Troubleshooting Common SimpleServer:WWW Issues

Troubleshooting Common SimpleServer:WWW Issues

1. Server won’t start

• Check logs: Inspect server logs (default: /var/log/simpleserver/www.log).
• Port conflict: Ensure configured port (default 8080) isn’t in use: ss -ltnp | grep 8080.
• Config errors: Validate config file syntax (JSON/YAML) and required fields.
• Permissions: Verify user running service can read config and bind to port (use sudo for <1024).

2. 403 Forbidden or permission errors

• Document root permissions: Ensure web root and files are readable by server user (e.g., chown -R simpleserver:www /srv/simple_www; chmod -R 750).
• Index file present: Add index.html/index.php or enable directory listing in config.
• Access rules: Check IP allow/deny and auth settings in config.

3. 404 Not Found for valid files

• Path mapping: Confirm URL-to-filesystem mapping and rewrite rules.
• Case sensitivity: Confirm filename case matches request on Linux.
• MIME/type handling: Ensure server serves the file type (add mapping for uncommon extensions).

4. Slow responses or high latency

• Resource limits: Monitor CPU/memory (top, htop). Increase worker threads or cache settings in config.
• Keep-alive and timeouts: Tune keepalive, request timeout, and worker timeouts.
• Static file delivery: Enable gzip/deflate and set caching headers; offload heavy assets to a CDN.
• DNS or network: Test with curl and traceroute; check reverse DNS and upstream latency.

5. TLS/HTTPS problems

• Certificate validity: Verify cert files and chain (openssl s_client -connect host:443).
• Protocol/cipher mismatch: Ensure server supports modern TLS versions and ciphers.
• Redirect loops: Check HTTP→HTTPS redirect rules and proxy headers (X-Forwarded-Proto).

6. ⁄₅₀₄ gateway errors behind a proxy

• Upstream health: Confirm backend application is running and reachable.
• Timeouts: Increase proxy read/forward timeouts if backend is slow.
• Header forwarding: Ensure correct Host and X-Forwarded-headers are set.

7. File uploads failing

• Size limits: Increase max upload size and request body limits in config.
• Temp storage: Ensure temporary upload directory has space and write permissions.
• Timeouts: Raise request timeout for large uploads.

8. Authentication issues

• Credential store: Verify user database or auth provider connectivity.
• Cookie/session: Check session storage (disk/redis) availability and cookie settings (secure, sameSite).
• Clock skew: Ensure server time is correct for token expiry checks.

9. Log rotation and disk full

• Rotate logs: Configure logrotate for server logs and enable compression.
• Monitoring: Add disk usage alerts; clear old logs and temporary files.

10. Debugging tips & commands

• Use: systemctl status simpleserver, journalctl -u simpleserver -f, curl -vk http://host:port/path, ss -ltnp, top/htop, tail -F /var/log/simpleserver/www.log.
• Reproduce issues with minimal config, enable debug logging briefly, and test locally before applying to production.

If you want, I can produce a checklist tailored to your SimpleServer:WWW config or generate specific commands for your OS.