All news with #cloudflare tag

🐍 Cloudflare has announced Python Workflows in beta, enabling developers to orchestrate multi-step, durable applications on Workers using Python. The feature aims for feature parity with the existing JavaScript SDK while adapting APIs to Pythonic idioms—using decorators for step callbacks and snake_case naming for method calls. Under the hood it leverages Pyodide and CPython in the runtime, exposes WorkflowStep as an RPC-backed JsProxy for at-most-once durable execution, and supports DAG-style concurrency via asyncio.gather. Targeted use cases include data pipelines, ML/LLM training loops, and autonomous agents where step-level retries, state persistence, and explicit wait points simplify orchestration.

🔐 Cloudflare unveiled a self‑serve BYOIP API enabling customers to onboard and manage their own IP prefixes via automated workflows. The new flow replaces manual LOA reviews with a two-step validation that uses RPKI ROAs plus either IRR route-object modification or a reverse DNS validation token. Cloudflare will auto-generate LOA-style documentation for operators that still require it and enforces a default service binding to prevent accidental prefix blackholing. The initial rollout supports prefixes originated from AS13335 and is designed to shorten deployment timelines while strengthening routing security.

🚀 Cloudflare has open-sourced tokio-quiche, an async QUIC library that combines its quiche transport implementation with the Tokio async runtime. The project provides a battle-tested integration for async UDP I/O and HTTP/3, delivering low-latency, high-throughput handling of millions of requests per second without requiring developers to wire a sans-io stack. tokio-quiche includes an HTTP/3-focused driver, examples, and abstractions such as ApplicationOverQuic so teams can build clients and servers more quickly. It already powers Cloudflare Proxy B in Apple iCloud Private Relay, Oxy-based proxies, and Warp’s MASQUE client, and aims to accelerate broader adoption of HTTP/3 and QUIC.

🎧 Cloudflare Stream now lets developers extract audio-only M4A tracks from videos with a single API call or dashboard action. Use Media Transformations (mode=audio) for on-the-fly clipping or create persistent audio downloads for VOD-managed content. This reduces bandwidth, cost, and complexity for transcription, translation, moderation, and other audio-first AI workflows.

🔒 Amazon announced that CloudFront now supports cross-account VPC origins, enabling distributions to reach ALB, NLB, and EC2 origins inside private subnets across different AWS accounts. Customers can grant access via AWS RAM, including across Organizations and OUs, removing the need to place origins in public subnets. The capability is available in AWS Commercial Regions at no extra charge and is designed to simplify security and multi-account operations.

🛡️ Cloudflare has begun redacting and hiding domains tied to the rapidly growing Aisuru botnet after those malicious hostnames repeatedly appeared atop its public domain rankings. The botnet — comprised of hundreds of thousands of compromised IoT devices — recently shifted from querying 8.8.8.8 to 1.1.1.1, flooding Cloudflare’s resolver and skewing popularity metrics. Cloudflare says attackers are likely both manipulating rankings and mounting attacks on its DNS service, and the company is refining its ranking algorithm while removing known malicious entries.

🌐 Cloudflare announced the open beta of Workers VPC Services, enabling Workers to securely reach APIs, containers, VMs, serverless functions and databases inside regional private networks via Cloudflare Tunnels. Developers register services by hostname or IP and bind them to Workers, with access verified at deploy time to restrict Workers to only the declared service. The model reduces cloud lock‑in, mitigates SSRF risk, and is available free during the beta.

🧪 Cloudflare has added local, isolated testing APIs for Workflows, enabling developers to introspect and mock workflow instances using the new cloudflare:test module. Available with @cloudflare/vitest-pool-workers v0.9.0+, the APIs (introspectWorkflowInstance and introspectWorkflow) let tests run offline inside the Workers runtime, mock step results and events, and preserve isolated storage for reliable, deterministic tests. This improves debug visibility, reduces flaky tests, and lets teams assert on intermediate steps without hitting external systems.

🔍 Cloudflare researchers revisited historic telemetry to assess reports that Turkmenistan experienced an unprecedented easing of IP address blocking in mid‑2024 and may have been testing a new firewall. Using Radar metrics, they observed a clear surge in HTTP requests beginning in mid‑June, alongside shifts in TCP reset and timeout patterns. These connection anomalies manifested at different stages of the TCP lifecycle across multiple autonomous systems, and while the data cannot provide attribution, the observed patterns are consistent with large‑scale filtering or firewall testing.

