如何判斷被DDoS攻擊？

1、服務器CPU被大量佔用

DDoS攻擊其實是一種惡意性的資源佔用攻擊，攻擊者利用肉雞或者攻擊軟件對目標服務器發送大量的無效請求，導致服務器的資源被大量的佔用，因而正常的進程沒有得到有效的處理，這樣網站就會出現打開緩慢的情況。如果服務器某段時期能突然出現CPU佔用率過高，那麼就可能是網站受到CC攻擊影響。

2、帶寬被大量佔用

佔用帶寬資源通常是DDoS攻擊的一種主要手段，畢竟對很多小型企業或者個人網站來說，帶寬的資源可以說非常有限，網絡的帶寬被大量無效數據給佔據時，正常流量數據請求很難被服務器進行處理。如果服務器上行帶寬佔用率達到90%以上時，那麼你的網站通常出現被DDoS攻擊的可能。

3、服務器連接不到，網站也打不開

如果網站服務器被大量DDoS攻擊時，有可能會造成服務器藍屏或者死機，這時就意味着服務器已經連接不上了，網站出現連接錯誤的情況。當然出現這種請求時我們最好是確認一下服務器是否是硬件故障等所導致出現的問題，否者在進行服務器連接時就要做好相關的防禦首段。

4、域名ping不出IP

遇到域名ping不出IP這種情況，站長們可能會比較少考慮到，其實這也是DDoS攻擊的一種表現，只是攻擊着所針對的攻擊目標是網站的DNS域名服務器。在出現這種攻擊時，ping服務器的IP是正常聯通的，但是網站就是不能正常打開，並且在ping域名時會出現無法正常ping通的情況。

Is Your Website Playing Hard to Get? It Might Be a DDoS Attack!

Ever tried accessing a website only to find it's moving slower than a snail on a leisurely stroll? Or worse, it just refuses to load, like it's giving you the cold shoulder? Well, your website might not just be playing hard to get—it could be under a DDoS attack! But fear not, dear reader, for we have the digital detective kit to help you spot the signs of such nefarious activities.

1. The Overworked CPU: A Telltale Heart

Imagine your server's CPU as an overcaffeinated office worker, juggling tasks faster than you can say "deadline." Now, imagine if a horde of extra "tasks" (read: bogus requests) bombarded our frazzled friend, courtesy of a DDoS attack. The result? A server so busy it can barely keep up, leaving your website to open at the pace of a glacier in no hurry. A sudden spike in CPU usage? That's your cue to suspect something's afoot.

2. Bandwidth Bloat: The Traffic Jam

Next up is the bandwidth, the highway of the internet. Now, picture a DDoS attack as a flash mob deciding to have a dance-off right there on the freeway, blocking all the lanes. Real traffic's stuck in a jam, and your website's data requests can't squeeze through. If your server's bandwidth usage dashboard is screaming red with over 90% occupancy, you might be hosting an unwanted digital dance-off.

3. Connection Who? When Your Website Gives You the Silent Treatment

Sometimes, a DDoS attack is like throwing so many pies at a server that it just... gives up. Crashes, freezes, goes on an unplanned vacation. If your website is suddenly as unreachable as a hermit on a mountaintop, it's time to play detective. Could it be a simple hardware hiccup, or is it defense time against a cyber onslaught?

4. The Mysterious Case of the Missing IP

Here's a lesser-known plot twist: your website's domain name turning into a ghost, unable to ping its IP address back to the digital world. It's like sending a letter to a friend only to have it vanish into thin air. This spectral phenomenon might be a sign that a DDoS attack is haunting your website's DNS server, disrupting the normal flow of internet traffic to your digital doorstep.

In Conclusion:

Spotting a DDoS attack early is like catching a gremlin before it multiplies – crucial and a tad dramatic. Keep an eye on these digital vital signs, and you might just save your website from becoming a cyber ghost town. Remember, in the world of web security, being a bit of a detective doesn't just pay off—it's essential. So, grab your digital magnifying glass, and let's keep the internet safe, one website at a time!