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Configuration Guide - Security

S7700 and S9700 V200R011C10

This document describes the configurations of Security, including ACL, reflective ACL, local attack defense, MFF, attack defense, traffic suppression and storm control, ARP security, port security, DHCP snooping, ND snooping, PPPoE+, IPSG, SAVI, URPF, keychain, separating the management plane from the service plane, security risks.
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Application in SSH

Application in SSH

On the network shown in Figure 17-10, an SSH client securely logs in to the web page of the SSH server and manages network devices on web. To improve security of SSH connections, the CA trusted by SSH client and server issues local certificates. The communicating parties verify the certificates of each other, and set up an SSH connection only when the certificate verification is successful. This avoids potential attacks.

Figure 17-10  PKI application in SSH

The SSH client and server make the following interaction during SSL connection setup:

  1. The client and server apply for local certificates from the PKI authentication center.
  2. The PKI authentication center issues local certificates to the client and server.
  3. The client sends an SSH connection request to the server and sends its own local certificate to the server.
  4. After verifying the local certificate from the client, the server sends an SSH connection request and its own local certificate to the client.
  5. After verifying the local certificate from the server, the client sends the verification result to the server. The SSH connection is set up.
Updated: 2019-10-18

Document ID: EDOC1000178319

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