We open a browser, load Google without any problem, a YouTube video plays normally, and yet ShareCloudy shows a connection refusal. This scenario frequently appears on network support forums. The issue almost never originates from the Internet line itself, but from an intermediate link between the workstation and the platform’s servers.
DNS Filtering by the Internet Service Provider: The Most Common Cause on ShareCloudy
Since 2024, several French Internet service providers have tightened their DNS filtering on file-sharing domains. The principle is simple: the Internet box by default uses the operator’s DNS servers, and certain domains are partially or completely blocked.
The typical symptom: ShareCloudy refuses the connection on a fixed line but works on 4G or via another ISP. We can check in a few seconds if we are in this situation. Simply switch the smartphone to mobile hotspot mode and try accessing the site again.
If the site opens on 4G, the blockage is very likely due to the DNS of the box. To understand in detail why ShareCloudy does not allow the connection in this specific configuration, we need to look at the DNS resolvers used by default on the fixed line.
The operational solution is to replace the operator’s DNS with public DNS (Google 8.8.8.8 / 8.8.4.4, or Cloudflare 1.1.1.1 / 1.0.0.1). This change can be made in the network settings of the operating system or directly in the administration interface of the box.
Connection Refused on ShareCloudy: DNS Cache and Session Residues
Even after changing DNS, the problem may persist if the system retains the old resolution in memory. The local DNS cache stores previous responses for several minutes, sometimes several hours depending on the configuration.
On Windows, we clear this cache with the command ipconfig /flushdns in the command prompt. On macOS, the equivalent command is done through the terminal with dscacheutil. On Linux, it depends on the distribution and the active caching service (systemd-resolved, dnsmasq).
The browser cache adds an additional layer. Chrome, Firefox, and others maintain their own internal DNS resolutions. Clearing the browser cache and cookies related to the ShareCloudy domain eliminates this residue. On Chrome, the address chrome://net-internals/#dns allows for specifically purging the browser’s DNS cache without affecting the rest.
Items to Purge in Order
- The DNS cache of the operating system, via the command suitable for the platform (Windows, macOS, Linux)
- The internal DNS cache of the browser, accessible in the advanced network settings
- The cookies and site data stored for the ShareCloudy domain, which may contain expired session tokens
- Any manual entries in the system’s hosts file, sometimes forgotten after a test or previous manipulation
Firewall, Antivirus, and Proxy: Blockages on the Workstation Side
When DNS is not the issue, we look at the security software installed on the machine. A firewall or antivirus with web filtering can block a specific domain without displaying any visible alert. The browser then receives a simple connection refusal, identical to what would be produced by an offline server.
Temporarily disabling the software firewall allows us to confirm or eliminate this possibility. If ShareCloudy opens immediately after disabling, we need to add the domain as an exception in the security software settings, then reactivate the protection.
Proxy configurations pose a similar problem. In a company or on a school network, an HTTP proxy intercepts requests and may refuse certain domains based on filtering rules. In the system’s network settings, we check that no proxy is active by default, or we ask the network administrator to allow the domain.
Active VPN and Incorrect IP Geolocation
A VPN modifies the IP address visible to the remote server. Some cloud services apply regional restrictions, and a poorly geolocated IP can trigger an access refusal. Since the wider deployment of IPv6, some operators assign IP ranges whose geolocation does not correspond to the user’s actual country.
Responses vary on this point: some users resolve the issue by disabling the VPN, while others change VPN servers to obtain a correctly geolocated French IP. An IP verification tool allows us to see which country is detected on the server side before making any changes.
Check if the ShareCloudy Server is Actually Accessible
Before spending time on local configuration, we ensure that the problem does not originate from the server itself. Several online tools allow us to test the availability of a site from different geographical points. If the tool confirms that the server is not responding from multiple locations, the issue lies with the host, and no local manipulation will change that.
However, if the site responds normally from other regions or networks, we know that the blockage is between the machine and the server. We then resume the diagnostic sequence:
- Test in mobile hotspot mode to isolate the fixed network
- Change DNS and purge the system and browser DNS cache
- Check the firewall, antivirus, and proxy settings
- Control the VPN and the actual IP geolocation
This sequence covers the vast majority of cases where ShareCloudy refuses the connection despite functional Internet access. If none of these steps resolve the situation, the problem may stem from a restriction directly applied by the service host on certain IP address ranges, in which case only contacting the platform’s support will help move forward.