The search for “ipop v4.1 download” is a niche but passionate one. For students of networking who want to study P2P VPN architecture, it is a perfect educational tool. For retro LAN gamers, it is a functional ghost from the past. For everyday privacy, however, you would be better served by modern alternatives.

Final Recommendation: Download IPOP v4.1 for experimentation, learning, or legacy hardware support. For production use or sensitive data, pair it with an additional security layer or upgrade to a maintained P2P VPN solution.

You can connect Docker containers to your IPOP virtual network using --network host. This allows containers to see peer devices directly.

Warning: The official developer website for iPop no longer exists. Downloading from random "Free Software" directories is risky, as these sites often bundle old installers with malware or adware.

If you absolutely need this specific version, look for it on reputable archiving sites:

Do not download v4.1 from links found in YouTube descriptions or unverified forum posts, as these are common vectors for trojans.

Status: High Risk / Likely Unavailable There is no widely recognized, legitimate, or safe public software currently maintained under the exact name "iPop v4.1." Searching for this specific version poses a significant risk of downloading malware, adware, or counterfeit software.

There are two likely scenarios for what you are looking for, both detailed below.

Cause: Your NAT type is Symmetric NAT, forcing all traffic through the TURN relay.
Solution: Configure port forwarding on your router for UDP ports 5000–6000. Switch to a STUN-only setup if possible.