if ($http_user_agent ~ "yandex|baidu|spider|mj12|blex|webmeup|ichiro|moget|
naverbot|sogou|youdao|majestic|copyscape|sitesnagger|teleportpro|copier|
reaper|stripper|webzip|peek|scrape|grub|linkdex|zyborg|zibber|bullseye|
blowfish|backdoor|spyder|download|demon|linklooker|emailcollector|emailsiphon|
emailwolf|creep|getright|suck|ninja|ahrefsBot|semrush|petalbot|dataforseobot|
semrush|dotbot|meta|OAI-SearchBot|ChatGPT|GPTBot|Claude|anthropic|CCBot|
cohere-ai|ImagesiftBot|Perplexity|Omigili|CrowdTanglebot|LinkisBot|
TweetmemeBot|LivelapBot|Openbot|Snooper|aiHitBot|Huaweisymantecspider") { return 444; }