sweetmeat

Although Feng Zining's schoolguy account has been canceled and the content has been emptied, the time of cancellation remains on the blank homepage.Qin Xiaofeng noticed that the account was canceled around [-] o'clock in the evening the previous day. He returned to his homepage, clicked on "Recent Visitors", and found that two "logged out" accounts had visited the homepage the night before.

He followed one of the dots, and compared the logout time to confirm that it was indeed Feng Zining's account, that is to say, Feng Zining had browsed his homepage before canceling the account.Qin Xiaofeng didn't find anything on his homepage that could irritate him, so much so that he wanted to delete his account.He looked at another "cancelled" account, and was shocked to find that it was an account that was canceled five years ago.

How can an account that was canceled five years ago log in and browse the schoolguy page recently?Tan Xiaofeng took a deep breath, and based on the login time of this "logged out" account, retroactively confirmed that the IP address of this visit was in Japan.He traced back through Feng Zining's homepage, and found that the IP address of Feng Zining's last login to schoolguy was in China.

Feng Zining has indeed returned to China, but where is this IP?Qin Xiaofeng conducted a further detailed search, and was shocked to learn that the IP address Feng Zining used to log out of his account was actually in the science and technology park, only three bus stops away from where Qin Xiaofeng was located.

Faced with such a result, Tan Xiaofeng was so shocked that he even forgot to eat the cup noodles.

He returned to the "Recent Visitors" interface, only to realize that there were "logged out" visitors every day.He checked the IP addresses of these visitors one by one, and found that the earliest logout time among them was eight years ago, and the IP addresses used by each of them when they logged out were completely different from the IP addresses used in the latest visit.

From this point of view, someone should have obtained the accounts of these people and then logged in to the website through the virtual address.Although the account has been canceled, the registered information and published content remain in the huge server. Once activated by someone with ulterior motives, although the information of the original account may not be restored, it can still be used for browsing.

It is really troublesome to have to activate a different "logged out" account every time you browse the website.However, all logical behaviors can be repeated infinitely through the computer, as long as the behaviors are written into instructions and software, grab an account that no one cares about and use the virtual IP to log in to the website, Tan Xiaofeng knows, this is for Feng Zining very simple.

So, among the IP addresses used by so many "deleted" accounts, which one is the real one?

First of all, if Feng Zining wants to cancel his account, he must "honestly" log in to the website with his own account, so his IP address should be related to the address at the time of cancellation.Secondly, if Feng Zining really uses the software that randomly captures accounts to log in every day, for convenience, he should write the two steps of capturing accounts and setting virtual IP together.Then, when Feng Zining logged out his account, since he didn't use any software to randomly capture accounts, he probably didn't set up a virtual IP.

Qin Xiaofeng stared at the IP address of Feng Zining's last log-in to schoolguy, and tapped lightly on the keyboard with his fingers, judging that Feng Zining most likely logged in on a terminal in the science and technology park around eleven o'clock the night before. schoolguy.

At this point in time, even if there is no rest, ordinary people should stay in the house and not go out.What's more, Feng Zining has to maintain adequate sleep every day, and it is even more impossible to be outside.The location of this terminal is probably Feng Zining's residence.Tan Xiaofeng always thought that Feng Zining was still abroad, but unexpectedly, he was so close to him.The distance between the two of them is as close as half an hour's bicycle ride, but where is Feng Zining in the science and technology park?

Qin Xiaofeng picked up the fully soaked cup noodles and ate them with the soup that was not too hot. While eating, he thought about how to determine the location of the terminal. At least, he had to be [-]% sure that Feng Zining was really in the science and technology park.

He was eating noodles, and suddenly saw that the icon of the chat software changed to a flickering avatar. When he clicked on it, it was Ricardo.

After a whole day, Ricardo asked concerned: How is it?Any news?I left him a message and he didn't reply.

Qin Xiaofeng put down the leftover cup noodles and replied: Well, I can find him soon.Thanks.

Ricardo: That’s good, let’s talk about it when you find it.

Qin Xiaofeng: Good.

After eating the cup noodles, Qin Xiaofeng cleaned up the table.He stood in front of the water dispenser drinking water, thinking about what to do next.

After drinking the water, he returned to the computer.

The "Recently Visited" column is set in the most inconspicuous corner in the lower right corner of the homepage, and only displays the most recent three people who have visited the homepage each time.Usually, Qin Xiaofeng never pays attention to this column, let alone enter the "Recent Visitor" interface by clicking the extension item, and check the list of the last [-] visitors kept by the system.

Now, Tan Xiaofeng clicked into this interface and saw all kinds of "logged out" appearing almost every day, so he couldn't help frowning.If these "cancelled" accounts were all random accounts grabbed by Feng Zining, then at least in the last two weeks, Feng Zining would browse his homepage every day.

Tan Xiaofeng thought that as early as a year ago, Feng Zining had cut off the contact between the two through unilateral non-response, but it was only then that he learned that Feng Zining might have been secretly watching his life every day for the past year, And the night before, for unknown reasons, I suddenly canceled my account.

However, the existing information shows that even though Feng Zining had already canceled his account, he still browsed Tan Xiaofeng's homepage through other "deleted" accounts five hours after canceling his account.Facing such a fact, Tan Xiaofeng took a deep breath slowly, and his originally clear thinking appeared a little disordered - he couldn't find any logic.

Why do you never look at this column?Tan Xiaofeng couldn't help regretting that if he had discovered this "logged out" earlier, he might have discovered that Feng Zining had been silently paying attention to him earlier.Although Tan Xiaofeng still couldn't figure out why Feng Zining paid attention to him in such a way, Tan Xiaofeng thought, if he could find out about this earlier, then maybe such things as canceling his real account and blocking him would not have happened.

