The Best Practice Of Combining Japanese Native Ip With Cdn And Proxy

1.

overview: why choose japanese native ip combined with cdn/proxy

(1) japanese native ip refers to the public ip assigned by japanese isp and routed within the japanese backbone network. the delay and stability are better than overseas forwarding ip.
(2) combining native ip with cdn can achieve lower-latency first packet response in japan, and achieve global distribution and caching through cdn.
(3) proxy (reverse proxy, transparent proxy or socks/http proxy) can hide the native ip, perform traffic cleaning and protocol layer optimization.
(4) the combined solution can simultaneously meet seo, compliance, user experience and ddos defense needs, improving usability and security.
(5) this article will cover server/vps configuration, domain name resolution, cdn strategy, proxy configuration and real data examples to facilitate implementation.

2.

architecture design: typical japanese native ip + cdn + proxy topology

(1) front-end: the global cdn node (anycast) serves as the entrance to handle static resource caching and tls termination.
(2) middle: when the cdn returns to the origin, it returns to the reverse proxy node (native ip) in japan. this node implements dynamic request acceleration and security policies (waf, rate limiting).
(3) backend: japanese vps/dedicated server as application server and database, intranet or dedicated line connection reverse proxy.
(4) alternate path: when suffering a large traffic attack, the cdn absorbs the traffic and directs the malicious traffic to the cleaning center, and the only return-to-source ip is restricted by acl.
(5) domain name resolution: use smart dns (based on geography and health checks) to point japanese traffic to japanese cdn/proxy or directly back to the origin to reduce the number of back to origin.

3.

server and vps configuration example (real case: an e-commerce company deployed in tokyo)

(1) case background: during the peak period of e-commerce business, the peak daily concurrent access is 15,000 rps, and the main japanese users account for 78%.
(2) native node configuration (tokyo physical machine): cpu 8 cores, memory 32gb, nvme 480gb, bandwidth 1gbps, unlimited traffic, operating system ubuntu 22.04.
(3) reverse proxy configuration (vps, tokyo): cpu 4 cores, memory 8gb, bandwidth 200mbps, running nginx 1.21 + mod_pagespeed + fail2ban.
(4) cache layer: varnish 6.6 is used as a reverse cache, with a default ttl of 300s, and cache hit backend requests are reduced by about 85%.
(5) database backend: main database 16 cores/64gb memory, master-slave synchronization delay <50ms, regular snapshots and daily incremental backups.

4.

performance and data display: latency, cache hits and ddos capacity examples

(1) measured latency (average) under the above architecture: 8-12ms within tokyo, 70-90ms from japan to shanghai, and about 120-160ms on the west coast of the united states.
(2) cdn cache hit rate: 92% for static resources and 65% for html (increased to 78% after enabling edge side includes).
(3) ddos protection capability: using anycast cdn + cleaning center, peak absorption capacity 200gbps, return-to-source speed limit and connection threshold protection.
(4) bandwidth indicators: normal business bandwidth consumption is about 120mbps, peak outbound traffic through the cdn entrance can reach 600mbps during peak periods, and the maximum number of concurrent connections back to the origin can reach 2,000.
(5) the following table shows the average latency and cache hit rate from japan to major regions (sample data):

5.

best practices and configuration suggestions for integrating with cdn

(1) back-to-origin hiding: the cdn back-to-source ip whitelist only allows cdn or custom proxy source access, and the native ip is not directly exposed in dns.
(2) hierarchical caching strategy: long ttl for static resources (7 days), short ttl for html and enable edge caching and stale-while-revalidate.
(3) compression and protocol optimization: enable gzip/brotli, http/2 or http/3, and turn on tls 1.3 to reduce handshake delay.
(4) health check and automatic switching: dns or load balancer performs health detection, and automatically switches to the backup node or downgrades to a static page when abnormal.
(5) back-to-source connection pool: use long connections and keep-alive, nginx upstream keepalive 64, worker_connections is set to 65535.

6.

proxies and security: how to use proxies to improve availability and ddos defense

(1) forward proxy/transparent proxy is used for traffic collection and log desensitization; reverse proxy is used for request mitigation and tls termination.
(2) rate limit: nginx limit_req_zone is 20 times per second, for example, burst 50, which can prevent slow connections from running out of resources.
(3) syn/udp attack protection: enable syn cookies, net.core.somaxconn tuning and iptables black hole routing at the kernel layer.
(4) waf and rule management: deploy waf (such as modsecurity or commercial waf) at the proxy layer to automatically block common attack signatures.
(5) logs and alarms: combined with elk/prometheus for real-time traffic analysis, automatic expansion or switching of cleaning paths when thresholds are triggered.

7.

key points of migration and operation and maintenance: implementation steps and common problems

(1) step suggestions: first enable the "cache only" mode on the cdn and observe the hit rate → deploy a japanese reverse proxy and whitelist the cdn back to the origin → gradually switch dns to cdn.
(2) test scenario: conduct grayscale stress testing, simulate high concurrency and ddos attacks, and verify cleaning and back-to-source current limiting strategies.
(3) cost control: bandwidth billing in japan is usually more expensive than overseas. it is recommended to maximize the use of cdn edge caching for static resources to reduce return-to-origin traffic.
(4) legal compliance: if user data storage is involved, pay attention to japan's relevant privacy regulations and cross-border transmission compliance requirements.
(5) common problems: back-to-origin exposure (check dns/whois/email headers), certificate issues (use let's encrypt or cdn hosting certificates), slow start (tuning tcp window and keep-alive).