SSH Tunnelling to Punch Through Corporate Firewalls – Updated take on one of the oldest LOLBINs
This write-up discusses advanced SSH tunneling techniques for network penetration testing and red team engagements. It focuses on using the native OpenSSH client in Windows 10/11 to create reverse dynamic SOCKS proxies, allowing testers to access internal networks and run offensive tools remotely. The guide covers: 1. Using the -R flag for reverse dynamic proxies 2. Techniques to bypass corporate firewalls, including using Azure domains and ASN IP ranges 3. Methods for payload delivery and data exfiltration using SCP 4. OpSec-safe PowerShell script execution through SSH The write-up also includes recommendations for defenders, such as removing the SSH client from non-technical staff endpoints, securing corporate firewall settings, and monitoring for SSH binary execution.
FEATURES
SIMILAR TOOLS
A comprehensive Windows command-line reference guide for security professionals, system administrators, and incident responders.
A comprehensive guide for system administrators to detect and identify potential security threats on Windows 2000 systems.
BPF+ is a generalized packet filter framework that achieves both high-level expressiveness and good performance for network monitoring and intrusion detection applications.
A comprehensive guide to securing Industrial Control Systems (ICS) from cyber threats, published by NIST.
A comprehensive cheat sheet for accessing Windows systems from Linux hosts using smbclient and rpcclient tools, covering password management, user and group enumeration, and more.
A comprehensive guide for computer security incident handling, providing guidelines for establishing incident response capabilities and handling incidents efficiently and effectively.
A behavior-based malware detection system for Android platforms that uses crowdsourcing to detect anomalies and malware in applications.
A comprehensive guide to hardening OpenLDAP on Linux using AppArmor and systemd, providing a defense in depth approach to securing LDAP deployments.
A Microsoft framework for secure and efficient sharing of cybersecurity information between trusted parties to reduce cybersecurity risks.
PINNED

Mandos
Fractional CISO service that helps B2B companies implement security leadership to win enterprise deals, achieve compliance, and develop strategic security programs.

Checkmarx SCA
A software composition analysis tool that identifies vulnerabilities, malicious code, and license risks in open source dependencies throughout the software development lifecycle.

Orca Security
A cloud-native application protection platform that provides agentless security monitoring, vulnerability management, and compliance capabilities across multi-cloud environments.

DryRun
A GitHub application that performs automated security code reviews by analyzing contextual security aspects of code changes during pull requests.