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When Lin Hong heard that his opponent had a master from Mizuki University, he was not only not worried, but was very happy. Pen ~ fun ~ pavilion www.biquge.info

This shows that this exercise will become interesting.

If the other party doesn't have a little level, and casually puts the whole down, that's the most boring.

As a university in China that is currently at the forefront of research in the field of computer science, the teachers in it are naturally at some level, and even some undergraduates and graduate students are also very good in technology, and compared with some halfway monks, they are more professional and have a more solid foundation.

In the midst of everyone's busyness, the exercise has begun unconsciously.

There were no exciting scenes, no uplifting slogans, and a war without gunpowder began in silence.

Since Lin Hong was using his own computer, Captain Qian also came over to see it once, and later saw that he had never seen the system inside, except for some surprise, he didn't say anything.

This exercise only stipulates the scope of the server system, but it does not say that the operating system for personal use should also belong to these three categories.

When everyone else was busy, I checked the router used in the computer room, which is Cisco, an international brand that has been producing routers since the eighties.

The system inside the router is a firmware system, the function is simple and specific, basically there is no vulnerability, as long as it is properly set.

However, for masters, as long as there is enough technology and tools, the system inside the router can also make a fuss.

The system inside the router is actually an embedded operating system, which completes specific hardware specific functions.

The system above the Cisco router is Cisco IOS, which stands for InterworkoperatingSystem, which literally. Directly is the "Internet operating system". This Internet operating system is worthy of its name, because its main function is to serve the device to access the Internet.

This system was developed by Kirk, one of the founders of Cisco? Written by Lougheed. It was born as early as 1986, and has launched many upgraded versions so far, and this information can be seen directly in the router's web settings interface, and can also be viewed by logging in to the iOS system through TEL and using the display command.

The more complex the system, the more vulnerabilities it can be exploited by hackers.

The reason why Cisco often makes maintenance upgrades to iOS. In addition to adding new features, another important reason is that new vulnerabilities are constantly being discovered and they have to be upgraded and maintained.

Lin Hong connected his computer to the LAN, then checked his gateway IP, directly entered the address of this IP into the browser, and entered, and a login interface appeared in the monitor, prompting to enter the user name and password.

Basically. In the system of each router, http web services are opened, and a setting interface similar to a website is integrated in it. You can set up your router directly from your browser.

This program is integrated into the firmware, and the password and user name are basically the same, if not modified, it is basically a common password and user name similar to Cisco or Admin.

Lin Hong directly entered the two default passwords and found that they had been modified, but he did not make the low-level mistake that he had not even changed the default password of the router.

Seeing that Captain Qian happened to be passing by his side, Lin Hong asked casually, "Captain Qian, what is the password of this router?" I'll go in and set it up. ”

Captain Qian hurriedly asked another soldier, but the other party was not very sure, and said a few passwords. Lin Hong tried it one after another, but the results were incorrect.

"Who set this password?" Captain Qian was a little annoyed.

The soldier said, "Captain, this router has been around for a long time. There have been several administrators in the past, and I don't know who changed them. ”

Captain Qian listened. I can't help but feel a little helpless.

Unexpectedly, this kind of thing happened at the beginning of the exercise. When they bought the equipment before, they only missed this, mainly because this thing was inconspicuous, and the previous one could still be used, so no one thought of this.

There are many interfaces in this router, and you won't be able to find the same specifications in the base for a while and a half, and this is a military base, so if you want to buy a new one, you have to go to the city dozens of kilometers away to buy it.

The router is a very important device, and Captain Qian also knows this, if you don't set up the security properly, it is very likely to be used by the other party.

"I'm going to have people buy new ones right away." Captain Qian said.

Lin Hong looked at the router, then shook his head and said, "No need, I'll reset the password." ”

Captain Qian was slightly stunned: "Reset the password?" ”

He had no idea that he could reset his password if he forgot it.

Lin Hong explained: "Routers generally have a password reset function in order to deal with the situation that you forget your password. Cisco's router, the reset process is more complicated, and most people don't know about it. ”

Lin Hong wants to reset the password of the router...... Under the propaganda of that soldier, many people put down what they were doing and ran to the side to watch.

After Lin Hong connected his laptop and router, he called up the simulation terminal interface in the system. Soon a connection was established to the system services in the router.

He first entered a command with a real-world version number, and then recorded the value in the real-world register.

Once you've done that, turn off the power supply and reboot the router.

At the moment when the router restarted, he quickly pressed the break key on the keyboard, only to see that the command prompt appeared on the terminal interface again.

Under this command prompt, Lin Hong skillfully entered a number of commands, and the system feedback information in it to interact with the settings, after these complicated settings were done, he pressed Ctrl+Z to save and exit, and finally restarted the router again.

Finally, Lin Hong accessed it again through the browser, entered the default password of Cisco, and logged in smoothly.

Everyone was dumbfounded by his series of actions, and they only thought he was very powerful.

Lin Hong didn't feel anything about this, and explained to everyone that this is just a specific step for Cisco to reset the password, just remember it, there is no technical content.

That said, there are very few people who know about it, and they are basically not professionals, so they have no access to this aspect of the content. At this point, they were once again compared to Lin Hong.

Lao Wang was also quite surprised by Lin Hong's extensive involvement. He had never been exposed to this kind of knowledge details, and he couldn't help but be curious about Lin Hong's identity. (To be continued.) If you like this work, you are welcome to come to the starting point to vote for recommendation and monthly passes, and your support is my biggest motivation. )