AhrefsBot/6.1
UA string: Mozilla/5.0 (compatible; AhrefsBot/6.1; +http://ahrefs.com/robot/)
Website: ahrefs.com/robot/
Unwanted: serves commercial clients.
Note to errant botmeisters: bots that observe the robots.txt standard should not crawl sites where the file contains a 'deny all' setting, unless there is a prior 'allow' setting for that bot. A 'deny all' setting is consecutive lines 'User-agent: *' & 'Disallow: /'; an 'allow' setting is consecutive lines 'User-agent: Thatbot' & 'Disallow:'.
Webmasters are not required to individually block the myriad unwanted bots. RTFM!
Some bots are also unwanted, for the reason given; 'SetEnvIf User-Agent' rules return 'Not Allowed'.
Last Updated: 2020.06.05 - View As Text File
UA string: Mozilla/5.0 (compatible; AhrefsBot/6.1; +http://ahrefs.com/robot/)
Website: ahrefs.com/robot/
Unwanted: serves commercial clients.
UA string: Mozilla/5.0 (compatible; AlphaBot/3.2; +http://alphaseobot.com/bot.html)
Website: alphaseobot.com
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/600.2.5 (KHTML, like Gecko) Version/8.0.2 Safari/600.2.5 (Applebot/0.1; +http://www.apple.com/go/applebot)
Website: www.apple.com/go/applebot
Asks for robots.txt, but fails to observe it!
UA string: AwarioSmartBot/1.0 (+https://awario.com/bots.html; bots@awario.com)
Website: awario.com/bots.html
Doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: serves commercial clients.
UA string: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534+ (KHTML, like Gecko) BingPreview/1.0b
Website: None
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: Mozilla/5.0 (compatible; BLEXBot/1.0; +http://webmeup-crawler.com/)
Website: webmeup-crawler.com
FFS! Website is insecure, served over http!
Doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: serves commercial clients.
UA string: BorneoBot/0.7.1 (crawlcheck123@gmail.com)
Website: None
Asks for robots.txt, but fails to observe it!
UA string: Mozilla/5.0 (compatible; coccocbot-image/1.0; +http://help.coccoc.com/searchengine)
Website: http://help.coccoc.com/searchengine
Asks for robots.txt, but fails to observe it!
UA string: com.tinyspeck.chatlyio/20.04.20 (iPhone; iOS 13.4.1; Scale/3.00)
Website: None
Doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: 'Slack' app for iOS; serves commercial clients.
UA string: 'Mozilla/5.0 (compatible; DuckDuckBot-Https/1.1; https://duckduckgo.com/duckduckbot)'
Website: duckduckgo.com/duckduckbot
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: e.ventures Investment Crawler (eventures.vc)
Website: None.
Doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: presumably serves commercial clients.
UA string: GarlikCrawler/1.2 (http://garlik.com/, crawler@garlik.com)
Website: garlik.com
Doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: serves commercial clients.
UA string: https://gdnplus.com:Gather Analyze Provide.
Website: gdnplus.com
Doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: apparently serves commercial clients.
UA string: Mozilla/5.0 (compatible; Gluten Free Crawler/1.0; +http://glutenfreepleasure.com/)
Website: glutenfreepleasure.com
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: Googlebot-Image/1.0
Website: None
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: HealthCheckBot/0.2
Website: None specified, though a search reveals pypi.org/project/healthcheckbot as probably relevant.
Doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: it seems to have no business crawling third-party sites.
UA string: HTTP Banner Detection (https://security.ipip.net)
Website: security.ipip.net
Website address appears invalid.
Doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: until it provides a valid website address!
UA string: HubSpot Links Crawler 2.0 http://www.hubspot.com/
Website: www.hubspot.com
Unwanted: serves commercial clients.
UA string: Mozilla/5.0 (compatible; hypestat/1.0; +https://hypestat.com/bot)
Website: hypestat.com/bot
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: Internet-structure-research-project-bot
Website: None
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: Mozilla/5.0 (iodc; odysseus 3352-131-011119113358-349; +https://iodc.co.uk)
Website: iodc.co.uk
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: Mozilla/5.0 (compatible; ips-agent)
Website: None
Apparently used by Verisign (who run the .com and .net domain name servers) to assess traffic on domains known by them to be expiring, using this data to help sell potentially valuable 'busy' domains to bulk buyers at other registrars.
