I'm not sure you read the OP's comment in full. They are talking about inbound traffic from the Internet. It's certainly a lot more common a case to self-host an MX than running an open DNS resolver or authorative name server.
You may be surprised to learn that there are many types of botnets out there, and many use DNS queries for the C&C.
Although the GP wrote "53/tcp" that is a weird situation, because most (not all) DNS is over UDP.
One day I suddenly found my DNS resolver logs were very active with veritable gibberish. And it seems that my router had been pwned and joined some sort of nefarious botnet.
I only found this out because I was using NextDNS at the time, and my router's own resolver was pointed there, and NextDNS was keeping meticulous, detailed logs of every query.
So I nipped it in the bud, by determining which device it was, by ruling out other devices, and by replacing the infected demon router with a safe one.
But yeah, if your 53/udp or 25/tcp is open, you can pretty much expect to join a botnet of the DNS or SMTP-spam varieties.
That's none of the business of my ISP to care about. If a botnet abuses my connection to send excessive traffic, that's going to be limited by the bandwidth limit I'm paying for.
Restricting ports also doesn't mitigate it, as a port scanner can easily find out I'm running this or that vulnerable server software on a non-standard port.
It's none of the ISP's business to restrict the ports I should be using.
My opinion after self-hosting for over a decade is that, yes, it's easy. See my comment further inside the thread for my take on whether or not it's advisable.
OK: it's easy, unless you're the "atechnical" sort.
Is it recommended? I'm torn here, because the big beasts are systematically spam/junk-classifying and even rejecting e-mail sent from independent MXes despite ticking the right checkboxes (FQrDNS, SPF, DKIM, DMARC) and having a clean IP-address in a tidy network.
You're missing the complexity of making the guest inform the host that it has fully freed this and that slab of memory and that the host may reclaim it until further notice. It's a bit more complicated than the other way around, where the guest believes it has e.g. 4 GiB of RAM available but the host doesn't allocate all of it for the guest until it tries to read/write there. A virtual machine is something entirely else than a containerized piece of software.
Intel never made EUV machines, never claimed to make EUV machines, never aspired to make EUV machines, and have run multiple marketing campaigns bragging about the ASML EUV machines they purchased.
I've met neurodivergent people who couldn't even stay on track long enough to prepare a regular dinner. Strong "neurogenetic executive failure" is a common trait. It's nowhere near as black and white as the article wants to make it out to be.
Totally. A prominent feature of ADHD is a staggering lack of awareness of the ADHD, for example. Very little progress can be made when you externalize blame for a condition you aren't aware of and don't understand. Speaking from experience.
My worst features as a software developer have always been byproducts of neurodivergence and that lack of awareness.
There are also good features and I know I'm useful to have around for system design and development. I just wouldn't say I'm better. I'm complimentary to others, not better. That's why we build systems as teams.
While I feel that this is a little unfair on people with ADHD, it's definitely very true that it's a disorder heavily characterized by an inability to practice mindfulness. As such, it can be nearly impossible, especially from the inside, and most especially in the moment, to determine when Something I Did Wrong was because of ADHD, or because I've been too cavalier about things like planning and note-taking.
It could be unfair; I hope that it isn't. It certainly reflects my personal experience and my perception of friends, family, and peers who live with ADHD. It's not meant to be insulting or critical at all.
Perhaps it's true of all people though, and it's revealed much more so when your atypical traits go against the grain. I've wondered about this quite a bit over the years.
In my experience there are either acutely unaware or too aware which then leads to insecurity and self-sabotaging behavior.
Speaking from my own neurodivergent experience: I tend to be a bit slower and get distracted easily, but when circumstances are optimal (silent office, clear expectations, etc) I can function on about the same level as my neurotypical peers.
While I don't 'blame' neurotypicals, I do recognize that most office environments are not that accessible for me and other neurodivergent people.
reply