In a recent LinkedIn post, Chirag Goswami discusses the critical distinction between secure and insecure network ports, emphasizing the risks associated with outdated protocols that transmit data in plaintext. Goswami’s insights serve as a timely reminder for organizations to re-evaluate their network security posture beyond simple port blocking.
The core of Goswami’s message revolves around the evolution of network communication and the necessity of encryption in modern security practices. He highlights that many ports were designed in an era where encryption was not a primary concern, leading to vulnerabilities that persist today.
“Not all network traffic is created equal. Some ports were designed in an era when encryption wasn’t a priority. Today, relying on them can expose credentials, data, and entire systems.”
Goswami elaborates on this by explaining the fundamental difference between older and modern protocols. “Older / insecure protocols often send data in plaintext,” he states, contrasting this with modern alternatives that “use encryption to protect data in transit.” This fundamental shift, according to Goswami, is crucial for safeguarding sensitive information.
Understanding the Threat Landscape
Chirag Goswami points out that sophisticated exploits are not always necessary for attackers to compromise systems. In many cases, simply monitoring network traffic can yield valuable, sensitive data if it is not properly encrypted. This passive form of interception poses a significant threat, especially when dealing with legacy systems or misconfigured networks.
As Goswami argues, the ease with which unencrypted data can be captured makes it a prime target for malicious actors. “Attackers don’t always need sophisticated exploits. Sometimes they just listen to traffic moving through insecure protocols,” he warns. This underscores the importance of proactive security measures that assume potential interception.
The Danger of Plaintext Transmission
The implications of transmitting data in plaintext are severe, according to Goswami. He notes that if data is not encrypted, critical information such as usernames, passwords, and other sensitive details can be easily intercepted. This exposure can lead to account takeovers, data breaches, and broader system compromises.
“If data is not encrypted, usernames, passwords, and sensitive information can be intercepted quietly.”
Goswami provides a clear list of common insecure protocols and their secure modern alternatives, illustrating the practical steps organizations can take to enhance security. These include replacing FTP with SFTP, Telnet with SSH, and HTTP with HTTPS. He also mentions securing email (SMTP with TLS) and DNS (DNS over TLS) as vital components of a comprehensive security strategy.
Beyond Port Blocking: A Protocol-Centric Approach
Goswami’s analysis moves beyond the traditional focus on blocking specific ports to advocating for a more nuanced approach centered on protocol selection and encryption. He emphasizes that effective security today requires more than just access control; it demands the implementation of secure communication by default.
“Security today isn’t just about blocking ports. It’s about choosing the right protocols and ensuring encrypted communication by default,” Goswami concludes. This perspective highlights a paradigm shift in network security, where the choice of protocol and the inherent security features of that protocol are paramount.
By sharing these insights on LinkedIn, Chirag Goswami aims to educate professionals about the ongoing risks of insecure network traffic and encourages a more robust, encryption-first approach to cybersecurity. His post serves as a valuable resource for anyone looking to strengthen their organization’s defenses against common network-based threats.
📝 About This Content
This article is based on insights shared by Chirag Goswami on LinkedIn.
📅 Originally posted on March 28, 2026 | View original post on LinkedIn →