Yesterday, we introduced some basic concepts of the S S H service, as well as some conventional configurations. These are some of its most basic things, and then we added this conventional configuration. This is very important, but it was removed by me before. Today, we will consider it, or add it again, first say, This is the prohibition of reverse parsing. First, we find this item. We open the configuration file of this service, open its configuration file, and then we search for your introverted "naive" dns. You can search for this dns. At that time, d, ah, and then he is in the 115 lines, 115 lines. But what about my configuration file, It has been changed by me. Well, what is the default setting? Let me figure it out. You can open your configuration file to see if the default setting is like this, Yes, if the default value is yes, then it is suggested that we must change this item to no, as I do, copy it again, and then remove the pound sign, change yes to no, and change to no, which means not to use d n s, right? Its actual meaning is easy to understand, grapefruit e n s
Suitable for people
People who are interested in security technology, and participants in various security and operation and maintenance competitions.
You will learn
This article introduces how to configure and manage SSH services from the perspective of security and operation and maintenance.
Course Introduction
This course introduces how to configure and manage SSH services from the security and operation and maintenance levels. The theory of the whole course is combined with the practice, so that the students can know both the reason and the reason.
The original course was recorded in 2018, and the course content was significantly adjusted in 2022. The main course content after adjustment is as follows:
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