedicated VPN IP
from kakes@sh.itjust.works to selfhosted@lemmy.world on 05 May 01:20
https://sh.itjust.works/post/18814471
from kakes@sh.itjust.works to selfhosted@lemmy.world on 05 May 01:20
https://sh.itjust.works/post/18814471
Hi everyone!
I’m looking into self-hosting, and I currently have dynamic DNS set up to point to my home IP.
My question: is it worth getting a dedicated IP through a VPN?
I’m pretty technically savvy, but when it comes to networking I lack practical experience. My thought is that pointing my domain to a dedicated IP and routing that traffic to my home IP would be safer - especially if I only allow traffic on certain ports from that IP. Just curious if that idea holds up in practice, or if it’s not worth the effort.
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As long as whatever firewall rules you’re using is capable of resolving FQDNs then I don’t see an advantage of doing this. Maybe in the off chance that your IP changes, someone else gets the old IP and exploits it before the DDNS setup has a chance to update. I think that’s really unlikely.
Edit: just to add to this, I do think static IPs are preferable to DDNS, just because it’s easier, but they also typically cost money.
Why do firewall rules need to resolve FQDNs?
To resolve whatever hostname you’ve setup for ddns
Sorry, but I still don’t understand, what’s the need for that?
Because you’re not going to setup any rules pointed to a dynamic public IP address. Otherwise you’re going to be finding a way to change the rule every time the ip changes.
The ddns automatically updates an A record with your public IP address any time it changes, so yeah the rules would use the fqdn for that A record.
What’s the need of the public IP in the firewall rules?
If OP needs a firewall rule to do any number of things that a firewall does.
I’m curious to know in which case is useful to know the public IP in a firewall rule because I’ve never used it.
An access rule for instance. To say to allow all traffic or specific types of traffic from a public IP address. This could be if you wanted to allow access to some media server from your friends house or something.
To allow access from a friend you need his public IP, not yours.
No fucking shit? In that scenario your friend could use DDNS and you point your access rule to his FQDN to allow access.
Did you really ask me a billion fucking “why” questions just to come back and fucking what prove me wrong? Is this a good use of your time? I literally thought you were a noobie looking to understand.
Fuck off.
Dude, just chill! I didn’t think that your answer made sense in the first place and that’s why I’ve asked why you wrote that sentence. I’m not the one that reply to a comment saying “You’re wrong!”, unless I’m more than sure about what I’m talking, otherwise, and in this case I wasn’t sure and I wanted to know your point. I’m here to give my point of view and also to LEARN from others and this is why I kept asking you what was the need of resolving a DNS in a firewall rule, so that maybe I could start using those rules too. On the other side, if you understood that your answer didn’t make sense, you simply could have just said it and not waste mine and your time. I think that we ALL are here to share idea and knowledge and that NO ONE is perfect, me in the first place!
If you really think someone is wrong don’t ask them “why, why, why” incessantly like a toddler, grow a pair of balls and just speak your mind.
And in this case I meant “your IP” as in, the grand scheme of things “an IP address that you own”, a VPS for instance, not necessarily the destination. Obviously you wouldn’t need to tell a firewall what its own public IP is. Have I clarified my thought to your standards?
You’ve clarified your thought to a normal standard, as you didn’t previously. Learn to say “I was wrong” when you are wrong!
Edit: could I have said in the first place that I thought that you were wrong? Probably yes and I’ll keep that in mind.
I would’ve if I was wrong
A fixed IP does make things easier at first, but I fail to see the value on that for personal use. Nothing a reverse proxy and DDNS can’t replace.
I purchased a domain, use dynamic DNS for it, and point my sub domains to an NGINX proxy server that handles where each points to.
Nothing has access to anything in my network from the internet (all ports are closed on my PFSense), other than Wireguard, and I just VPN into my network when I’m not home.
It was scary when I started, but figured it out in a couple of days. Take into consideration that I’m not even mildly smart, so it should be fairly easy for anyone.
Get into forums, ask around, watch tutorials, you’ll be up and running in no time.
Good luck.
Thanks for the reply!
So the NGINX server hosted outside your network, then? And then reverse-proxy that into your home server?
Honestly, I feel like NGINX is a bit overkill for my situation, since I’m not expecting to have a lot of traffic. I could be wrong, though.
No, the nginx runs inside your network. It’s the “entry point” to it and it proxies all requests to your respective services.
Ahh okay, thanks for the clarification. Honestly I should use NGINX just for the sake of learning it, if nothing else.
@kakes@sh.itjust.works It would be better to have the server on a separated VLAN
Yeah, thats definitely something I need to look into setting up.
Their setup sounds similar to mine. But no, only a single service is exposed to the internet: wireguard.
The idea is that you can have any number of servers running on your lan, etc… but in order to access them remotely you first need to VPN into your home network. This way the only thing you need to worry about security wise is wireguard. If there’s a security hole / vulnerability in one of the services you’re running on your network or in nginx, etc… attackers would still need to get past wireguard first before they could access your network.
But here is exactly what I’ve done:
Now I can just turn on my phone’s VPN whenever I need to access any one of the services that would normally only be accessible from home.
P.s. there’s additional steps I did to ensure that the masquerade of the VPN was disabled, that all VPN clients use my pihole, and that I can still get decent internet speeds while on the VPN. But that’s slightly beyond the original ask here.
Wouldn’t this require any user to connect to the VPN though? I’m looking for something more publicly accessible - say like a website.
