The ACK flood attack is defended by the load check. The principle is that the cleaning device checks the payload of the ACK packet. If the payloads are all consistent (if the payload content is all 1), the packet is discarded.
In the IKE V1 pre-shared key mode, what is the main role of the data captured in the following figure?
Regarding the Radius authentication process, there are the following steps: 1. The Radius client (network access server) in the network device receives the username and password, and sends an authentication request to the Radius server; 2 the user logs in to the USG access server, etc. When the network device sends the username and password to the network access server; 3. After receiving the legitimate request, the Radius server completes the authentication and returns the required user authorization information to the client. What is the correct order?
A user wants to limit the maximum bandwidth of the 192.168.1.0/24 network segment to 500M, and limit all IP addresses in the network segment to maintain a bandwidth of 1M. How should I configure a current limiting policy for this requirement?
What type of message is the VRRP hello message?
When using the SSL VPN client to start the network extension, the prompt "Connection gateway failed", what are the possible reasons for the failure?
What actions will be performed when the firewall hot standby sends the active/standby switchover?
The malformed packet attack technology uses some legitimate packets to perform reconnaissance or data detection on the network. These packets are legal application types, but only normal network packets are rarely used.
What are the possible reasons why the firewall 2 IPSec VPN cannot be established successfully?
In the application scenario of IPSec traversal by NAT, the active initiator of the firewall must configure NAT traversal, and the firewall at the other end can be configured without NAT traversal.
