Overseas AI Service Network Compliance and Leak Self-Check Guide

When using overseas large language model services, incorrect network configuration can cause two main problems. First, network information may be inconsistent, which can trigger security checks on the service side. Second, the local network may expose information that should remain private, such as the real public IP address or DNS queries.

This article focuses only on diagnosing these configuration issues and following principles that comply with service terms. It does not provide methods for bypassing platform rules or regional restrictions.

1. Clarify the Acceptable Use Boundaries

Start by reading the provider’s terms of service. Most AI services specify supported regions, account identity requirements, and prohibited activities. If your location is outside the provider’s supported regions, use a compliance channel officially provided by the service, or contact the provider directly.

The purpose of a self-check is to confirm that your device is operating as expected—for example, whether the proxy covers all applications and whether any local information is being exposed unintentionally. Passing these checks does not guarantee that an account will not be restricted. The provider’s published rules and risk-control policies take precedence.

2. Exit IP: Verify the Address Seen by the Service

The exit IP is the source address directly visible to the service. An IP address shown in a web browser does not prove that command-line tools or scripts are also using the proxy, so you should perform a command-line check.

# Query the exit IP through the local proxy port.
# Port 7890 is only an example; change it to match your proxy software.
curl -s --proxy socks5h://127.0.0.1:7890 https://api.ip.sb/geoip
# Query without using the proxy for comparison
curl -s --noproxy '*' https://api.ip.sb/geoip

socks5h means that domain name resolution is also handled by the proxy. When using socks5, the local machine resolves the domain first, which can itself result in DNS leakage.

When interpreting the response, the returned ip should be the address of the proxy node, and the country field should match the node’s location. asn and organization usually identify a data center or cloud service provider. If both commands return the same IP address, direct traffic is probably not being covered by the proxy.

IPv6 must also be tested separately:

curl -s -4 --proxy socks5h://127.0.0.1:7890 https://api.ip.sb/ip
curl -s -6 --proxy socks5h://127.0.0.1:7890 https://api.ip.sb/ip

If the -6 request times out or fails, the local machine may not have IPv6 connectivity, or IPv6 traffic may not be passing through the proxy. Check the routing table to determine which is the case.

A common cause is that PAC routing rules do not include the target domain, causing that domain to connect directly. To troubleshoot, add the domain to the proxy rules or temporarily switch to global mode for testing.

Use the following commands to inspect the routing table:

• macOS: netstat -rn
• Linux: ip route

Confirm that the default route points to the proxy’s virtual network interface.