Yes it would. In my case though I know all of the users that should have remote access snd I’m more concerned about unauthorized access than ease of use.
If I wanted to host a website for the general public to use though, I’d buy a VPS and host it there. Then use SSH with private key authentication for remote management. This way, again, if someone hacks that server they can’t get access to my home lan.
No, it’s inside the network. Once I’m inside my network via the VPN, the proxy server routes to the service I want based on the subdomain instead of using the IP and port as the address.
This can also be useful if, instead of going the VPN route, and you choose to go the CDN tunnel (for example, Cloudflare) way. I actually started with a tunnel via Cloudflare, but after some digging, I don’t trust them anymore. Having a tunnel allows you to close all ports coming into your network, but at the expense of having to trust the tunnel provider, and I don’t trust many companies out there.
Nginx isn’t for security it’s to allow hostname-based proxying so that your single IP address can serve multiple backend services.
Thanks, I’m only very vaguely familiar with NGINX, so I appreciate the clarification.
To provide a bit more detail then - you would setup your proxy with DNS entries “foo.example.com” as well as “bar.example.com” and whatever other sub-domains you want pointing to it. So your single IP address has multiple domain names.
Then your web browser connects to the proxy and makes a request to that server that looks like this:
nginx (or apache, or other reverse proxies) will then know that the request is specifically for “foo.example.com” even though they all point to the same computer. It then forwards the request to whatever you want on your own network and acts as a go-between between the browser and your service. This is often called something like host-based routing or virtual-hosts.
In this scenario the proxy is also the SSL endpoint and would be configured with HTTPS and a certificate that verifies that it is the source for foo.example.com, bar.example.com, etc.
Ahh okay, interesting. I’ll have to give this a try, then.
Really only if you’re running your own email server. Otherwise as far as I know dynamic DNS fills the need.
You aren’t in any more risk either way.
Sounds like maybe you want to look into pfsense to do traffic filtering. Highly recommend.
I messed with pfsense a bit at my old job, but never really thought to use it in my home network - might just give that a shot, thanks!
Because you don’t need it. OPNsense and pfSense may make sense in some cases however you’re running a small network and you most likely don’t require those. OpenWRT will provide you with a much cleaner open-source experience and also allow for all the customization you would like. Another great advantage of OpenWRT you’ve the ability to install 3rd party stuff in your router, you may even use qemu to virtualize stuff like your Pi-Hole on it or simply run docker containers.
Safer in terms of what?
If you can’t justify it, then no, save your money.
Just in terms of broadcasting my home IP directly vs having a middleman, essentially.
You’re not “broadcasting” anything. You’re running a server.
Your browser is the thing sending your ip to every site you visit. And beyond simple geolocation data it’s not that useful to anybody.
Sorry, yeah, “broadcasting” was a bad word choice. What I meant was that if I port-forward, it exposes that socket to potential bad actors searching for exposed services.
Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I’ve seen in this thread:
[Thread #737 for this sub, first seen 5th May 2024, 05:35] [FAQ] [Full list] [Contact] [Source code]
First I’d ask if you need to open ports at all - if this is only for your family’s use then Tailscale or one of its alternatives can accomplish the same goal without opening ports in your firewall or worrying about security flaws in your hosted services.
If it’s for public use, maybe consider cloudflare tunnel?
True, these do sound like the best solutions honestly. I wanted to avoid something like Tailscale, since it just becomes another point for me to support/troubleshoot on the user end, but maybe I should reconsider. It’s a tradeoff, but it would also simplify a lot on my end.
You can do that or you can use a reverse proxy to expose your services without opening ports for every service. With a reverse proxy you would point port 80 and 443 to the reverse proxy once traffic hits your router/firewall. In the reverse proxy you would configure hostnames that point to the local service IP/ports. Reverse proxy servers like nginx proxy manager then allow you to setup https certificates for every service you expose. They also allow you to disable access to them through a single interface.
I do this and have setup some blocklists on the opnsense firewall. Specifically you could setup the spamhaus blocklists to drop any traffic that originates from those ips. You can also use the Emerging Threats Blocklist. It has spamhaus and a few more integrated from dshield ect. These can be made into simple firewall rules.
If you want to block entire country ips you can setup the GeoIP blocklist in opnsense. This requires a maxmind account but allows you to pick and choose countries.
You can also setup the suricatta ips in opnsense to block detected traffic from daily updates lists. It’s a bit more resource intensive from regular firewall rules but also far more advanced at detecting threats.
I use both firewall lists and ips scanning both the wan and lan in promiscuous mode. This heavily defends your network in ways that most modern networks can’t even take advantage.
You want even more security you can setup unbound with DNS over TLS. You could even setup openvpn and route all your internal traffic through that to a VPN provider. Personally I prefer having individual systems connect to a VPN service.
Anyway all this to say no you don’t need a VPN static IP. You may prefer instead a domain name you can point to your systems. If you’re worried about security here identify providers that allow crypto and don’t care about identity. This is true for VPN providers as well.
Thank you for such an in-depth reply!
There’s a lot to take in here, but it sounds like I’ve got some work to do - not necessarily a bad thing. It’s honestly about time I took my network more seriously and set up some proper routing / firewalls.
VPN providers usually do not offer port forwarding, so the dedicated IP doesn’t help you. I discussed that in length with a support guy from nordvpn. The dedicated IP is only meant for outgoing connections, so your IP doesn’t jump to crazy, which would cause problems,e.g., with bank logins.