Security

Server authentication is the process of verifying your identity to gain authorized access to a remote system, hosting control panel, or online service. The three dominant methods are password-based SSH, SSH key-pair authentication, and web-based control panel login — each with distinct security profiles, use cases, and failure modes that every administrator must understand. Whether […]

Apache's `htpasswd` authentication provides HTTP Basic Authentication — a server-side access control mechanism that challenges any browser request with a username/password prompt before serving content. It requires zero application-layer code, operates entirely within Apache's module system, and is enforced at the web server level before any PHP, Python, or Node.js backend logic executes. This makes […]

A FileZilla connection timeout error occurs when the FTP client fails to establish or maintain a connection to the remote server within the configured time threshold. The root cause is almost always one of four categories: misconfigured client settings, network-layer interference (firewalls, NAT, routers), server-side service failures, or protocol mismatch between client and server. This […]

MAC flooding is a Layer 2 network attack that deliberately exhausts the CAM (Content Addressable Memory) table of an Ethernet switch by injecting thousands of frames with spoofed, randomized source MAC addresses. Once the CAM table reaches capacity, the switch degrades into hub-like behavior — broadcasting all incoming frames out of every port — which […]

SFTP (SSH File Transfer Protocol) is a network protocol that provides file access, file transfer, and file management over a reliable data stream. Unlike legacy FTP, SFTP operates exclusively over an encrypted SSH-2 channel, meaning both authentication credentials and payload data are protected against interception, man-in-the-middle attacks, and packet sniffing — making it the de […]

NET::ERR_CERT_AUTHORITY_INVALID is a browser-level TLS handshake failure that occurs when the certificate presented by a web server cannot be traced back to a root Certificate Authority (CA) trusted by the browser's built-in trust store. The browser terminates the connection before any data is exchanged, displaying this error to prevent exposure to man-in-the-middle (MITM) attacks, data […]

In the digital realm, safeguarding your infrastructure begins with a robust hosting solution. AlexHost offers Dedicated Servers equipped with cutting-edge security features, such as DDoS protection, data encryption, and regular backups. These features ensure your systems and sensitive data are shielded from evolving cyber threats, allowing you to focus on business growth while we secure […]

In the realm of digital communication, ensuring data security is paramount. An encrypted connection uses advanced cryptographic algorithms to transform readable data (plaintext) into an unreadable format (ciphertext) during transmission. This process protects sensitive information from unauthorized access, ensuring that only parties with the correct decryption key can access the data. Conversely, a non-encrypted connection […]

SSL (Secure Sockets Layer) certificates are essential for encrypting the data exchanged between a client, such as a web browser, and a server, ensuring secure connections. When you visit a website using SSL, your browser stores the SSL certificates in its cache to expedite future connections. However, clearing the SSL cache becomes necessary when an […]

The 401 Unauthorized error is a common HTTP status code indicating that the request requires user authentication. This error occurs when a client attempts to access a resource on a server without providing valid credentials. Understanding the underlying causes and implementing effective solutions is crucial for both system administrators and developers. Understanding the 401 Unauthorized […]