🧟 Cloudflare details 'BGP zombies' — routes that remain in the Default-Free Zone after a withdrawal due to path hunting, delayed processing, or MRAI timers. Through experiments and BYOIP on-demand tests, they show how more-specific withdrawals can trigger loops and long-lived reachability issues, often worse on IPv4. Cloudflare proposes graceful draining, a multi-step BYOIP failover using same-length native announcements, and vendor adoption of RFC9687 to reduce impact.

🔍 This post investigates why Cloudflare returned ENHANCE_YOUR_CALM for internal HTTP/2 traffic and traces the issue to an easy-to-make Go client behavior. An incorrect pattern where a response is closed without being fully read caused the Go HTTP/2 library to emit RST_STREAM and PING frames in quick succession, triggering PING-flood mitigations. The fix: always drain response bodies (for example, io.Copy(io.Discard, resp.Body)) before calling Close().

🔒 Lena Heimberger examines the challenge of building post-quantum Anonymous Credentials that are practical for large-scale use. The post summarizes real-world needs — from the EU digital identity wallet to Cloudflare’s Privacy Pass rate-limiting — and defines key requirements like unlinkability, unforgeability, round-optimality, and per-origin rate limits. It surveys PQ approaches (generic ZKP composition, lattice-based signatures, hash-and-sign with aborts, and MPC-in-the-head/VOLEitH), evaluates trade-offs in bandwidth and latency, and calls for standardized ZK-friendly hashes and PQ-native protocol designs.

🔐 Cloudflare presents a privacy-first approach to rate-limiting AI agents using anonymous credentials. The post explains how schemes such as ARC and ACT extend the Privacy Pass model by enabling late origin-binding, multi-show tokens, and stateful counters so origins can enforce limits or revoke abusive actors without identifying users. It outlines the cryptographic building blocks—algebraic MACs and zero-knowledge proofs—compares performance against Blind RSA and VOPRF, and demonstrates an MCP-integrated demo showing issuance and redemption flows for agent tooling.

🔐 Amazon Bedrock AgentCore Browser now previews Web Bot Auth, a draft IETF protocol that cryptographically identifies AI agents to websites. The feature automatically generates credentials, signs HTTP requests with private keys, and registers verified agent identities to reduce CAPTCHA interruptions and human intervention in automated workflows. It streamlines verification across major providers such as Akamai, Cloudflare, and HUMAN Security, and is available in nine AWS Regions on a consumption-based pricing model with no upfront costs.

📊 Cloudflare shares aggregate measurements of TCP connections observed across its global CDN from a uniformly sampled 1% snapshot (Oct 7–15, 2025). The dataset records socket-level metadata via TCP_INFO, SNI, and request counts, limited to gracefully closed connections with at least one HTTP request. Results highlight strong heavy-tailed behavior: most connections are short and small while a minority carry massive volumes, and HTTP/2 shows higher reuse and larger responses than HTTP/1.x.

🐟 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 describes a supervised approach to detect large-scale IP sharing — especially CGNAT — to reduce collateral damage from IP-based security controls. They build labeled training data using distributed traceroutes (RIPE Atlas), PTR/WHOIS scraping, and lists of known VPN/proxy exit IPs, then extract per-IP and per-/24 behavioral features. An XGBoost model trained on these features achieves high accuracy, enabling operators to tune rate limits and blocklists with less harm to innocent users, particularly in regions with heavy IP sharing.

🛡️ Cloudflare explains how it initially implemented WARP as a Layer‑3 VPN by leveraging the Linux networking stack to egress arbitrary user packets from edge machines. They used a TUN device, nftables/Netfilter rules and the conntrack module to perform NAT, mark flows, and distinguish client traffic from locally‑originated traffic. Core tunnel handling was written in Rust (boringtun/WireGuard) and paired with MASQUE and defense‑in‑depth controls. The approach worked but required one IPv4 address per server, creating a scalability and cost challenge that led them to explore IP sharing.

🔒 Cloudflare patched two QUIC ACK-handling vulnerabilities (CVE-2025-4820, CVE-2025-4821) affecting its open-source quiche library and services using it. The flaws—missing ACK range validation and an Optimistic ACK attack—could let a malicious peer inflate server send rates, driving CPU and network amplification. Cloudflare implemented ACK range enforcement and a dynamic, CWND-aware skip frequency; quiche versions prior to 0.24.4 were affected.

🛡️ Cloudflare assisted the Moldovan Central Election Commission (CEC) during the September 28, 2025 parliamentary vote, rapidly onboarding election sites and deploying mitigations under the Athenian Project. On election day Cloudflare mitigated over 898 million malicious requests across multiple DDoS waves, including a peak of 324,333 rps, keeping official result reporting and civic sites online. Automated defenses and coordination with STISC ensured no interruptions to public access and authoritative information.