Asks for robots.txt, but fails to observe it!
UA string: LightspeedSystemsCrawler Mozilla/5.0 (Windows; U; MSIE 9.0; Windows NT 9.0; en-US
Website: None
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: Mozilla/5.0 (compatible; linkdexbot/2.2; +http://www.linkdex.com/bots/)
Website: www.linkdex.com/bots
Asks for robots.txt, but fails to observe it!
UA string: Mozilla/5.0 (compatible; Linux x86_64; Mail.RU_Bot/Robots/2.0; +http://go.mail.ru/help/robots)
Website: go.mail.ru/help/robots
Asks for robots.txt, but fails to observe it!
UA string: masscan 1.0 (http:www)
Website: None
Doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: until it provides a valid website address!
UA string: masscan/1.0 (https://github.com/robertdavidgraham/masscan)
Website: github.com/robertdavidgraham/masscan
Doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: promiscuous port scanner, more likely used for harm than good.
UA string: 5.9.98.178 Mozilla/5.0 (compatible; MegaIndex.ru/2.0; +http://megaindex.com/crawler)
Website: megaindex.com/crawler
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: Mozilla/5.0 (compatible; MJ12bot/v1.4.8; http://mj12bot.com/)
Website: mj12bot.com
Unwanted: serves commercial clients, for marketing purposes.
UA string: msnbot/2.0b (+http://search.msn.com/msnbot.htm)
Website: search.msn.com/msnbot.htm
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: Mozilla/5.0 (compatible; NetcraftSurveyAgent/1.0; +info@netcraft.com)
Website: netcraft.com
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: netEstate NE Crawler (+http://www.website-datenbank.de/)
Website: www.website-datenbank.de/
Asks for robots.txt, but fails to observe it!
UA string: NetSystemsResearch studies the availability of various services across the internet. Our website is netsystemsresearch.com
Website: netsystemsresearch.com
FFS! Website is insecure, served over http! Oh, the irony, for a 'security research organisation'!
Doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: until they start serving their website over https!
UA string: Mozilla/5.0 (compatible; Nimbostratus-Bot/v1.3.2; http://cloudsystemnetworks.com)
Website: cloudsystemnetworks.com
FFS! Website is insecure, served over http!
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: Mozilla/5.0 (compatible; nsrbot/1.0; +http://netsystemsresearch.com)
Website: netsystemsresearch.com
FFS! Website is insecure, served over http!
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: Mozilla/5.0 (compatible; oBot/2.3.1; http://filterdb.iss.net/crawler/)
Website: filterdb.iss.net/crawler
FFS! Website is insecure, served over http!
Asks for robots.txt, but fails to observe it!
UA string: Mozilla/5.0 (Linux; Android 7.0;) AppleWebKit/537.36 (KHTML, like Gecko) Mobile Safari/537.36 (compatible; PetalBot;+https://aspiegel.com/petalbot)
Website: aspiegel.com/petalbot
Asks for robots.txt, but never goes further, even when allowed.
Unwanted: clearly so poorly coded that it isn't doing its ostensible job, but cluttering up server logs.
UA string: Mozilla/5.0 (compatible; Plukkie/1.6; http://www.botje.com/plukkie.htm)
Website: www.botje.com/plukkie.htm
FFS! Website is insecure, served over http!
Asks for robots.txt, but fails to observe it!
UA string: www.probethenet.com scanner
Website: www.probethenet.com
FFS! Website is insecure, served over http!
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: Riddler (http://riddler.io/about)
Website: riddler.io/about
Asks for robots.txt, but fails to observe it!
UA string: SafeDNSBot (https://www.safedns.com/searchbot)
Website: www.safedns.com/searchbot
Asks for robots.txt, but fails to observe it!
UA string: Mozilla/5.0 (compatible; Seekport Crawler; http://seekport.com/
Website: seekport.com
FFS! Website is insecure, served over http!
Asks for robots.txt, but fails to observe it!
