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Technical help with Linux servers, websites and internet services
I diagnose and organize issues with servers, DNS, business email, SSL certificates, Docker, backups and monitoring.
If something is broken, unstable or needs a cleaner setup, describe the problem. I will suggest a sensible first step.
How I can help
- A server is unstable, services stop unexpectedly or logs show errors.
- Business email lands in spam or messages do not reach recipients.
- DNS, domain, SSL or HTTPS needs diagnosis or proper configuration.
- A website or application needs to run in Docker or behind a reverse proxy.
- Backups, monitoring, alerts or basic infrastructure order are missing.
Main specializations
Linux and servers — troubleshooting outages, logs, services, SSH and firewalls, and cleaning up configurations.
Examples of diagnostics and deployments
Email certificate error
Problem: Thunderbird did not trust the IMAPS server certificate.
Result: a complete Dovecot TLS chain and successful connection verification.
Read the diagnostic notesWeb container migration
Problem: Traefik could not reach the service after an nginx image change.
Result: the port was corrected and the deployment verified in integration.
Read the migration notesFailover test
Problem: verification of the procedure for switching a website to a standby VPS.
Result: a successful test and an apparent issue traced to the DNS cache.
Read the test notesHow cooperation works
- You describe the issue through the contact form.
- I check whether I can help and suggest a sensible first step.
- We agree on the scope, cost and way of working.
- After the work is done, you get a clear note on what changed and why.
Technical knowledge
You will also find blog posts and tutorials here. They show how I approach technical topics: practically, step by step and with focus on understanding how the system works.