The site is not accessible to everyone: check IPv4 and IPv6 separately via curl
Two comparable requests help reveal differences in network paths, HTTP responses, and HTTPS errors without changing DNS or server settings.
Михаил
4 minViews9
COMMUNITY AUTHOR
Михаил
One point for every published article.
Stories by this author
Which SSH Settings Apply to a Specific User
Read the effective OpenSSH configuration considering Match directives and login parameters without modifying files or restarting the service.
Михаил
5 minViews4
Database Replica Repeated the Deletion: Where to Find the Pre-Error State
Using MySQL as an example, we examine the boundary between a second working database and saved history, as well as the recovery window for a lagging replica.
Михаил
5 minViews3
VPS Snapshots and Store Consistency: What Might Not Match
Why valid database and file copies can represent different states, and which snapshot boundaries to verify before restoration.
Михаил
4 minViews5
DNS Record Created, but NXDOMAIN Persists: Checking Negative Cache
Compare the authoritative response with the resolver's response using dig, read the SOA record, and calculate the negative cache duration without modifying DNS.
Михаил
5 minViews3
The process terminated due to memory, although free RAM remained on the VPS
Free server memory does not rule out limits on a specific process group. We examine local OOM, the meaning of cgroup v2 counters, and the data needed before changing your tariff.
Михаил
5 minViews3
Website Backup: Who Can Download Your Archive?
A closed file list does not mean a closed archive. We examine access boundaries for backups, role verification, and temporary link conditions.
Михаил
7 minViews4