Deployment Tutorial Ss Singapore Cn2 Detailed Explanation Of The Configuration Steps On Common Clients

2026-03-23 15:08:00
Current Location： Blog > Singapore CN2

1.

overview and preparation

• goal: deploy shadowsocks(ss) on a vps routed by singapore cn2 and configure the connection in common clients.
• prerequisite: you have purchased a vps that supports cn2 (1gbps bandwidth and fixed public ip recommended).
• system: the example uses ubuntu 20.04 lts, 1 vcpu/1gb ram, traffic billing or annual subscription are available.
• ports and security: have ssh(22) and shadowsocks ports ready (example 8388), and plan firewall rules and fail2ban.
• backup and monitoring: it is recommended to enable snapshots and use prometheus/grafana or simple scripts to monitor bandwidth and connection numbers.

2.

server procurement and basic network configuration

• purchasing advice: choose a computer room that supports cn2 (for example, some singapore operators can use cn2 for backhaul), and the bandwidth is 500mbps-1gbps, which is better.
• network information example: ip: 203.0.113.45 (example reserved address), public network bandwidth: 1gbps, downlink peak value up to 900mbps.
• system initialization: apt update && apt upgrade; create a non-root administrator user and disable password login using only keys.
• firewall: ufw allow 22/tcp; ufw allow 8388/tcp; ufw enable; it is also recommended to limit ssh to only management ip.
• ddos prevention: if there is a high risk, you can first enable cloud cdn/protection or apply for a traffic cleaning strategy from the provider.

3.

shadowsocks server installation and configuration (sample data)

• installation: shadowsocks-libev is recommended. example command: apt install shadowsocks-libev -y.
• configuration file /etc/shadowsocks-libev/config.json (example):
 {
  "server":"0.0.0.0",
  "server_port":8388,
  "password":"s3cur3p@ssw0rd",
  "method":"chacha20-ietf-poly1305",
  "timeout":300,
  "fast_open":true,
  "nameserver":"8.8.8.8"
}
• startup and auto-start: systemctl enable --now shadowsocks-libev.service; check netstat -tunlp to confirm 8388 monitoring.
• performance optimization: enable tcp fast open, adjust sysctl (net.core.somaxconn=1024, net.ipv4.tcp_tw_reuse=1, etc.).

4.

common client configuration steps (windows/android/ios/linux)

• windows (shadowsocks-windows): create a new server, enter the server ip 203.0.113.45, port 8388, password s3cur3p@ssw0rd, encryption method chacha20-ietf-poly1305, and start the system agent or pac.
• android (shadowsocks-android): configuration is the same as above, check "udp forwarding" if necessary, or use plug-ins such as v2ray-plugin to enhance obfuscation.
• ios (shadowrocket or potatso): import the configuration or fill it in manually. it is recommended to enable tcp fast open and routing rule diversion (only proxy specific domain names).
• linux (shadowsocks-qt5/ss-local): edit the client configuration, run ss-local -c client.json and set the local proxy port.
• plugins and obfuscation: if you need to avoid dpi, you can enable v2ray-plugin or simple-obfs (example plug-in parameters: --plugin v2ray-plugin --plugin-opts "server;path=/ss").

5.

performance testing and real case data

• actual test environment: vps (singapore cn2 node, 1gbps), test time: 2025-10-01, test tools: iperf3 and ping.
target city average rtt(ms) download peak(mbps) remark
beijing 45 420 cn2 return good
shanghai 40 460 stablize
guangzhou 42 430 slight jitter

• case description: a customer can still maintain 400mbps+ stably during peak hours using the above configuration. the encryption method uses chacha20-ietf-poly1305, and there is no obvious cpu bottleneck (cpu utilization under 1 vcpu is often <60%).

6.

security hardening, cdn and ddos defense recommendations

• minimum privileges: close unnecessary ports and open only the shadowsocks port and ssh (the port can be changed and the source ip can be restricted).
• fail2ban: set ban rules for failed ssh and ss connections to reduce the risk of brute force cracking.
• cdn usage scenarios: if only http/https services are provided, it is recommended to place them in cdn; shadowsocks itself cannot be placed directly in cdn, but it can disguise the obfuscated traffic as https and combine it with cloud cleaning.
• ddos response: purchase a bandwidth package with cleaning or sign a cleaning sla with the computer room; set traffic threshold alarms and automatic speed limits.
• logs and auditing: regularly check /var/log/syslog and ss logs, set bandwidth and connection thresholds, and expand or adjust routing policies if necessary.

singapore cn2
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