Only googlebot,slurp and msnbot should crawl my site.

Please help!!
I need only google, yahoo and msn to crawl my site..
How can i do that?

 

You can try this robots.txt, but most spiders don't care about robots.txt anyways, so maybe it won't help much. And its not complete some spiders are maybe missing:

User-Agent: Teoma
User-Agent: Ask Jeeves
User-Agent: Jeeves
User-agent: Seekbot/1.0 
User-agent: seekbot
User-agent: EchO!/2.0
User-agent: echo!
User-agent: convera
User-agent: Convera Internet Spider V6.x
User-agent: ConveraCrawler/0.2
User-agent: ConveraCrawler/0.9d
User-agent: ConveraMultiMediaCrawler/0.1
User-Agent: Mozilla/2.0 (compatible; Ask Jeeves)  
User-agent: aipbot
User-agent: Aqua_Products 
User-agent: asterias 
User-agent: b2w/0.1 
User-agent: BackDoorBot/1.0 
User-agent: becomebot
User-agent: BlowFish/1.0 
User-agent: Bookmark search tool 
User-agent: BotALot 
User-agent: BotRightHere 
User-agent: BuiltBotTough 
User-agent: Bullseye/1.0 
User-agent: BunnySlippers 
User-agent: CheeseBot 
User-agent: CherryPicker 
User-agent: CherryPickerElite/1.0 
User-agent: CherryPickerSE/1.0 
User-agent: Copernic 
User-agent: CopyRightCheck 
User-agent: cosmos 
User-agent: Crescent 
User-agent: Crescent Internet ToolPak HTTP OLE Control v.1.0 
User-agent: Curl 
User-agent: DittoSpyder 
User-agent: EmailCollector 
User-agent: EmailSiphon 
User-agent: EmailWolf 
User-agent: EroCrawler 
User-agent: ExtractorPro 
User-agent: FairAd Client 
User-agent: Fasterfox
User-agent: Flaming AttackBot 
User-agent: Foobot 
User-agent: Gaisbot 
User-agent: GetRight/4.2 
User-agent: Harvest/1.5 
User-agent: hloader 
User-agent: httplib 
User-agent: HTTrack 3.0 
User-agent: humanlinks 
User-agent: IconSurf
User-agent: InfoNaviRobot 
User-agent: Iron33/1.0.2 
User-agent: JennyBot 
User-agent: Kenjin Spider 
User-agent: Keyword Density/0.9 
User-agent: larbin 
User-agent: LexiBot 
User-agent: libWeb/clsHTTP 
User-agent: LinkextractorPro 
User-agent: LinkScan/8.1a Unix 
User-agent: LinkWalker 
User-agent: LNSpiderguy 
User-agent: lwp-trivial 
User-agent: lwp-trivial/1.34 
User-agent: Mata Hari 
User-agent: Microsoft URL Control 
User-agent: Microsoft URL Control - 5.01.4511 
User-agent: Microsoft URL Control - 6.00.8169 
User-agent: MIIxpc 
User-agent: MIIxpc/4.2 
User-agent: Mister PiX 
User-agent: moget 
User-agent: moget/2.1 
User-agent: Mozilla/4.0 (compatible; BullsEye; Windows 95) 
User-agent: MSIECrawler 
User-agent: NetAnts 
User-agent: NetMechanic 
User-agent: NICErsPRO 
User-agent: Offline Explorer 
User-agent: Openbot 
User-agent: Openfind 
User-agent: Openfind data gatherer 
User-agent: Oracle Ultra Search 
User-agent: PerMan 
User-agent: ProPowerBot/2.14 
User-agent: ProWebWalker 
User-agent: psbot 
User-agent: Python-urllib 
User-agent: QueryN Metasearch 
User-agent: Radiation Retriever 1.1 
User-agent: RepoMonkey 
User-agent: RepoMonkey Bait & Tackle/v1.01 
User-agent: RMA 
User-agent: searchpreview 
User-agent: SiteSnagger 
User-agent: seekbot 
User-agent: Seekbot 
User-agent: Seekbot/1.0 
User-agent: SpankBot 
User-agent: spanner 
User-agent: SurveyBot
User-agent: suzuran 
User-agent: Szukacz/1.4 
User-agent: Teleport 
User-agent: TeleportPro 
User-agent: Telesoft 
User-agent: The Intraformant 
User-agent: TheNomad 
User-agent: TightTwatBot 
User-agent: toCrawl/UrlDispatcher 
User-agent: True_Robot 
User-agent: True_Robot/1.0 
User-agent: turingos 
User-agent: TurnitinBot 
User-agent: TurnitinBot/1.5 
User-agent: URL Control 
User-agent: URL_Spider_Pro 
User-agent: URLy Warning 
User-agent: VCI 
User-agent: VCI WebViewer VCI WebViewer Win32 
User-agent: Web Image Collector 
User-agent: WebAuto 
User-agent: WebBandit 
User-agent: WebBandit/3.50 
User-agent: WebCapture 2.0 
User-agent: WebCopier 
User-agent: WebCopier v.2.2 
User-agent: WebCopier v3.2a 
User-agent: WebEnhancer 
User-agent: Web Reaper
User-agent: WebSauger 
User-agent: Website Quester 
User-agent: Webster Pro 
User-agent: WebStripper 
User-agent: WebZip 
User-agent: WebZip 
User-agent: WebZip/4.0 
User-agent: WebZIP/4.21 
User-agent: WebZIP/5.0 
User-agent: WebVulnCrawl
User-agent: WebVulnScan
User-agent: Wget 
User-agent: wget 
User-agent: Wget/1.5.3 
User-agent: Wget/1.6 
User-agent: WWW-Collector-E 
User-agent: Xenu's 
User-agent: Xenu's Link Sleuth 1.1c 
User-agent: Zeus 
User-agent: Zeus 32297 Webster Pro V2.9 Win32 
User-agent: Zeus Link Scout 
Disallow: /

 

Code (markup):

 

Is there a reason you went with disallow, and didn't just do the 3 bots he wants and allow?

 

The reason is the robots exclusion standard never defined allow, because the robots.txt is to exclude stuff.

 

This code is very good but I know one think its working properly or not

 

You can block other spiders using robots.txt file.
Also if you want to restrict certain pages you may use <meta name="robots" content="noindex,nofollow"> so that those pages will not get crawl/indexed ( if you are looking forthe same )