All news with #warp tag

How We Escaped the Linux Networking Stack for Soft-Unicast

🐟 Cloudflare describes building "fish" (SLATFATF), a service to egress packets using soft-unicast address space and the challenges encountered with the Linux networking stack. They found that conntrack and Netfilter interactions can silently rewrite source ports and break connections, so they evaluated several approaches including Netlink manipulation, TCP_FASTOPEN_CONNECT sockets, and routing fixes. Ultimately they preferred terminating and proxying TCP locally to avoid fragile kernel workarounds, after testing that disabling early demux produced only modest CPU effects.

Cloudflare WARP Adds Post-Quantum Key Agreement Support

🔐 Cloudflare's WARP client now supports post-quantum key agreement across both consumer (1.1.1.1) and enterprise (Cloudflare One Agent) offerings, tunneling traffic over MASQUE with hybrid post-quantum/classical ciphersuites. The upgrade provides immediate protection against harvest-now-decrypt-later attacks by wrapping user traffic in post-quantum MASQUE tunnels even when individual connections inside the tunnel are not yet PQ-protected. Cloudflare staged the rollout with temporary downgrades, phased population enablement, and an MDM override to balance robustness and downgrade-resistance while meeting FIPS/FedRAMP constraints.

Cloudflare AI for WARP and Network Troubleshooting Tools

🔍 Cloudflare is introducing two AI-powered tools to simplify troubleshooting for the Cloudflare One SASE platform: the new WARP diagnostic analyzer in the Zero Trust dashboard and a DEX MCP server for Digital Experience Monitoring. Both features are available to all Cloudflare One customers by default and convert diagnostic logs into clear, actionable insights. The WARP analyzer highlights events, device details, and exports JSON for deeper analysis, while the DEX MCP server enables natural-language queries and custom analytics without heavy SIEM integration.