Yeah, I like his argument about profiles maybe going to be able “e.g., to eliminate most range errors relatively soon.”

Well maybe C++ could be considered safe “relatively soon” then but not right now.

Like he says: “Of the billions of lines of C++, few completely follow modern guidelines, and peoples’ notions of which aspects of safety are important differ.”

That said, I don’t really consider C++ to be inherently unsafe, there’s a lot that goes into secure programming in any language. Just because you can’t write to an array out of bounds in python doesn’t mean your code is magically immune to vulnerabilities and just because you can in C, it doesn’t mean your code is magically vulnerable to RCE from some buffer overflow.

I also don’t really trust myself to write perfectly safe production C++ though. I feel like it’s still too easy to feel like you know exactly what you’re doing and accidentally miss something small (hence the many thousands of memory safety CVEs in professional software).

They ruined Linux!

That’s pretty cool!

Although that’s probably what op is actually asking for, I don’t think it’s a modem. It’s a router with an access point.

It does have SFP for a fibre connection and pcie and USB for you to potentially add a modem or whatever else you want.

I’m guessing OP is just looking for a wifi router? Otherwise we’d need to know what kind of modem they’re looking for, like Cellular? VDSL? HFC? Satellite? It depends on the internet connection. Different parts of the world need very different kit.

Totally agree on all points!

My only issue was with the assertion that OP could comfortably do away with the certs/https. They said they were already using certs in the post and I wanted to dispel the idea that they arguably might not need them anymore in favour of just using headscale as though one is a replacement for the other.

Tailscale isn’t an exposed service. Headscale is

Absolutely! And it’s a great system that I thoroughly recommend. The attack surface is very small but not non-existent. There have been RCE using things like DNS rebinding(CVE-2022-41924) etc. in the past and, although I’m not suggesting that it’s in any way vulnerable to that kind of thing now, or that it even affected most users we don’t know what will happen in future. Trusting a single point of failure with no defence in depth is not ideal.

it’s more work and may not always be worth the effort

I don’t really buy this. Certs have been free and easy to deploy for a long time now. It’s not much more effort than setting up whatever service you want to run as well as head/tailscale, and whatever other fun services you’re running. Especially when stuff like caddy exists.

I recommended SmallStep+Caddy.

Yes! Do this if you don’t want to get your certs signed for some reason. I’m only advocating against not using certs at all.

Are you suggesting that these attack techniques are effective against zero trust tunnels

No I’m talking about defence in depth. If Tailscale is compromised (or totally bypassed by someone war driving your WiFi or something) then all those services are free to be impersonated by a threat actor pivoting into the local network after an initial compromise. Don’t assume that something is perfectly safe just because it’s airgapped, let alone available via tunnel.

I feel like it’s a bit like leaving all your doors unlocked because there’s a big padlock on the fence. If someone has a way to jump the fence or break the lock you don’t want them to have free reign after that point.

there’s an argument that HTTPS isn’t really required…

Talescale is awesome but you gotta remember that Talescale itself is one of those services (Yikes). Like all applications it’s potentially susceptible to vulnerabilities and exploits so don’t fall into the trap of thinking that anything in your private network is safe because it’s only available through the VPN. “Defence in depth” is a thing and you have nothing to lose from treating your services as though they were public and having multiple layers of security.

The other thing to keep in mind is that HTTPS is not just about encryption/confidentiality but also about authenticity/integrity/non-repudiation. A cert tells you that you are actually connecting to the service that you think you are and it’s not being impersonated by a man in the middle/DNS hijack/ARP poison, etc.

If you’re going to the effort of hosting your own services anyway, might as well go to the effort of securing them too.

Yeah, that’s what they’re for. Having multiple accounts separated and not interfering with each other. So you can have eg. three different tabs of Gmail open or office or whatever in the same window with different accounts logged in. Each tab with a different colour. Great for separating work stuff from personal stuff or isolating bank logins etc.

Sounds like the same thing as you’re describing in chrome (though I haven’t tried the chrome implementation)

Firefox account containers are very clean and easy for this. The tabs get colour coded based on which account is logged in and you can configure certain sites to always open in certain containers.