Yavipind

Yavipind is a secure tunneling tool that allows two peers to send packets to each other safely. Whether you're dealing with IPv4, IPv6, or any other packet type, Yavipind has got you covered through a virtual point-to-point device like tun0. Plus, it runs smoothly in the Linux user space!

Why Choose Yavipind?

The reason I created Yavipind was that I wasn't thrilled with other options out there. To help users make informed choices, I've pointed out some security holes in the alternatives:

Security Analysis of Alternatives

VTun Security Issues: This analysis covers VTun's security flaws. It explains how an attacker might modify packets, replay them, and even figure out patterns in plain text. Low-entropy passwords are also easy for hackers to guess.

Tinc's Vulnerabilities: Similar to VTun, Tinc has its share of security issues where attackers can mess with packets and learn about plain text patterns.

Designing with Security in Mind

When I designed the protocol and wrote the software, I focused on a few key criteria: security must be as strong as possible, while still being network efficient and user-friendly.

Network Efficiency Features

• Small Packet Overhead: Just 26 bytes (ESP with DES+MD5 is 32 bytes).


• Packet Compression: Forwarded packets can use deflate (gzip) for compression.


• NAT Compatibility: Yavipind works well over NAT since all tunnel packets go through a single UDP/IPv4 connection. Plus, it sends periodic packets to keep NAT connections alive.


• Peer Unreachability Detection: If one peer goes offline, it gets detected quickly using methods similar to IPv6 neighbor discovery (RFC2461.7).


• Smooth Shutdowns: If one peer needs to stop intentionally, they’ll notify the other immediately.

User-Friendly Usage

You won't have to worry about recompiling your kernel because Yavipind runs in user space! Also, since it uses a virtual device, you can apply existing tools for networking tasks like firewalls or traffic shaping easily.

The Strength of Security

• Packed Security: Every packet exchanged is encrypted using Blowfish CFB and authenticated via HMAC-MD5 (96 bits).


• No Replay Attacks: It utilizes strict anti-replay measures so no packet can be accepted more than once.


• Easier Key Renewal: Hash chains make key transitions smooth without losing any packets during renewal; this also ensures forward secrecy.


• DDoS Protection: Uses cookie exchange during connection setup for extra protection against DoS attacks (RFC2522.3).


• User Data Safety: Even if someone cracks your system later on, they can't decrypt old network traffic thanks to periodic key renewals and secure memory erasure.

If you're ready to explore Yavipind further or want to download it now for Linux systems go check out this amazing