Home • Router Encyclopedia - Page 2
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双重NAT是什么意思？端口转发白配、联机NAT3、远程走中继，祸根多半是它
家里WiFi一切正常，人出门就是连不进来？先看看你是不是被两层NAT叠着管。光猫路由模式叠一层、运营商CGNAT再叠一层、房东网络还能叠一层。两步判断中没中招，解法按来路挑，这篇一次讲清。...
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WiFi连上了却提示无法上网？手机靠偷偷访问一个网址来判断，我把苹果小米华为的探针挨个试了
在商场连WiFi，登录页自己弹出来，谁通知手机的？我实测了苹果、小米、华为、Windows的网络探针地址，204、302、超时三种回话决定了手机提示有网、要登录还是无法上网，误报的自救办法也一并说清。...
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What do HTTP proxy and SOCKS5 mean? When you turn off the accelerator, the webpage spins everywhere, but WeChat works fine—90% of the time it's because the system proxy hasn't been restored
After turning off the game accelerator on my niece's laptop, the browser spins in circles, and WeChat videos don't interfere at all. Only after flipping to the bottom of the error page in small print did I see the real culprit: the system proxy hasn't been restored. The difference between HTTP proxies and SOCKS5, who is secretly changing your settings, and clearing the remaining three-layer sequence—explained all in one go....
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Why is remote access sometimes connected directly and sometimes relayed? The speed is ten times faster. I drew a diagram of the NAT hole drilling principle
The same NAS, company WiFi file transfer is 500KB/s, but phone data keeps upstream—the difference isn't speed, it's the road. Whether NAT holes work or not determines whether you go direct or relay. I break down the entire process and explain it clearly, including the speed boost order....
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Why is broadband only 50 Mbps upstream at 1000 Mbps downstream? The rules were set in the era of telephone lines, and fiber optic fibers hadn't changed either
When I connected to my home NAS and ran movies out of town, the speed was stuck at 5MB/s. I checked all the network cables and routers and found nothing wrong. Finally, I found the truth in the service hall app: the home bandwidth uplink is only 50MB. Upstream and downstream asymmetry isn't a scam. From ADSL to fiber optic rules, the rules have never changed. This article clearly explains the three main reasons and key points for uplink paths....
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What does NFC mean? If your bus card has no battery, where does the power come from? Bumping your phone into the router and connecting to WiFi are the same trick
During the morning rush hour, I was suddenly stuck by a question when using a bus card: If the card has no battery, where does the electricity come from? After looking through it, I realized that NFC is a card reader that supplies power to the card through the air. Touching a router with a phone to connect WiFi, simulating access cards, or touching QuickPass all follow this principle, and the truth behind access card simulation failure is also here....
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The phone never misses time; does the router reset to zero as soon as the power goes out? What's going on with NTP Sync Times? I sent a package to take a look
My mom's router is scheduled to shut down at midnight and doesn't run at night. The root cause is the system time resets to zero. I did some research and found out: phones rely on base stations to send time, computers rely on motherboard batteries, routers don't have anything but rely entirely on NTP. I sent a 48-byte packet using Python to see how the timing issue actually worked....
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Where should you start investigating a problem with your home network? I searched from the network cable to the webpage in the order of the five levels, and the reverse order took me three more days to mess around
During the week the study computer switched on and off, I switched DNS and cleared the cache for three days before finally squatting down to see the crystal connector had loosened. Since then, I have always searched from the bottom up: cable, address number, leaving the neighborhood, sending emails, and opening letters—five checkpoints. Each checkpoint is the fastest verification method, and ping the gateway can cut off half the suspicion....
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Bluetooth and WiFi are both crowded at 2.4G, so why don't they usually compete? As soon as you turn on the microwave, the filling is exposed
I wore my Bluetooth headphones into the kitchen to heat food, but as soon as the stove turned on, the headphones would crack and fall off, and the stove would shut down on its own. After checking, I realized that microwaves, WiFi, Bluetooth, and Zigbee are all squeezed into the 83.5MHz wide 2.4G band. Bluetooth survives by moving 1,600 times per second, and frequency hopping was invented by a Hollywood actress....
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What does WebSocket mean? The webpage doesn't refresh and the temperature jumps automatically. I caught a packet, and after shaking hands with this cable, it never hung up again
opened the Home Assistant page on my phone, and the living room temperature jumped from 26.4°C to 26.5°C, and I didn't touch the screen. Why should the webpage move on its own? I set up the smallest WebSocket service on my computer, using the most basic socket to handle and break down the frame and walk through it. I finally understood this line that refused to hang up. ...
