Common questions covering every UD CDN solution, node coverage, security, pricing, and setup. Clear, direct answers to help you decide with confidence, before and after you buy.
UD CDN splits into two dimensions. Regional delivery (Hong Kong / China / Overseas) is chosen by target user location; workload acceleration (Video / Dynamic / Smart) by the nature of your business. The two combine freely, for example a live-commerce platform running Video + China + Smart together.
If your site handles high traffic, serves users across different regions, delivers heavy assets like images, video, or APIs, or simply demands speed and stability, a CDN delivers clear benefits. Even if you serve only local users, a CDN cuts origin bandwidth costs, speeds up loading, and hides the origin address. See What is a CDN.
Run multiple regional CDNs at once and route by user origin, or add Smart CDN for dynamic routing. For example: local users on Hong Kong CDN, Mainland users on China CDN (CN2 GIA), overseas users on Overseas CDN.
Use Video CDN. It natively supports live protocols (HLS, MPEG-DASH, MSS, HDS) and on-demand formats (MP4, M3U8, MOV, WebM, FLV), plus adaptive bitrate, signed URLs, anti-hotlinking, and geo-restriction.
Use Dynamic CDN. It natively supports bidirectional WebSocket acceleration, REST / GraphQL / gRPC APIs, HTTP/3 and QUIC, and terminates SSL / TLS at the edge for millisecond round-trips.
Pay-as-you-go has no long-term contract and bills by actual traffic on a sliding scale, so the more you use the lower the unit price, ideal for variable or first-time traffic. Monthly plans prepay a fixed fee for lower unit rates and more included requests, ideal for steady traffic and predictable cost. All plans are in HKD, billed after use.
All charges are in Hong Kong dollars (HKD) and settled on a post-paid basis.
Basic has a 6-month minimum and Economy a 3-month minimum; other tiers have no contract lock-in. Pay-as-you-go has no long-term contract at all.
Service does not stop. Usage beyond the included quota is billed at the plan overage rate, and the monthly invoice itemises included traffic, overage, and cost.
No. Smart CDN is a fixed HK$20/month per-domain add-on, billed separately from base CDN traffic. Base traffic is billed under the pay-as-you-go or monthly plan for your chosen region.
Four steps to go live: Assess → Set up → Switch → Verify. The domain switch usually propagates worldwide within one business day, the whole process requires no change to your existing server setup, and HK engineers help fine-tune it throughout.
No. UD provides DNS cutover assistance and a parallel-run option, so old and new CDNs can run together until UD performance meets expectations. The domain switch usually propagates worldwide within one business day.
UD CDN works as a reverse proxy, with no changes to your existing backend. Simply point the domain you want to accelerate at the UD CDN endpoint and it goes live; your CMS, API gateway, and ingest server stay exactly as they are.
Natively compatible with WordPress, Shopify, Magento, and WooCommerce, plus RESTful APIs, WebSocket, and HLS / MPEG-DASH streaming.
No. UD China CDN uses China Telecom CN2 GIA lines to nodes around the Mainland, so you can serve Mainland users without an ICP filing.
Every CDN plan includes free Let's Encrypt SSL, a WAF, DDoS protection, and an automatically hidden origin address, with no extra purchase. API workloads can add rate limiting and IP allowlists; video workloads can add token URLs, anti-hotlinking, and geo-restriction.
Auto-issued and auto-renewed; bring your own EV or wildcard certificate if required.
OWASP Top 10 rule set; custom IP allowlists / blocklists.
Network-to-application-layer attack scrubbing, no extra purchase.
The origin IP is never exposed to the public internet, shrinking the attack surface.
Issued by expiry / IP; prevents link leakage and stream theft.
Allow or deny by country or region to meet legal or licensing requirements.
Throttle by IP / token to prevent abuse and crawler drain.
No extra charge. Every CDN plan includes free DDoS protection and a web application firewall (WAF), and automatically hides the origin address to reduce attack risk at the source.
Every CDN plan includes a free Let's Encrypt SSL certificate with auto-renewal. If you hold your own or a commercial certificate (such as EV or wildcard), you can upload it in the console.
Video CDN supports signed URLs (token), referer-based anti-hotlinking, and geo-blocking by country or region. Configure these in the console or the developer API.
UD China CDN serves Mainland users via edge nodes around the Mainland (such as Hong Kong), no ICP filing required. If your business is subject to cross-border requirements under the Data Security Law or PIPL, confirm with your legal counsel; UD can adjust the technical configuration to support you.
All plans commit to 99.99% uptime, with a pro-rata refund of the month's fee on breach, and edge nodes that back each other up. Support comes from a local Hong Kong engineering team, 24/7 with live responses; incidents are prioritised and escalated directly by a senior engineer.
A 24/7 local engineering team is on standby, with a priority handling process for major incidents: a senior engineer escalates directly and proactively updates affected customers.
Enterprise plans and custom deployments can include a dedicated technical account manager (TAM). Contact the sales team via the channels below if you need one.
Yes, we recommend it. For very high concurrency (sports streams, brand launches, flash sales), notify the sales and engineering teams 3–5 business days in advance so we can reserve dedicated resources and standby nodes.
The console lets you add / remove domains, set cache rules (basic and advanced modes), upload your own SSL, configure the WAF and rate limiting, set token URLs and geo-restriction, monitor traffic / latency / hit rate / concurrency in real time, and download invoices and usage reports. Everything is also available via the developer API.
The console lets you add / remove domains, set cache rules, upload your own SSL certificate, configure the WAF and rate limiting, set token URLs and geo-restriction, monitor traffic / latency / hit rate / concurrency in real time, and download invoices. Everything is also available programmatically via the developer API.
The UD CDN console lets you manage multiple domains in one account, with grouping by brand or business unit for usage and invoices.
Yes. The console exports monthly usage reports covering traffic, requests, hit rate, and splits by region / device / line; you can also export to your own analytics platform via the developer API.
Log in to the UD customer portal and view or download monthly invoices, reports, and usage records in the billing area.
Click "Forgot password" on the login page and follow the steps. If you still cannot log in, an engineer can help reset it through the channels below.
UD Smart CDN tracks each line's latency, hit rate, and availability in real time and computes the best path by user region, time of day, and ASN. If any line fails it switches over in milliseconds, with a 99.99% uptime commitment; it all happens in the background, so users just get fast, stable responses.
Traditional routing relies on static rules (BGP config, IP geolocation). Smart CDN adds real-user monitoring (RUM) data and machine learning to adjust paths in real time as network conditions change, and can predict signals of an impending line failure.
UD CDN today focuses on content delivery and line routing. For edge AI inference or compute, combine it with other UD Cloud infrastructure; contact the sales team for details.
No. Smart CDN offers a standard split-rule interface to set policies by region, time, user attributes, and traffic type, with no programming required. For deeper ML-driven custom routing, the UD engineering team can help design it.
Cannot find an answer? Our local Hong Kong engineering team is on standby. Phone numbers are on the contact page.