What was Feng Zining thinking about this year?In other words, since the beginning of August last year, what happened to Feng Zining, what happened, and what was he thinking?

Returning to the questions that Tan Xiaofeng couldn't answer, he decided to still start with these "deleted" accounts.

By analyzing the online time of these accounts, the online time of "logged out" after each login is between 10 minutes and half an hour.The virtual IP is just a logical address, and any data transmission has to go through the real network interface, which cannot be modified, so you only need to trace back during the "logged out" online period to confirm the location of the IP.

However, such behavior has undoubtedly violated privacy, and security is more likely to be involved in the traceability process, which is a violation of the law.Qin Xiaofeng is of course confident that he will not be discovered during the search through the security system, but this is not advisable.

How to do?

Qin Xiaofeng crossed his fingers, thinking about the computer screen, and finally decided to confirm the location of the IP first.He took off his watch and put it aside, opened the software writing tool, and started writing code.

While typing on the keyboard, Qin Xiaofeng caught a glimpse of a beige circle on his left wrist.That is the original skin color left by wearing a watch on the wrist when the surrounding skin is tanned after summer.Looking at the white circle, Tan Xiaofeng suddenly remembered that one day when he was in college, Feng Zining pointed at his wrist with a disgusted tone.

Earlier that day, they agreed to have dinner and a movie together.Feng Zining didn't have any lessons beforehand, so she went to her cousin's house to give the little girl extra lessons.His watch was sent for repair, and the little girl drew a watch on his wrist while he was asleep.

When Tan Xiaofeng saw him later, he intentionally made fun of him and asked, "What time is it?"

Out of habit, Feng Zining raised his hand to look at his watch.When he realized why Tan Xiaofeng asked such a question, he gave Qin Xiaofeng a look and explained, "My cousin drew it while I was sleeping."

"Is that still drawn at [-]:[-]?" He bent down, took a closer look, and said with a smile.

Feng Zining shrugged helplessly, took the bicycle, put it in the same direction as Qin Xiaofeng's car, and complained, "Hurry up, I don't have time to wash it off. It's so ugly."

After listening, Tan Xiaofeng took off his watch, handed it to him, and said, "Put mine on and cover it up."

Feng Zining blinked, and happily took the watch and put it on. The dial and strap just covered the traces drawn with the ballpoint pen.Soon, he caught sight of the white circle on Tan Xiaofeng's wrist. The traces of the watch formed a perfect color difference with the surrounding skin. Pointing at the white circle, he said with disgust, "Tsk tsk tsk, let you put on sunscreen?!"

Tan Xiaofeng looked at it, and said nonchalantly, "Is there any reason why summer isn't dark?" After he finished speaking, he rode the bike forward, but Feng Zining grabbed his schoolbag. "What are you doing?" He put one leg down and asked puzzledly.

Feng Zining chuckled, rode to his side and stopped, took out a ballpoint pen from his schoolbag, pulled up his left hand and said, "I will pay you a watch."

"Huh?" Qin Xiaofeng didn't know whether to laugh or cry.I saw Feng Zining biting the cap of the pen with her teeth, drawing a watch stroke by stroke along the circle of untanned skin that was left on Tan Xiaofeng's wrist.Tan Xiaofeng was speechless for a while, and said, "Isn't this crazy!"

Feng Zining raised his eyebrows, not paying attention.When drawing the minute, he still doesn't forget to compare the time on his wrist watch. "It's done!" He put the cap on the pen and threw the pen back into the bag.

Tan Xiaofeng gave him an unbearable look, and rode forward.

After a while, Feng Zining followed and asked, "Hey, what time is it?"

"Five forty-three." After he finished speaking, he released his left hand and glanced at the watch on his wrist.

Feng Zining was speechless in surprise, quickly raised his hand to check the time, and said in surprise, "Why are you so accurate?!"

"I won't tell you." Tan Xiaofeng said with a smile, and saw Feng Zining's eyes widen, reaching out to pull his schoolbag.This was completely expected by Tan Xiaofeng, he speeded up and dodged.

It wasn't until one o'clock in the morning that Qin Xiaofeng finally tried running the software he had just finished on this machine.He made relevant configurations, connected to the network, and waited for the rabbit.As long as the "logged out" visits his schoolguy homepage, the software will record the address of the other party, which is convenient for Tan Xiaofeng to trace the physical address.

Sit back and wait for the rabbit.

This idiom reminded Tan Xiaofeng before going to bed that he and Feng Zining made an appointment to go out to play again.It was Saturday, and Qin Xiaofeng slept very late because he was rushing to make a PPT the night before.He also got up late, and after waking up, he saw the message from Feng Zining, and the two confirmed a time to meet.

Feng Zining: I'm having breakfast in the cafeteria, so I'll bring it for you.You packed up and waited for me downstairs.

Tan Xiaofeng: Okay, then I'll wait downstairs.

As agreed, Tan Xiaofeng finished washing and went out refreshed.He stood downstairs in the dormitory waiting for Feng Zining, not sure which cafeteria Feng Zining would come out from.After waiting for about ten minutes, Tan Xiaofeng saw Feng Zining coming out of the No. [-] canteen with breakfast, ran up to him, and bumped him on the shoulder without saying a word.

Qin Xiaofeng was taken aback, quickly covered his forehead, and asked, "What are you doing?"

Feng Zining handed him the breakfast and said with a smile, "I hit a tree stump."

Hearing this, Tan Xiaofeng was stunned, smiled and shook his head.