Author - 오길호

SecretDNS Update

Recently, there has been an issue regarding SNI eavesdropping, which led us to create and release SecretDPI and SecretSNI. Given the feedback on running various programs separately, we've integrated these features into a single application—SecretDNS—to enable DNS encryption and bypass SNI eavesdropping more efficiently. Additionally, the program now automatically configures DNS settings upon exit. However,...

Secret SNI Deployment

This program prevents eavesdropping and tampering of Server Name Indication (SNI). It was created due to the speed reductions experienced when using existing solutions like Secret DPI, Goodbye DPI, and MTU settings. Only the strings detected in the SNI are fragmented, while other packets are used normally. (1) Before execution (2) After execution Before the...

Installing Go Language - Windows

1. Download and install from https://golang.org/dl/ 2. Create a working folder (e.g., d:\source\Go) 3. Create subfolders: bin, pkg, src 4. Windows Control Panel -> System -> Advanced system settings -> Environment Variables 5. In the User variables section, enter the working folder for GOPATH 6. Set the variable name as GOPATH 7. Set the variable...

Secret DPI Release

This is a program that prevents illegal eavesdropping and tampering through Deep Packet Inspection. We have created a GUI version of GoodbyeDPI to make it more user-friendly. Simply delete the /vendor folder (GoodbyeDPI) and run the standalone SecretDPI.exe. It will operate by changing the MTU. Since it's a workaround that modifies TCP fragmentation and HTTP...

Getting Public IP Address from AWS (PHP)

When using Amazon servers, the server IP displayed is typically a private IP. So, I created this script to fetch the public IP address. <? if(in_array(substr($_SERVER['SERVER_ADDR'], 0, 3), array('172'))) if(strrpos(gethostname(), '.compute.internal')!==false) $_SERVER['SERVER_ADDR'] = file_get_contents('http://169.254.169.254/latest/meta-data/public-ipv4'); echo $_SERVER['SERVER_ADDR']; ?>