Server Security & DDoS Protection

Q: Is my SSL certificate secure? How do I check TLS 1.2+?

Check: ssl-test.ssllabs.com (A+ ideal). Important: use TLS 1.2/1.3, disable TLS 1.0/1.1, strong ciphers. Nginx/Apache: review TLS config. Let's Encrypt free, automated with certbot.

Q: How do I tell if my server got hacked?

Signs: 1. unknown processes (ps aux), 2. unexpected cron jobs, 3. new users (id), 4. RAM/CPU unexpectedly full, 5. open ports (netstat), 6. logs in /var/log edited/deleted. Solution: restore backup, set up from scratch.

Q: How to generate SSH keys correctly – what do I do?

Locally: ssh-keygen -t rsa -b 4096. Store private key securely (~/.ssh/id_rsa, chmod 600), public key on server (/root/.ssh/authorized_keys, chmod 644). Then disable SSH password login (PermitRootLogin no, PasswordAuthentication no).

Q: What is a brute-force attack and how do I protect myself?

Attacker tries millions of password combinations. Protection: 1. SSH keys instead of password, 2. Fail2ban (lockout after 5 attempts), 3. rate limiting (iptables), 4. SSH on non-standard port (e.g., 2222). Combination works best.

Q: How often should I update my system?

Security updates: daily with unattended-upgrades. Major releases: monthly (test first). Kernel updates: after 1-2 weeks (reboot needed). Critical zero-day exploits: immediately. Better: too often than too seldom.

Q: Server firewall Germany – Datenschutz & Compliance?

NexoraHost UFW + Fail2ban Setup: DSGVO-konform. Keine USA-Überwachung. Logs: auf deutschen Servern gespeichert. Audit: auf Anfrage dokumentiert.

Q: SSL certificate free in Österreich – Sicherheit?

Let's Encrypt kostenlos auch in AT. NexoraHost automatisiert Renewal. HTTPS: mandatory für alle. German Trusted CA auch verfügbar (optional).

Quick answer: Baseline VPS security: harden SSH, UFW, updates, Fail2ban/CrowdSec, HTTPS – then least privilege for apps.

VPS & root servers: Order VPS in Germany · panel.nexorahost.de · nexorahost.com (Maincubes FRA01 Frankfurt · Ryzen · NVMe · GDPR)

Frequently asked questions (FAQ)

How do I secure my root server from hacker attacks?

1. SSH keys instead of passwords, disable root login, 2. UFW firewall + Fail2ban, 3. regular updates (unattended-upgrades), 4. minimize ports, 5. fail2ban rules for services, 6. regularly check logs. Result: 99% protection against standard attacks.

What is Fail2ban and how do I set it up?

Fail2ban monitors log files and automatically blocks IPs after X failed login attempts. Installation: apt install fail2ban. Then: edit /etc/fail2ban/jail.local, adjust bantime/maxretry, systemctl restart fail2ban.

Do I need DDoS protection for my game server?

For smaller servers (<100 players): built-in firewall sufficient. For medium size+: consider Cloudflare or Netscaler. Better: start with new provider without public IP (proxy). NexoraHost offers optional DDoS protection modules.

Is my SSL certificate secure? How do I check TLS 1.2+?

Check: ssl-test.ssllabs.com (A+ ideal). Important: use TLS 1.2/1.3, disable TLS 1.0/1.1, strong ciphers. Nginx/Apache: review TLS config. Let's Encrypt free, automated with certbot.

How do I tell if my server got hacked?

Signs: 1. unknown processes (ps aux), 2. unexpected cron jobs, 3. new users (id), 4. RAM/CPU unexpectedly full, 5. open ports (netstat), 6. logs in /var/log edited/deleted. Solution: restore backup, set up from scratch.

How to generate SSH keys correctly – what do I do?

Locally: ssh-keygen -t rsa -b 4096. Store private key securely (~/.ssh/id_rsa, chmod 600), public key on server (/root/.ssh/authorized_keys, chmod 644). Then disable SSH password login (PermitRootLogin no, PasswordAuthentication no).

What is a brute-force attack and how do I protect myself?

Attacker tries millions of password combinations. Protection: 1. SSH keys instead of password, 2. Fail2ban (lockout after 5 attempts), 3. rate limiting (iptables), 4. SSH on non-standard port (e.g., 2222). Combination works best.

How often should I update my system?

Security updates: daily with unattended-upgrades. Major releases: monthly (test first). Kernel updates: after 1-2 weeks (reboot needed). Critical zero-day exploits: immediately. Better: too often than too seldom.

Server firewall Germany – Datenschutz & Compliance?

NexoraHost UFW + Fail2ban Setup: DSGVO-konform. Keine USA-Überwachung. Logs: auf deutschen Servern gespeichert. Audit: auf Anfrage dokumentiert.

SSL certificate free in Österreich – Sicherheit?

Let's Encrypt kostenlos auch in AT. NexoraHost automatisiert Renewal. HTTPS: mandatory für alle. German Trusted CA auch verfügbar (optional).

GDPR compliance für Server in Schweiz – was beachten?

Schweizer Datenschutz ähnlich DSGVO aber eigenes Gesetz. NexoraHost: erfüllt beide. Encryption at Rest: optional für CH Customers.

Penetration testing Germany – sicher auf eigenem Server?

Pen-Testing erlaubt auf eigenem Server. NexoraHost: unterstützt das, brauchte nur Notiz. Professional Services: via Partner verfügbar.

Data residency – Daten müssen in Deutschland bleiben?

NexoraHost DE: alle Daten in Deutschland. Keine Replication zu USA. Audit-Reports: auf Anfrage. Compliance: DSGVO, NIS2, TKG certified.

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