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The firewall then intercepts the server response and forwards the response to the client, establishing an SSH tunnel between the firewall and the client and an SSH tunnel between the firewall and the server, with firewall functioning as a proxy. SSH decryption does not require any certificates, and the session-key used for inbound decryption is negotiated when the MiTM server received connection request from Original client, and MiTM client request connecting to Original server at once and negotiation another session-key for outbound decryption. When the client sends an SSH request to the server, the firewall intercepts the request and forwards the SSH request to the server. In an ssh-proxy configuration, the firewall resides between a client and a server. Ssh-proxy provides the capability for the firewall to decrypt inbound and outbound SSH connections passing through the firewall, in order to ensure that SSH is not being used to tunnel unwanted applications and content. Ssh-proxy is an intercepting (mitm) proxy server for security audits. Following our research we noticed that current available SSH decryption solutions are exposing organizations to MiTM attacks. To mitigate this threat, a few major security vendors recently published statements that they are mitigating malicious-SSH usage by creating a feature that enables the ability to intercept and decrypt SSH traffic. SSH represents a potential way to bypass security by creating connections the security device is not able to fully inspect. The main issue with blocking “malicious” SSH connections is that it’s close to impossible to tell the difference between malicious and non-malicious SSH connections without decrypting the traffic. SSH doesn’t have certificates that the Security Devices could compare against an Certificate Authority to authenticate the server.

SSH is a very common and is usually accepted by most security devices.SSH can be exploited for hacking in many ways: It’s very common for hackers to use SSH in order to stay under the radar of security products.