How To Access Us Native Ip In Hong Kong Environment. Specific Steps For Use In Hong Kong.

1.

1. overview and preparation

- target: in the hong kong environment, let the traffic go through the us native public network ip egress to achieve geographical restrictions, testing or compliance requirements.
- requirements: at least one us hosting/cloud vps, supporting static public ipv4 (native ip), ssh access.
- tools: wireguard or openvpn for tunneling, iptables or nftables for snat, systemd or cron for persistence.
- port and bandwidth requirements: common export services recommend a bandwidth of 10mbps or more, and the delay to the united states is usually 80–150ms.
- licensing and compliance: verify that the vps provider allows the required traffic types, and be aware of us/hong kong policy restrictions.
- data backup: prepare domain name, dns hosting account and certificate (let's encrypt) for subsequent binding with https.

2.

2. choose and purchase a us vps (native ip)

- selection criteria: the node is located in the united states (non-cgnat), provides an independent public network ipv4/ipv6, and preferably supports bgp direct connection or a dedicated line.
- model example: 2 vcpu, 4gb ram, 40gb ssd, 1tb traffic (optional on demand), outbound peak bandwidth 100mbps.
- traffic billing: billed monthly or by traffic, example price: $15/month (unlimited traffic speed limit) or $5/month (300gb traffic).
- verify the native ip: after purchasing, check whether it is an independent public network address and belongs to the us as through whois/asn or traceroute.
- login test: ssh root@xxxx (xxxx is the vps public network ipv4), confirm that iptables and sysctl allow forwarding (net.ipv4.ip_forward=1).
- example command: ssh root@34.82.10.12 && sysctl -w net.ipv4.ip_forward=1 (34.82.10.12 is an example us ip).

3.

3. deploy wireguard tunnel and nat to realize traffic egress

- install wireguard: install it on both vps and hong kong clients (ubuntu example: apt update && apt install -y wireguard).
- server wg0.conf example (vps):
[interface] privatekey = server_priv_key address = 10.0.0.1/24 listenport = 51820
[peer] publickey = client_pub_key allowedips = 10.0.0.2/32 - client configuration example (hong kong machine):
[interface] privatekey = client_priv_key address = 10.0.0.2/24
[peer] publickey = server_pub_key endpoint = 34.82.10.12:51820 allowedips = 0.0.0.0/0 persistentkeepalive = 25 - nat and forwarding (on vps):
iptables -t nat -a postrouting -o eth0 -j masquerade
iptables -a forward -i wg0 -o eth0 -j accept && iptables -a forward -i eth0 -o wg0 -m state --state related,established -j accept - verification: curl http://ifconfig.co on the hong kong client should return the vps public ip (example 34.82.10.12), and measure latency and bandwidth (iperf3).

4.

4. domain name binding, ssl and cdn access strategies

- domain name resolution: point the subdomain name a record to the us vps public ip or use cname to point to the load balancing.
- ssl certificate: use certbot to automatically apply for a let's encrypt certificate. example command: certbot certonly --standalone -d us.example.com.
- use cdn: if you need to accelerate or protect the origin site globally, you can enable proxy mode on a cdn such as cloudflare and set the origin site to a us vps.
- origin site direct connection policy: in cloudflare, you can enable the firewall rule "only allow cloudflare ip to access the origin site" to reduce the direct attack surface.
- dns ttl and switching: set dns ttl to 300 seconds to quickly switch back to other exits or backup vps without affecting resolution.
- verify the certificate and link: use curl -v https://us.example.com in hong kong to check the certificate chain and response header to ensure that it is exported through the vps.

5.

5. ddos protection and traffic control

- early protection: prioritize the use of cdn/anti-ddos services (such as cloudflare, akamai or paid bandwidth cleaning) to fight against l3/l4 attacks.
- vps protection: configure fail2ban, connection limit (connlimit), nginx speed limit (limit_req), etc. on the vps to mitigate small-scale attacks.
- network layer current limiting: use tc to shape incoming and outgoing traffic, such as tc qdisc add dev eth0 root tbf rate 100mbit burst 32kbit latency 400ms.
- logging and monitoring: deploy prometheus + grafana or use cloud provider monitoring to set bandwidth/connection alarm thresholds (for example, traffic >500mbps triggers an alarm).
- emergency switchover: prepare multiple backup vps in different regions and a dns quick fallback solution (example: primary us node, backup us2 node, dns automated script switching).
- case suggestion: if the average monthly bandwidth burst may reach >1gbps, it is best to purchase hosting with cleaning services or use cloud load balancing with cleaning.

6.

6. real cases and cost/configuration examples

- case: a hong kong testing team (anonymous) deployed 2 vpss in the united states as exports for cross-border api testing and streaming media unlocking.
- configuration a (master node): 2vcpu / 4gb ram / 100gb ssd / public ip 34.82.10.12 / bandwidth 100mbps / $20/month.
- configuration b (backup): 1vcpu / 2gb ram / 40gb ssd / public ip 34.80.22.45 / bandwidth 50mbps / $8/month.
- cost comparison and bandwidth description table (sample data):

node	cpu	memory	bandwidth	price/month
master node	2 vcpus	4gb	100mbps	$20
backup node	1 vcpu	2gb	50mbps	$8

- implementation results: after the hong kong end is exported through wireguard, curl ifconfig.co returns 34.82.10.12, the average http request delay is 120ms, and the video playback rtt is controllable.
- summary: follow the steps to purchase native ip vps, deploy tunnels and nat, and combine cdn and ddos strategies to stably use u.s. native ip exports in the hong kong environment.