Is my site under attack? I cannot browse it any more!

[HKPhysicist]

Hello Developers,
These few days, my site is not accessible from my side any more.

• I checked its Nginx log which showed many:
  HTTP/1.1" 499 0 "-"

• Also, fail2ban is running but no IP is blocked. It used to have many IPs being blocked simultaneously.

• From the htop output, my site is flooded by so many visitors and overrun by them.

Is Nginx-bot-blocker still running effectively?
How do I correct this situation?

Yours faithfully :(

[HKPhysicist]

Hello Developers,
I begin to suspect this is a DDOS attack in the form of search robot. These are log in my web access log. All in the form of HTTP/1.1 499. Now, I can't even browse my website from my end :(

Note that there is an entry of Windows 98. Who would use this in year 2025? :(
`
103.13.193.240 - - [03/Nov/2025:17:11:07 +0800] "GET /category/electronics/accessories-supplies-for-electronics?l=46230&orderBy=date HTTP/1.1" 499 0 "-" "Opera/8.79.(Windows 98; lt-LT) Presto/2.9.174 Version/12.00"

49.151.178.115 - - [03/Nov/2025:17:11:07 +0800] "GET /category/electronics?distance=100&l=48303 HTTP/1.1" 499 0 "-" "Mozilla/5.0 (Macintosh; PPC Mac OS X 10_12_2 rv:2.0; tig-ER) AppleWebKit/535.38.5 (KHTML, like Gecko) Version/4.0.2 Safari/535.38.5"

113.21.228.126 - - [03/Nov/2025:17:11:07 +0800] "GET /search?c=62&distance=0&l=2&orderBy=distance&sc=68 HTTP/1.1" 499 0 "-" "Opera/9.49.(Windows NT 6.0; pl-PL) Presto/2.9.183 Version/10.00"

14.187.132.190 - - [03/Nov/2025:17:11:07 +0800] "GET /search?c=122&distance=400&l=34328&orderBy=date&sc=125 HTTP/1.1" 499 0 "-" "Mozilla/5.0 (Windows; U; Windows NT 6.2) AppleWebKit/531.6.4 (KHTML, like Gecko) Version/5.0.3 Safari/531.6.4"

112.200.77.89 - - [03/Nov/2025:17:11:08 +0800] "GET /search?c=122&distance=400&l=41787&sc=128 HTTP/1.1" 499 0 "-" "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/534.1 (KHTML, like Gecko) Chrome/17.0.890.0 Safari/534.1"

177.82.131.123 - - [03/Nov/2025:17:11:08 +0800] "GET /search?c=122&l=20272&orderBy=date&sc=130 HTTP/1.1" 499 0 "-" "Mozilla/5.0 (Windows NT 6.1; ber-DZ; rv:1.9.2.20) Gecko/9381-04-15 20:06:49.412109 Firefox/3.6.19"

187.122.71.183 - - [03/Nov/2025:17:11:08 +0800] "GET /search?c=14&distance=300&l=20115&orderBy=date&sc=29 HTTP/1.1" 499 0 "-" "Opera/9.43.(Windows NT 10.0; lg-UG) Presto/2.9.173 Version/11.00"

181.115.175.88 - - [03/Nov/2025:17:11:08 +0800] "GET /category/electronics?l=7&distance=300 HTTP/1.1" 499 0 "-" "Mozilla/5.0 (compatible; MSIE 7.0; Windows 95; Trident/5.0)"

14.254.182.189 - - [03/Nov/2025:17:11:08 +0800] "GET /search?c=97&distance=100&l=41243&orderBy=rating&sc=111 HTTP/1.1" 499 0 "-" "Opera/9.11.(Windows 95; nso-ZA) Presto/2.9.169 Version/11.00"

187.99.112.221 - - [03/Nov/2025:17:11:08 +0800] "GET /search?c=122&l=27167&orderBy=priceAsc&sc=125 HTTP/1.1" 499 0 "-" "Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 6.2; Trident/4.1)"

113.173.219.118 - - [03/Nov/2025:17:11:08 +0800] "GET /search?c=122&l=43949&orderBy=date&sc=127 HTTP/1.1" 499 0 "-" "Mozilla/5.0 (compatible; MSIE 9.0; Windows 95; Trident/4.1)"

201.50.224.48 - - [03/Nov/2025:17:11:08 +0800] "GET /search?l=41788&distance=500&orderBy=date&c=122&sc=130 HTTP/1.1" 499 0 "-" "Mozilla/5.0 (Windows NT 5.01; uk-UA; rv:1.9.0.20) Gecko/8164-10-01 00:01:29.428986 Firefox/3.6.18"

192.145.168.157 - - [03/Nov/2025:17:11:08 +0800] "GET /category/jobs/agriculture-environment?l=46805&orderBy=distance HTTP/1.1" 499 0 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:1.9.7.20) Gecko/3721-09-14 17:49:08.929596 Firefox/10.0"

105.161.74.21 - - [03/Nov/2025:17:11:08 +0800] "GET /search?c=114&distance=300&l=31638&sc=120 HTTP/1.1" 499 0 "-" "Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.1)"

14.237.157.197 - - [03/Nov/2025:17:11:08 +0800] "GET /search?c=97&l=46812&orderBy=priceAsc&sc=107 HTTP/1.1" 499 0 "-" "Opera/9.44.(Windows 98; Win 9x 4.90; zh-HK) Presto/2.9.164 Version/10.00"

45.167.205.137 - - [03/Nov/2025:17:11:09 +0800] "GET /search?c=62&l=40164&sc=70 HTTP/1.1" 504 176 "-" "Opera/9.42.(Windows NT 6.1; eo-US) Presto/2.9.188 Version/10.00"

178.170.183.18 - - [03/Nov/2025:17:11:09 +0800] "GET /search?c=14&distance=400&l=47848&orderBy=distance&sc=24 HTTP/1.1" 499 0 "-" "Mozilla/5.0 (Linux; Android 2.2.3) AppleWebKit/533.1 (KHTML, like Gecko) Chrome/34.0.842.0 Safari/533.1"

223.181.42.254 - - [03/Nov/2025:17:11:09 +0800] "GET /search?c=97&l=48311&orderBy=distance&sc=102 HTTP/1.1" 499 0 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/534.0 (KHTML, like Gecko) Chrome/35.0.831.0 Safari/534.0"

177.99.98.249 - - [03/Nov/2025:17:11:10 +0800] "GET /search?l=47579&orderBy=date&c=54 HTTP/1.1" 499 0 "-" "Opera/9.50.(Windows NT 6.2; ne-NP) Presto/2.9.160 Version/12.00"

14.235.239.110 - - [03/Nov/2025:17:11:10 +0800] "GET /search?c=9&l=41403&orderBy=priceAsc&sc=11 HTTP/1.1" 499 0 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/533.0 (KHTML, like Gecko) Chrome/23.0.826.0 Safari/533.0"
`