![]() ![]() SSH Decryption is used to detect and decrypt incoming and outgoing SSH traffic. Security policies are accepted for traffic so that the firewall can block or allow traffic between the host on the public network and your internal server. For that reason, you need the previously mentioned certificates because the connection is formed directly between the host and the server. In this scenario, Palo Alto does not act as a proxy but directly forwards the request to the internal server. For this decryption, you must have a server private key and certificate. SSL Inbound Inspection decrypts traffic coming from external users to your internal services. If encryption is not enabled, Palo Alto cannot know what type of application is within the SSL connection. ![]() If SSL decryption is enabled, Palo Alto will easily distinguish within the policy whether Twitter traffic belongs to “reading,” “commenting,” or “chatting” and, based on that, defend or allow traffic. Still, you want to prohibit them from sending messages and posting content (tweeting). In this scenario, Palo Alto acts as an SSL Proxy that establishes a connection between your host and Palo Alto and separates (but logically related) communication between Palo Alto and the server on the Internet.Īn example in which this type of encryption is helpful is when you allow employees in your network to read the Twitter line in your policies in Palo Alto. SSL Forward Proxy decrypts SSL traffic between a host on your network and a server on the Internet. Types of decryption on Palo Alto Firewall The server uses its private key to decrypt the session key (from step 4).The client generates a random symmetric key and encrypts it using the server’s public key.The client checks the certificate by looking for it in the list of known certificates.The server responds to the request by sending its certificate containing its identity and public key. ![]()
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