UA string: Mozilla/5.0 (compatible) SemanticScholarBot (+https://www.semanticscholar.org/crawler)
Website: www.semanticscholar.org/crawler
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: SEMrushBot
Website: None.
Doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: assumed to serve commercial clients.
UA string: Mozilla/5.0 (compatible; SemrushBot-BA; +http://www.semrush.com/bot.html)
Website: www.semrush.com/bot.html
Doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: serves commercial clients.
UA string: Mozilla/5.0 (compatible; SemrushBot/1.0~bm; +http://www.semrush.com/bot.html)
Website: www.semrush.com/bot.html
Doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: serves commercial clients.
UA string: Mozilla/5.0 (compatible; SemrushBot/6~bl; +http://www.semrush.com/bot.html)
Website: www.semrush.com/bot.html
Asks for robots.txt, but fails to observe it!
Unwanted: serves commercial clients.
UA string: Mozilla/5.0 (compatible; adscanner/)/1.1 (http://seocompany.store; spider@seocompany.store)
Website: seocompany.store
FFS! Website is insecure, served over http! Address also appears invalid.
Unwanted: observes robots.txt standard, but serves commercial clients.
UA string: Mozilla/5.0 (compatible; SEOkicks-Robot; +http://www.seokicks.de/robot.html)
Website: www.seokicks.de/robot.html
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: serpstatbot/1.0 (advanced backlink tracking bot; curl/7.58.0; http://serpstatbot.com/; abuse@serpstatbot.com)
Website: serpstatbot.com
Unwanted: serves commercial clients.
UA string: Slack-ImgProxy (+https://api.slack.com/robots)
Website: api.slack.com/robots
Explicitly doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: serves commercial clients.
UA string: Slackbot 1.0 (+https://api.slack.com/robots)
Website: api.slack.com/robots
Explicitly doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: serves commercial clients.
UA string: Slackbot-LinkExpanding 1.0 (+https://api.slack.com/robots)
Website: api.slack.com/robots
Explicitly doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: serves commercial clients.
UA string: Sogou web spider/4.0(+http://www.sogou.com/docs/help/webmasters.htm#07)
Website: www.sogou.com/docs/help/webmasters.htm#07
FFS! Website is insecure, served over http! Address also appears invalid.
Suddenly started asking for robots.txt, and appears to be observing it!
Will not be added to robots.txt until it cleans up its act, and provides a valid https address for more info.
UA string: Mozilla/5.0 (compatible; startmebot/1.0; +https://start.me/bot)
Website: start.me/bot
Explicitly doesn't ask for robots.txt, so can't possibly observe it!
UA string: Mozilla/5.0 (compatible; SurdotlyBot/1.0; +http://sur.ly/bot.html
Website: sur.ly/bot.html
FFS! Website is insecure, served over http!
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: TelegramBot (like TwitterBot)
Website: None.
Doesn't ask for robots.txt, so can't possibly observe it! (So, not like Twitterbot/1.0!)
Unwanted: until it provides a valid website address!
UA string: TprAdsTxtCrawler/1.0
Website: None
Started appearing in my server logs 19.04.2020, with HEAD request for 'ads.txt'.
Doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: until it provides a source of information about itself.
UA string: Mozilla/5.0 (compatible; TrendsmapResolver/0.1)
Website: None.
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: Mozilla/5.0 (TweetmemeBot/4.0; +http://datasift.com/bot.html) Gecko/20100101 Firefox/31.0
Website: datasift.com/bot.html
Explicitly doesn't ask for robots.txt, so can't possibly observe it!
Unwanted: serves commercial clients.
UA string: unfurlist (https://github.com/Doist/unfurlist)
Website: github.com/Doist/unfurlist
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: Mozilla/5.0 (compatible; XoviBot/2.0; +http://www.xovibot.net/
Website: www.xovibot.net/
FFS! Website is insecure, served over http!
Doesn't ask for robots.txt, so can't possibly observe it!
UA string: Mozilla/5.0 (compatible; Yahoo! Slurp; http://help.yahoo.com/help/us/ysearch/slurp)
Website: help.yahoo.com/help/us/ysearch/slurp
Doesn't ask for robots.txt, so can't possibly observe it!