Kosifuchs
Practical security for small businesses & non-profits

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VPN – Sicher unterwegs auf der Datenautobahn

VPN – Safe on the data highway

Practical security book about VPNs: protocols (OpenVPN, WireGuard, IPsec/IKEv2), common attacks, indicators, hardening and realistic countermeasures — nerd‑deep, but readable.

Price: €19.90 (digital, personalized PDF) — delivery via email/download link.

Sample: coming next — will be linked here.

You can place a purchase request here. You will receive payment information via email. After payment, you will get a personal download link (personalized PDF).

Price: €19.90

Note: No VAT is shown according to § 19 UStG (small business regulation).

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