In the past two weeks I set up a new VPS, and I run a small experiment. I share the results for those who are curious.
Consider that this is a backup server only, meaning that there is no outgoing traffic unless a backup is actually to be recovered, or as we will see, because of sshd.
I initially left the standard “port 22 open to the world” for 4-5 days, I then moved sshd to a different port (still open to the whole world), and finally I closed everything and turned on tailscale. You find a visualization of the resulting egress traffic in the image. Different colors are different areas of the world. Ignore the orange spikes which were my own ssh connections to set up stuff.
Main points:
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there were about 10 Mb of egress per day due just to sshd answering to scanners. Not to mention the cluttering of access logs.
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moving to a non standard port is reasonably sufficient to avoid traffic and log cluttering even without IP restrictions
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Tailscale causes a bit of traffic, negligible of course, but continuous.
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Acronyms, initialisms, abbreviations, contractions, and other phrases which expand to something larger, that I’ve seen in this thread:
Fewer Letters More Letters DNS Domain Name Service/System HTTP Hypertext Transfer Protocol, the Web IP Internet Protocol SSH Secure Shell for remote terminal access UDP User Datagram Protocol, for real-time communications VPN Virtual Private Network VPS Virtual Private Server (opposed to shared hosting) nginx Popular HTTP server
7 acronyms in this thread; the most compressed thread commented on today has 8 acronyms.
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Good bot!
Great bot
Public key auth, and fail2ban on an extremely strict mode with scaling bantime works well enough for me to leave 22 open.
Fail2ban will ban people for even checking if the port is open.
Yeah fail2ban has worked great for me
Or, you know, just use key auth only and fail2ban. Putting sshd behind another port only buys you a little time.
I’ve noticed that a lot of the scans these days almost always switch IPs after 2-3 attempts, making IP blocking a lot more difficult.
Yeah but the majority of bots out there are going after easy prey. Honestly, if you use public key authentication with ssh you should be fine, even if it is on port 22. But it does of course clog up access logs.
The majority of bots out there are stopped by just using a hard to guess password. It’s not them that you should be worried about.
You really shouldn’t have something kike SSHD open to the world, that’s just an unnecessary atrack surface. Instead, run a VPN on the server (or even one for a network if you have several servers on one subnet), connect to that then ssh to your server. The advantage is that a well setup VPN simply won’t respond to an invalid connection, and to an attacker, looks just like the firewall dropping the packet. Wireguard is good for this, and easy to configure. OpenVPN is pretty solid too.
You say this and are downvoted.
While we are coming off the tail of Def Con where there where a plethora or small talks and live examples of taking advantage and abusing just this.
Just trying to parse your comment, I assume your first “this” and second “this” are referring to different things, right?
I don’t understand your comment, what you are saying. Could you elaborate a bit, please? I’m interested why it’s a bad idea what previous comment suggested.
Of course I can dig into DefCon videos and probably would do if needed, but perhaps you know what exactly the issue is
The first this means the comment he answered to and the second one means ssh being used as an attack surface, being described in defCon talks
I’ll take that tiny amount of traffic telling scanners there’s no password auth over having to remember port settings for ssh, scp and rsync any day.
My configs remember stuff for me.
vim ~/.ssh/configdeleted by creator
Just do it properly and configure sshd securely. When you have a machine exposed to the internet, you should expect it to be attacked. If you really want to give the finger to bots, run endlessh on port 22 and keep sshd on a non-standard port. Stay safe.
endlessh
Lmao thanks for this
I opened a raw text channel on the Telnet port for a personal game engine project and someone tried to enable commands and do some shady stuff. Unfortunately for them, that’s not a valid chess move.
I get what you say, and you’re definitely not wrong to do it. But as I see it, you only saved ~80Kib of ingress and a few lines of logs in the end. From my monitoring I get ~5000 failed auth per day, which account for less than 1Mbps average bandwidth for the day.
It’s not like it’s consuming my 1Gbps bandwidth or threatening me as I enforce ssh key login. I like to keep things simple, and ssh on port 22 over internet makes it easy to access my boxes from anywhere.
Whys this a problem disable password auth and wish em good luck lol.
I don’t get tailscale? In-kernel Wireguard is easy to setup. What does it add to this?
Tailscale is a nice way to set up a private network between your machines. It’s perfectly fine.
deleted by creator
Tailscale is built on top of wireguard. It just manages all the hassle of configuring it. In my case it was a godsend as I have like 10 devices all roaming and scattered across multiple countries. It’d be a massive headache to type down IPs and whatnot every time one changes networks.
I’d favour own VPN instead of relying on an additional third party
Right? PiVPN is easy AF and uses WireGuard. No reason not to set up something yourself if you’re already selfhosting.
Please ELI5: How does this solution work? You tunnel yourself in your home network with a VPN on your PI? How is that safer, isn’t there still a port open?
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What’s the Enthusiasm About?
Hello there! Are you familiar with Go High Level? If not, let’s break it down. Imagine managing multiple apps for marketing. Sounds busy. That’s where Go High Level comes in. It’s like that friend who has a solution for everything. Whether you are working on creating an outstanding sales funnel or sending out an email campaign, this platform has your back. The best part? They let you test drive everything with a 14-day free trial. It’s like trying out a new car but for your business. And if you ever need assistance, their support team is just a click away. Pretty exciting, huh? -
So, How Much Does It Cost?
Alright, let’s talk about the financial side. Go High Level offers 3 main plans. The Agency Starter Plan is perfect if you’re just starting or have a small business. It’s loaded with all the essential tools, and it’s quite cost-effective. But if you’re looking to scale up, the Agency Unlimited Plan is your best choice. It’s like the VIP pass at a concert, giving you access to everything without any limitations. Not sure about committing? Remember that 14-day free trial I mentioned? It’s a great way to give it a try without any obligations. Lastly, they offer a Pro plan that includes “SaaS mode,” where you can white label the product under your brand. Fantastic! -
Why Everyone’s Raving About It:
In a world full of sophisticated digital tools, Go High Level is like that all-in-one Swiss Army knife. There’s no need to switch between apps because it has everything under one roof. Whether you’re a newcomer or an experienced marketer, it’s super user-friendly. It’s not just about launching impressive campaigns; they ensure you understand their performance with top-notch analytics. There’s even a white-label feature for marketing agencies, so you can add your brand and impress your clients.
Here is a link to their 14-day free trial:
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