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IT Security and Insecurity Portal www.waraxe.us Forum Index -> Newbies corner -> how to defend againts brute force attacks or other    View previous topic :: View next topic  how to defend againts brute force attacks or other Posted: Fri Apr 21, 2006 11:48 am daniel000 Regular user   Joined: Apr 21, 2006 Posts: 6 I've got a forum and the version is phpbb 2.0.18. The problem is that an anonymous user is creating brute force attacks and is trying to hack the database using exploits in the code. Do you think there is a way to be more secure? Would the upgrade to 2.0.20 resolve some things? Thanks a lot. Last edited by daniel000 on Sat Apr 22, 2006 8:47 pm; edited 1 time in total Posted: Fri Apr 21, 2006 11:53 am Benna Regular user   Joined: Apr 16, 2006 Posts: 20 ciao daniel......hai avuto paura eh? paura.... Posted: Sat Apr 22, 2006 8:37 pm daniel000 Regular user   Joined: Apr 21, 2006 Posts: 6 Excuse me, but I'm afraid I cannot understand what do you mean... Anyway, does anyone know how to defend against these attacks? Thanks. Re: how to defend againts brute force attacks or other Posted: Sun Apr 23, 2006 1:36 am y3dips Valuable expert   Joined: Feb 25, 2005 Posts: 281 Location: Indonesia daniel000 wrote: I've got a forum and the version is phpbb 2.0.18. The problem is that an anonymous user is creating brute force attacks and is trying to hack the database using exploits in the code. Do you think there is a way to be more secure? Would the upgrade to 2.0.20 resolve some things? Thanks a lot. use some image verification code, so user need to input a text that describe in the image to teh text box, use it on user registration and posting section _________________ IO::y3dips->new(http://clog.ammar.web.id); Posted: Sun Apr 23, 2006 10:28 am daniel000 Regular user   Joined: Apr 21, 2006 Posts: 6 Thanks, but I think I didn't explain myself very well. I meant how to defend against little programs that generate passwords (key gen or other) to crack an account on a forum or website. Do these programs have a useragent? So that I can block them directly from the server? Posted: Sun Apr 23, 2006 5:43 pm Chb Valuable expert   Joined: Jul 23, 2005 Posts: 206 Location: Germany daniel000 wrote: Thanks, but I think I didn't explain myself very well. I meant how to defend against little programs that generate passwords (key gen or other) to crack an account on a forum or website. Do these programs have a useragent? So that I can block them directly from the server? Nope, I don't think so. But you can also log into a special table when a fail login has been made. And before the login is checked the script takes a look into this table wheather this host has tried for example three times. If so then make login impossible. _________________ www.der-chb.de Posted: Mon Apr 24, 2006 8:13 pm daniel000 Regular user   Joined: Apr 21, 2006 Posts: 6 Thanks!!! You had a really good idea... But how do you think I could block them? Blocking their user agent... but I think they can change them Blocking their IP... but many users have a dynamic IP!!! What do you think? Posted: Tue Apr 25, 2006 4:42 am Chb Valuable expert   Joined: Jul 23, 2005 Posts: 206 Location: Germany There are some ways. 1) IP-Banning after x fail-logins 2) Cookie-Setting after x fail-logins and check them for to check if the user has been banned for y minutes 3) Captchas (e.g. chars in a picture which you have to write down to login) 4) Ban the user for y minutes if there were x fail-logins... _________________ www.der-chb.de Posted: Tue Apr 25, 2006 8:35 pm daniel000 Regular user   Joined: Apr 21, 2006 Posts: 6 Thanks a lot!!! how to defend againts brute force attacks or other   www.waraxe.us Forum Index -> Newbies corner You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum All times are GMT   Page 1 of 1   All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First  Select a forum Security Research by waraxe----------------General discussionHow to fixMetasploit related Hash cracking requests----------------MD5 hashesAll other hashesHash related information http://www.waraxe.us portal----------------SuggestionsCooperation proposals Security bugs and issues in general----------------Newbies cornerSql injectionCross-site scripting aka XSSRemote file inclusionFull path disclosureShell commands injectionPhishing and Social EngineeringAll other security holes Various software----------------PhpNukePostNukePhpBBXMB forumvBulletin BoardInvision Power Boarde107MamboJoomlaXOOPSM$ WindowsLinux worldAll other softwareCoppermine Photo Gallery Programming languages----------------PhpMySqlPerlJavaJavascriptC and C++Visual BasicBorland Delphi and PascalPythonHTML and XMLAssembler Reverse engineering----------------Newbies cornerDisassemblingPHP script decode requests Miscellaneous stuff----------------Future of the ITNanotechnologyFun cornerLinksTry2hack sitesProxy database Direct Downloads----------------ToolsTutorialsWordlists Recycle Bin----------------Removed messagesOutdated posts   Powered by phpBB © 2001-2008 phpBB Group

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