SafeLinked CDN

Overview

Sangfor is a leading Chinese cybersecurity and cloud computing provider whose SafeLinked CDN is a security-centric CDN acceleration and DDoS protection platform. It deeply integrates content delivery with Sangfor's proprietary security engine to deliver full-stack acceleration-to-security protection for government, enterprise, finance, education, and healthcare.

SafeLinked's philosophy is "security-first": all traffic completes DDoS scrubbing, WAF detection, and Bot management at CDN edge nodes, with only validated requests reaching the origin. This shields origin IPs and reduces direct attack risk. By 2026, SafeLinked deploys nodes covering all provinces with multi-carrier BGP (Telecom, Unicom, Mobile). For businesses with explicit compliance needs (MLPS 2.0, industry regulation), its integrated approach beats "CDN + standalone WAF" in cost and operational convenience.

Key Strengths

• Unified CDN+security architecture: Acceleration, DDoS, WAF, and Bot management integrated on one platform with real-time multi-layer edge detection—"acceleration is protection"—with advantages in latency, ops complexity, and TCO over cobbled solutions; see the CDN security features guide.
• Reliable domestic nodes: Full-province BGP multi-line nodes with direct Telecom/Unicom/Mobile interconnection in enterprise-grade data centers, ideal for government, finance, and healthcare.
• Proprietary security engine: DDoS scrubbing (L3/L4 + L7), OWASP Top 10 web attack protection, malicious crawler detection, and CC protection with continuously updated rules for 2026 website security threats.
• Government/enterprise compliance: MLPS 2.0, ISO 27001, CSA STAR with full audit logs, access control, and event forensics plus multi-tenant permission management.
• Unified management console: Full-Chinese visual console for acceleration, security policy, analytics, and audit in one interface; visual rule engine lowers ops barriers.

Product Ecosystem

DDoS High-Defense Scrubbing Center

Sangfor's proprietary scrubbing devices sit at CDN edges, detecting and mitigating: L3/L4 (SYN/UDP/ICMP/ACK Flood) at Tbps scale; L7 (HTTP/HTTPS Flood, CC) via behavior analysis and rate limiting; and connection-based (Slowloris, empty connections, concurrency exhaustion) attacks. Auto and manual modes with CDN log analysis for source tracing.

Web Application Firewall (WAF)

Built on Sangfor's attack signature library and behavioral models: full OWASP Top 10 (SQLi, XSS, command injection, file inclusion, CSRF), custom rules (URI/Header/Cookie/Body/IP), semantic analysis for obfuscated variants, and AI-assisted anomaly detection. Observe-alert-block modes per the WAF configuration guide.

Bot Management

Recognizes Googlebot, Bingbot, and Baidu crawlers; blocks data scraping, price crawling, and credential-stuffing bots via request frequency, User-Agent, IP reputation, and JavaScript challenges, with allow/challenge/block/rate-limit policies that preserve SEO crawling.

Limitations

• Limited overseas nodes: Nodes mostly domestic with limited cross-border performance; use multi-CDN load balancing with Cloudflare and AWS CloudFront for overseas traffic.
• Less cost-effective for pure acceleration: Security integration premium exceeds Bunny CDN when only static acceleration is needed.
• Brand awareness still growing: Less known among small site owners than Aliyun CDN or Tencent EdgeOne, with fewer community and third-party resources.
• Advanced features need sales engagement: High-defense capacity, custom rules, and dedicated support are tied to enterprise packages with opaque pricing.

Use Cases

• Government/enterprise secure acceleration (★★★★★): Government sites, institutions, and SOE portals with MLPS compliance, enterprise-grade nodes, and full-Chinese service teams.
• Financial websites and API protection (★★★★★): Bank, securities, and insurance sites, trading systems, and API gateways defended by DDoS + WAF + Bot integration.
• Education portals and online platforms (★★★★): University sites, online education, and management systems served by domestic BGP nodes nationwide.
• Healthcare internet applications (★★★★): Hospital sites, registration systems, and telehealth with audit logs and encrypted delivery for privacy data.
• SMB basic security acceleration (★★★): Budget-limited sites needing basic protection; integrated architecture beats "CDN + standalone WAF" in cost and ops.

Pricing

Overage is tiered; high-defense capacity beyond plan costs extra; set budget alerts per the CDN cost control guide; enterprise annual frameworks get tiered discounts.

FAQ

• How does it differ from Aliyun CDN / Tencent EdgeOne? SafeLinked's edge is its security DNA from Sangfor with deeper DDoS and WAF expertise; Aliyun and Tencent lead in ecosystem and node scale; see the CDN provider selection guide.
• How much DDoS can it absorb? Tbps-scale scrubbing depending on plan, with basic protection on Basic and custom capacity on Enterprise; see the CDN security features guide.
• Is it suitable for pure acceleration? For static-only needs without security, Bunny CDN is more cost-effective; SafeLinked suits security + acceleration combined.
• Does it support overseas acceleration? Limited overseas nodes; use multi-CDN load balancing with Cloudflare.
• Is there a free tier? No public free tier; Basic is traffic-billed; contact sales to evaluate a trial; see the CDN beginner's guide.