Have you ever connected to public WiFi and logged into your account without thinking twice?
What if someone was silently watching — or even controlling that connection?
This is exactly what happens in an On-Path Attack.
What is an On-Path Attacker?
An On-path attacker places themselves between two communicating systems usually a web browser and a web server.
Once in the middle, an attacker can :
Intercept sensitive dataModify communicationImpersonate either side
This type of attack is also know as Man-in-the-Middle(MITM) attack.
Think of it like a rogue postal worker:
Opens your lettersReads your private messagesEdits the contentSends them forward
You never reliaze your communication was compromised.
How On-Path Attacks Works?
You request a websiteThe attacker intercepts your requestThey forward it to a real serverThe response comes back through the attackerThey can read or modify everything
You believe that you’re talking directly to the website — but you’re not.
Common Types of On-Path Attacks
HTTP Interception
Unencrypted HTTP traffic is easy to intercept. Attackers can steal username & passwords and inject malicious scripts.
Session Hijacking
Websites store login sessions in cookies. If cookies are stolen, then attackers can gain access without requiring passwords, and attacker can impersonate the user.
DNS Spoofing(DNS Cache Poisoning)
DNS Spoofing tricks your system into connecting to a fake server.
In this attack, attacker interferes and gives you a fake ip address instead.
So instead of going to real website:
google.com –> real server
You get redirected to:
google.com –> fake server
How to Prevent DNS Spoofing?
Use HTTPS websitesAvoid using public wifi or vpnClear DNS cache regularlyUse secure DNS(like google DNS/Cloudflare DNS)
Email Hijacking
Attackers intercept email communications. In this, attackers put themselves in between an email server and the web.
Once the server is compromised, the attackers can monitor email communications for various purposes.
Once such scam involves waiting for a scenario where one person needs to transfer money to another person.
The attacker can then use a spoofed email address to request the money to be transferred to an attacker’s account. This email will seem legitimate to the recipient(“Sorry, there’s typo in my last mail, my actual account number is : XXXX-1233”) making this attack very effective and financial devastating.
Public WiFi Attacks
Public WiFi is one of the easiest attack points.
Attackers can create fake WiFI networks, monitor traffic and redirect users to the fake websites.
That “free wifi” could cost you your data.
Why On-Path attacks are dangerous?
Invisible to users.Full access to dataData leaksMalware infections
Now the main point is, How you can protect yourself?
There is no single solution, but these practices help significantly:
Use HTTPS(SSL/TLS)Avoid using public WiFi or VPNEnable Multi-Factor Authentication(MFA)Keep Systems updatedVerify Emails Carefully
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On-Path Attacks Explained: How Hackers Secretly Intercept Your Internet Traffic was originally published in Coinmonks on Medium, where people are continuing the conversation by highlighting and responding to this story.