Limitations
Agent Compatibility
Horizon requires Agent version 1.0.19 or higher. Devices running an older Agent version are not compatible with Horizon. Circuits cannot be created targeting an agent below this version, and traffic cannot be routed through incompatible agents. Devices must be upgraded to Agent 1.0.19 or later before they can be used with Horizon. For upgrade instructions, see Upgrading the Agent.
Connection Limits
Circuit domain prefixes are system-generated and cannot be customized, changed, or selected. The core routing properties of a circuit - the agent, target IP address, port, and protocol - are set at creation time and cannot be modified afterward; to change any of these, the circuit must be deleted and a new one created (which receives a new domain). Connection expiration is accurate to approximately 5 minutes, meaning a circuit may remain active for a brief period past its nominal expiration time before the platform detects and deletes it. When a circuit is deleted, whether manually or through expiration, the action is permanent and cannot be undone - the domain, configuration, and all associated data are irreversibly removed.
Logging Limits
The monitoring dashboard displays the most recent 2,000 request log entries and 2,000 access log entries. Older entries are displaced as new ones arrive and are not accessible through the dashboard interface. All filtering and sorting operations are performed on the client side, meaning the full 2,000-entry dataset is loaded into the browser at once - this provides responsive, instant filtering but limits the dashboard to the 2,000-entry window, with no ability to search or display older entries. Pagination in the log tables is set at 10 entries per page and cannot be customized.
Security Limits
Country blocking relies on IP geolocation databases, which are generally 95-99% accurate at the country level but are not infallible. Users routing traffic through VPN services, proxy servers, Tor exit nodes, or cloud-hosted infrastructure may appear to originate from a different country than their actual physical location, allowing them to bypass country blocks. Bot and scanner blocking relies on User-Agent string matching; consequently, sophisticated attackers who spoof their User-Agent to impersonate a legitimate browser bypass this detection. IP blacklisting and whitelisting currently support IPv4 CIDR notation only - IPv6 addresses are not supported.
Proxy Limits
The Horizon proxy enforces a maximum backend response timeout of 60 seconds. If the backend service does not begin responding within 60 seconds of the request being forwarded, the proxy terminates the connection and returns a timeout error to the client. Backend services that require longer processing times are not supported.
The maximum request (upload) size and response (download) size are both limited to 20 MB per request. Requests with a body exceeding 20 MB are rejected by the proxy before being forwarded to the backend. Responses from the backend that exceed 20 MB are truncated. Horizon circuits are not suitable for transferring large files or streaming large payloads.
Network Limits
The backend protocol setting (HTTP or HTTPS) must accurately match the protocol used by the target service. If a circuit is configured with the HTTP protocol but the backend service only accepts HTTPS (or vice versa), the proxy cannot communicate with the backend and requests fail. The Mutexer Agent on the device must have network connectivity to the target IP address and port - Horizon does not create new network routes, VPN tunnels, or firewall rules on the device. If the target service is on a different subnet from the agent and the agent cannot reach it, the circuit does not function. Traffic throughput and latency through a Horizon circuit depend on the network capabilities of the agent device, the speed of the connection between the device and the Mutexer cloud, and the performance of the backend service itself.
Browser Compatibility
The Horizon settings and monitoring dashboards are web-based applications that require a modern browser with JavaScript enabled. They are designed and tested for current versions of Chrome, Firefox, Safari, and Edge. Older browsers or browsers with JavaScript disabled will not be able to use the Horizon interface.