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CenturyLink versus Imperva

Easily compare CenturyLink and Imperva for POP locations, products, pricing, features & support. We hope this helps you better understand the similarities and differences between these content delivery networks.

CenturyLink logo Imperva logo

Company

Company CenturyLink Imperva
Short profile CenturyLink owns and operates a global Tier-1 network and - logically - their CDN runs on top of it. CenturyLink CDN has POPs on all continents and their product focus is on video and large object delivery. CenturyLink CDN is part of the Google Cloud CDN Interconnect. Imperva's CDN (formerly Incapsula) makes your websites and applications faster, more reliable and safer. A global network of servers provides content caching, load balancing and failover, while an enterprise-grade cloud web application firewall and DDoS protection safeguard your site from the latest threats.

Products

  • Yes = Yes
  • Sortof/partially = Sort of/partially
  • No = No
  • Unknown = Unknown
Product CenturyLink Imperva
Dynamic content deliveryNon-cacheable content delivery. User login, shopping cart ... No Yes Content Delivery Network
Small file deliveryStatic object delivery; caching of small files (file size <1 MB) Yes Yes Content Caching
Large file deliveryStatic object delivery; caching of large files (file size >1 MB) Yes Yes
Live videoDelivery of live video. RTMP? Transcoding/transmuxing? Yes CDN Mesh Delivery No
Video on demandDelivery of on demand video Yes CDN Mesh Delivery No
Image OptimizationAutomatic image transformation/compression/optimization No Yes Image Compression
DNSAuthoritative DNS for customer domain No Sortof/partially Name Server (NS) Protection
tooltip Name Server (NS) Protection is a secure proxy in front of your authoritative DNS
WAFWeb Application Firewall No Yes Web Application Firewall
Anti-DDoSDDoS attack protection. Specific product(s) for this. Yes Yes DDoS Protection
Private CDNDedicated edge resources & custom configs No No
Edge ComputeRun your code on CDN edge servers Unknown Unknown

Network

Region CenturyLink Imperva
North America 29 11
Latin America 9 3
Europe 36 11
Russia & CIS 0 1
Asia excl. China 7 11
China 0 0
Oceania 4 3
Middle-East 4 3
Africa 3 1

Pricing

Pricing & contract duration CenturyLink Imperva
Minimum contract term 12 months Unknown
Minimum monthly costs Unknown Unknown
Requests costsCustomers pay for client to CDN requests None Unknown
Ingress costsCustomers pay for origin-to-CDN bytes transferred None Unknown
NA/EU traffic (low volume) Unknown Unknown
APAC traffic (low volume) Unknown Unknown
LATAM traffic (low volume) Unknown Unknown

Features

  • Yes = Yes
  • Sortof/partially = Sort of/partially
  • No = No
  • Extra costs = Extra costs
  • Unknown = Unknown
Web acceleration CenturyLink Imperva
Instant setupSign up, configure, start testing. No Can't sign up and get started. Must talk to sales. Yes
Change propagation delayHow fast do config changes propagate to all POPs? Unknown Yes Instant
Apex/root domain OK Blog: Root domain on CDN and performanceNo performance degradation when using http(s)://domain.com No No global Anycast Yes Anycasted network (regional)
HTTP/2 No Yes FAQ
IPv6Do the edge servers have IPv6? Unknown Yes IPv6 support
Compression CDN Guide: CompressionReduce file size for faster delivery Sortof/partially Resend from origin only
tooltip Does not compress on the edge
Yes Compress on the edge
Origin pull - protocolHTTP only or HTTPS possible too? Yes HTTP and HTTPS. Yes HTTP and HTTPS.
tooltip Can be IP address
Origin pull - Host headerUse client > edge value? Set specific value? Yes Configure specific other Host header
tooltip CDN can also forward client request Host header to origin
Yes Can configure specific other Host header.
tooltip Forward client request Host header is possible
Origin ShieldOne POP pulls from origin, other POPs pull from the shield POP Extra costs Extra costs
Push / uploadStore your content directly on CDN, no customer origin Extra costs FTP, SFTP, rsync. Storage costs apply No
Cache control - CDN caching Sortof/partially Yes Granular control/override rules possible
Cache control - client caching Sortof/partially Yes Granular control/override rules possible
Serve Stale CDN Guide: Serve StaleCDN serves cached but expired content in case origin is in trouble Unknown Yes
Purge CDN Guide: PurgeInvalidate or delete cached objects on CDN Yes Instant Yes Instant
Purge - capabilities Sortof/partially Purge all but not purge by directory or tag or header Yes Purge all, by directory, by file extension, by tag(s)
Analytics Yes Yes Real time perf and security events dashboard
Log files Yes
tooltip Logs are 24h delayed
Yes Available via UI, API, or full SIEM integration
tooltip Logs are not delayed
API Sortof/partially Purge, analytics, configuration (but limited) Yes Purge, analytics, configuration
HTTPS & Content Protection CenturyLink Imperva
CDN domain HTTPSUse the CDN's domain, like cloudfront.net No Yes CDN and SSL/TLS
Customer domain HTTPSYour domain in the CDN's certificate Extra costs Yes
Customer cert HTTPSYour certificate on the CDN Extra costs Yes
Token authentication Extra costs Yes Via authentication header
Geo blocking Extra costs Yes
Hotlink protectionThird parties cannot deeplink to your content Unknown Yes
Basic authenticationUser logs in on the CDN to get content Unknown Yes Two Factor Authentication
IP white/blacklisting Unknown Yes IP address/ranges/subnets, self-service in UI

Support

Customer support CenturyLink Imperva
Documentation Sortof/partially Yes, but not public Yes Yes, public
Humans Yes All customers get 24/7 email and phone support Yes Imperva’s team of support engineers deliver technical assistance 24x7x365 via phone, email, or online via the self service portal