Network Configuration Guide for Research AI Tools: Practical Tips on Clash Proxy Setup and Node Selection

Before building a research collaboration team composed of overseas AI tools like Codex, Claude Code, OpenClaw, and Hermes, many researchers encounter a seemingly basic yet often overlooked hurdle — a stable network access environment. This article is based on a hands-on training session for researchers, focusing on the network proxy configuration issues that must be resolved before accessing overseas AI services, along with practical tips and lessons learned.

Why Network Access Is the First Barrier to Using Research AI Tools

To use AI research assistants like Codex and Claude Code that are deployed overseas, the prerequisite is stable access to their service nodes. The training specifically noted that many researchers — especially older ones — are unfamiliar with proxy tools (commonly known as "VPN" or "circumvention tools"), making this their first stumbling block when entering AI-assisted workflows.

The role of these tools can be simply understood as: providing a stable network channel for accessing overseas services from within China. In actual research work, AI tool calls are often continuous, intensive, and time-sensitive — for instance, during concentrated paper writing or batch data processing phases, a network interruption means a direct halt to the workflow. Therefore, network stability is not a nice-to-have; it's a hard requirement.

Clash Client Management: Subscription Sources and Node Switching Strategies

The mainstream proxy client currently is Clash, whose core function is managing and switching between different proxy nodes. The training mentioned that you can load multiple subscription sources simultaneously in a single Clash client (e.g., "Orange Cloud," "Star Cloud," "Soul Cloud," etc.), with each subscription corresponding to a set of available nodes.

It's important to note that some providers offer an "exclusive version of Clash" — their subscriptions only work in their customized client and won't function when loaded into a generic Clash client. After purchasing, you should check the provider's top-up webpage for any "exclusive client" labels, and download the corresponding version if applicable.

The trainer personally had about four different subscription sources installed simultaneously, precisely for redundancy and backup: when one subscription experiences network instability during a particular time period, you can quickly switch to another one that performs better that day. Running a speed test on nodes before use and selecting those with low latency and high availability is a practical strategy for dealing with network fluctuations.

Subscription Plan Selection Tips: Higher Tiers Mean Smoother Connections

For the frequently asked question of "how to make the network more stable," the training offered an insight that, while not absolute, is quite valuable as a reference:

The price tier of a service plan is often inversely proportional to channel congestion. Most providers offer multiple tiers at 19.9, 29.9, 39.9, 59.9 CNY or higher. The logic is straightforward:

• Lower-priced tiers have a larger user base; the more people sharing the same channel, the more congested it becomes, leading to significantly higher packet loss rates and nodes suddenly becoming unavailable (showing red/unable to connect in the client);
• Higher-priced tiers filter out a large number of users through the payment threshold, resulting in fewer people on the channel and therefore greater stability with fewer interruptions.

The recommendation is: don't buy the lowest tier; choose mid-range or above. If you're in a critical period such as intensive paper writing, purchasing the highest tier actually offers better value for money — the cost difference is usually small, but what you gain is days of uninterrupted availability.

There's also a key detail: some lower-priced tiers don't include US nodes. Taking "Orange Cloud" as an example, tiers below 39.9 CNY don't have US nodes, yet the servers for Codex, Claude, and other services are mostly located in the US. Therefore, you need to select at least a tier that includes US nodes (such as 39.9 CNY and above) to properly use the target AI tools.

Proper Clash Startup and Shutdown Procedures: Avoiding Common Pitfalls

At the configuration level, when using Clash for the first time, you need to click the "wrench" icon in the client to install the virtual network adapter and system proxy components — both must be enabled for successful access to overseas websites.

However, what's really prone to problems is the shutdown procedure. The training shared a typical case: a student installed the tool and then found that domestic websites wouldn't load, thinking the software was broken. In reality, the proxy hadn't been properly shut down.

The correct shutdown procedure should be:

1. Symmetric operation — turn off whatever you turned on. If you enabled the system proxy, disable the system proxy; if you enabled the virtual network adapter, disable the virtual network adapter;
2. Finally, click "Exit" in the settings menu to complete a proper shutdown.

Simply clicking the X on the system tray icon doesn't truly disconnect the proxy. Residual proxy settings will prevent access to domestic websites. This seemingly trivial operational detail is precisely where beginners most commonly get stuck.

Summary: Lay the Network Foundation Before Pursuing AI-Powered Research Collaboration

Before envisioning how an "AI researcher team" composed of Codex, Claude Code, OpenClaw, and Hermes can work collaboratively, stable network access is an unavoidable foundation. Here are the key takeaways from this training:

• Choose services that support generic Clash or their corresponding exclusive clients;
• Maintain multiple subscription redundancies and switch as needed to mitigate single-point network fluctuations;
• Prioritize mid-to-high-tier plans for more stable channels, and confirm that US nodes are included;
• Strictly follow symmetric startup/shutdown procedures to avoid disrupting domestic network access.

Once these foundational environment issues are resolved all at once, you can truly devote your energy to the core workflows of AI-assisted research.