Rome, Italy, May 13th, 2026, CyberNewswire
RaccoonLine, a decentralized VPN built on VLESS protocol and peer-to-peer node infrastructure, today released a protocol comparison report evaluating WireGuard, OpenVPN, and VLESS against the filtering infrastructure deployed in countries running active deep packet inspection.
Three protocols dominate the VPN market in 2026: OpenVPN, WireGuard, and VLESS. In countries without active censorship, differences between them are mostly about speed and compatibility. In environments with state-level deep packet inspection, protocols show different levels of resilience depending on implementation and network conditions.
OpenVPN: The Legacy Protocol
OpenVPN has been in use since 2002. It is the most widely deployed VPN protocol in the world, supported by virtually every commercial VPN provider and most enterprise deployments.
It has been widely analyzed for over a decade. OpenVPN starts every connection with a fixed opcode sequence: P_CONTROL_HARD_RESET_CLIENT_V2, followed by a session ID and a packet ID of 0x0000. This handshake is unique to OpenVPN. DPI systems were trained on it years ago.
Detection rates in environments such as China and Iran are high in many observed cases. A fresh OpenVPN server is often identified and blocked within hours. Obfuscation wrappers exist — obfs4, Stunnel — but they add latency and complexity, and some advanced DPI systems may also analyze them.
OpenVPN remains widely used in unrestricted environments and continues to be deployed in enterprise and commercial VPN infrastructure.
WireGuard: Fast, Modern, Detectable
WireGuard was introduced in 2016 and became the standard recommendation for new VPN deployments by the early 2020s. It is significantly faster than OpenVPN, with a simpler codebase of roughly 4,000 lines versus OpenVPN’s hundreds of thousands.
Most major VPN providers switched to WireGuard as their default protocol. Most decentralized VPN products — Mysterium, Sentinel’s WireGuard nodes, Orchid — run on it.
WireGuard uses a recognizable handshake structure. DPI systems have been able to identify it in some environments. In China, WireGuard servers are often identified and blocked within hours to days after deployment. In Iran, similar patterns have been observed.
WireGuard also has no built-in obfuscation. The protocol was designed for speed and simplicity, not stealth. Adding obfuscation on top requires third-party wrappers, which introduce their own fingerprints.
WireGuard is widely adopted for performance-focused deployments in unrestricted environments, with deployment outcomes varying in networks with advanced filtering.
VLESS: Built for Invisibility
VLESS was developed as part of the V2Ray project, specifically to address the detection problem that affected earlier protocols, including V2Ray’s earlier VMess.
The design principle is minimalism. Where OpenVPN adds 100+ bytes of identifiable overhead per packet, VLESS adds 25 to 50 bytes with no distinctive structure. The protocol wraps routing information in standard TLS, making traffic appear similar to HTTPS connections to legitimate websites.
With REALITY transport — which borrows the TLS certificate of a real, high-traffic website — the traffic not only looks like HTTPS, it also aligns with expected TLS behavior for that domain. Active probing by censorship systems returns responses consistent with the referenced site.
Detection rates for correctly configured VLESS servers in China and Iran are generally lower in observed deployments. Servers that would be blocked within days using other protocols may remain active for extended periods. VMess, VLESS’s predecessor from the same project, was impacted by DPI updates in September 2025 with higher detection rates. VLESS has not been similarly impacted in the same way.
Tradeoff: VLESS is not as fast as WireGuard in ideal conditions. The TLS wrapping adds processing overhead. For users in unrestricted environments where WireGuard works, the speed difference is measurable.
VLESS is designed with a focus on operating in environments with advanced DPI filtering and TLS-based traffic shaping conditions.
What This Means for Choosing a dVPN
Most decentralized VPN products on the market use WireGuard. For users in the US, Europe, or other countries without active DPI, that is a reasonable choice — WireGuard is fast, audited, and well-supported.
For users in China, Iran, Turkey, or any country running machine-learning DPI, WireGuard is effectively blocked. The protocol choice determines whether the VPN works at all, independent of node count or pricing.
RaccoonLine uses VLESS with Wandering Flow routing. The choice was made specifically for users whose threat model includes state-level traffic filtering. Users who need exit node volume in unrestricted environments will find WireGuard-based products better suited to that use case.
About RaccoonLine
RaccoonLine uses VLESS rather than WireGuard. The decision reflects the protocol comparison covered in this article: WireGuard is faster in unrestricted environments, but VLESS is the protocol that survives where WireGuard does not. RaccoonLine is built for users whose threat model includes active DPI, and the protocol choice is central to that. Decentralized file storage is included alongside VPN clients for Windows, macOS, iOS, and Android. raccoonline.com