A Reddit thread perfectly sums up the absolute chaos of self-hosting. Spoiler alert: It's always Permissions, Networking, or the black magic known as DNS.

You know the drill. It's Friday night, you could be out having a beer, but instead, you decided to spin up a VPS or drag a dusty server into your living room to build a homelab. You think you're going to build an elegant, self-hosted utopia. Fast forward to 3 AM, you're chugging Red Bull and crying over a terminal window.
Recently on r/homelab, a post hit right in the feels of thousands of devs. A simple meme summarized the entire lifecycle of every self-hosting setup ever. Forget complex architecture; the absolute doom of any homelab boils down to three final bosses:
chmod 777 and invite the entire internet into your system, or lock it down so hard the application itself can't read its own config files.The post easily grabbed almost 2k upvotes, acting as a group therapy session for traumatized sysadmins and devs.
The "You Forgot Something" Squad: User KAZAK0V bluntly stated: "Every self-hosting? Lies. Every problem in the wild connected to these trio." Another dev jumped in with the missing pieces of the puzzle: "Fair swap in SSL certs and storage quotas and it covers most of the rest." Ah yes, the expired Let's Encrypt cert and the silently full 100% disk space—the silent killers of uptime.
The Network Major's Confession: Someone innocently asked, "Why is DNS separate from networking?" The response from a networking specialist was painfully real:
"I have a degree specialised in networking, and DNS... That thing still scares me." If the guys with the degrees are terrified, what hope do the rest of us have?
The Haiku of Despair: Of course, no thread about server issues is complete without the most famous IT poem in history making an appearance:
It's not DNS It can't be DNS It was DNS
Look, self-hosting is an amazing way to learn. It builds character (and by character, I mean a high tolerance for frustration). Hitting a brick wall with network configs is how you actually learn how the internet works under the hood.
But if there's one golden rule to take away from this collective trauma: whenever an app goes down, whenever an API fails, whenever your database refuses to connect... before you rewrite your code, before you nuke the container, just ping the damn domain. It's always DNS.