Does Cisco AnyConnect Work in China? What to Do When a Server Is Blocked

AnyConnect traffic is standard TLS; from the outside it looks like a visit to an HTTPS website. It is the default for corporate intranets, and foreign companies’ offices in China use it every day, so blocking it wholesale is expensive.

Proprietary VPN apps have the opposite problem: their protocol is their own, its fingerprint is fixed, and once it is recognised the whole app stops working — and the app itself gets pulled from stores. The AnyConnect client is published by Cisco, and the open-source alternative OpenConnect exists for Windows, macOS, Linux, iOS and Android, so the client layer cannot be taken away.

What gets blocked is a server address. When one is flagged, that machine becomes unreachable and the others are unaffected. RoyalShield runs its own machines in 24 regions; a flagged address is replaced with a new one, the domain updates automatically, and the address saved in your client stays the same.

1. Download the installer for your system from this site’s AnyConnect page. Windows 10 and later, macOS, iOS, Android and Linux are all covered; Windows 7 and 8 can only use version 4.9, the last one that supports them.
2. Open the client and enter the server address your provider gave you. RoyalShield users click a region’s flag on this site to copy that region’s address.
3. Enter your username and password. AnyConnect needs no certificate file and no configuration import; the same two credentials work on every device.
4. Once it shows “Connected”, open an IP-lookup page to confirm the exit is in the region you chose.

1. Try another region’s address. This is the fastest test: if another region connects, that one server is temporarily unreachable — wait a few minutes or use another region.
2. Change networks. If home broadband fails, try mobile data once, and vice versa. Blocking often differs between carriers.
3. Read the client’s error. “Login failed” means wrong credentials or an expired account; “Untrusted server certificate” usually means the system clock is wrong or the current network is intercepting TLS — switch networks; only “Connection attempt has failed” means the address is unreachable.
4. Update the client to the latest version. Compatibility problems in old versions show up as connection failures, especially after a major OS upgrade.
5. If none of that works, switch connection method. The same account can use OpenVPN or sing-box to reach the same servers, and blocking of the three protocols is independent.

Cisco renamed AnyConnect to Cisco Secure Client; features and usage are unchanged. You do not need to uninstall first: install the new version over the old one and it keeps your saved server addresses.

Windows 10 and later and macOS use the 5.x line; Windows 7 and 8 stay on 4.9, the final version for those systems. On phones, update through the App Store or Google Play.

If the app store in your region does not list Cisco Secure Client, use the open-source OpenConnect client instead — same protocol, same username and password.