Moz Q&A is closed.
After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
May know what's the meaning of these parameters in .htaccess?
-
Begin HackRepair.com Blacklist
RewriteEngine on
Abuse Agent Blocking
RewriteCond %{HTTP_USER_AGENT} ^BlackWidow [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Bolt\ 0 [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Bot\ mailto:craftbot@yahoo.com [NC,OR]
RewriteCond %{HTTP_USER_AGENT} CazoodleBot [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^ChinaClaw [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Custo [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Default\ Browser\ 0 [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^DIIbot [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^DISCo [NC,OR]
RewriteCond %{HTTP_USER_AGENT} discobot [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Download\ Demon [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^eCatch [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ecxi [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^EirGrabber [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^EmailCollector [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^EmailSiphon [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^EmailWolf [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Express\ WebPictures [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^ExtractorPro [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^EyeNetIE [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^FlashGet [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^GetRight [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^GetWeb! [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Go!Zilla [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Go-Ahead-Got-It [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^GrabNet [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Grafula [NC,OR]
RewriteCond %{HTTP_USER_AGENT} GT::WWW [NC,OR]
RewriteCond %{HTTP_USER_AGENT} heritrix [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^HMView [NC,OR]
RewriteCond %{HTTP_USER_AGENT} HTTP::Lite [NC,OR]
RewriteCond %{HTTP_USER_AGENT} HTTrack [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ia_archiver [NC,OR]
RewriteCond %{HTTP_USER_AGENT} IDBot [NC,OR]
RewriteCond %{HTTP_USER_AGENT} id-search [NC,OR]
RewriteCond %{HTTP_USER_AGENT} id-search.org [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Image\ Stripper [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Image\ Sucker [NC,OR]
RewriteCond %{HTTP_USER_AGENT} Indy\ Library [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^InterGET [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Internet\ Ninja [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^InternetSeer.com [NC,OR]
RewriteCond %{HTTP_USER_AGENT} IRLbot [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ISC\ Systems\ iRc\ Search\ 2.1 [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Java [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^JetCar [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^JOC\ Web\ Spider [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^larbin [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^LeechFTP [NC,OR]
RewriteCond %{HTTP_USER_AGENT} libwww [NC,OR]
RewriteCond %{HTTP_USER_AGENT} libwww-perl [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Link [NC,OR]
RewriteCond %{HTTP_USER_AGENT} LinksManager.com_bot [NC,OR]
RewriteCond %{HTTP_USER_AGENT} linkwalker [NC,OR]
RewriteCond %{HTTP_USER_AGENT} lwp-trivial [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Mass\ Downloader [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Maxthon$ [NC,OR]
RewriteCond %{HTTP_USER_AGENT} MFC_Tear_Sample [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^microsoft.url [NC,OR]
RewriteCond %{HTTP_USER_AGENT} Microsoft\ URL\ Control [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^MIDown\ tool [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Mister\ PiX [NC,OR]
RewriteCond %{HTTP_USER_AGENT} Missigua\ Locator [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Mozilla.*Indy [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Mozilla.NEWT [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^MSFrontPage [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Navroad [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^NearSite [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^NetAnts [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^NetSpider [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Net\ Vampire [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^NetZIP [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Nutch [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Octopus [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Offline\ Explorer [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Offline\ Navigator [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^PageGrabber [NC,OR]
RewriteCond %{HTTP_USER_AGENT} panscient.com [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Papa\ Foto [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^pavuk [NC,OR]
RewriteCond %{HTTP_USER_AGENT} PECL::HTTP [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^PeoplePal [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^pcBrowser [NC,OR]
RewriteCond %{HTTP_USER_AGENT} PHPCrawl [NC,OR]
RewriteCond %{HTTP_USER_AGENT} PleaseCrawl [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^psbot [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^RealDownload [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^ReGet [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Rippers\ 0 [NC,OR]
RewriteCond %{HTTP_USER_AGENT} SBIder [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^SeaMonkey$ [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^sitecheck.internetseer.com [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^SiteSnagger [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^SmartDownload [NC,OR]
RewriteCond %{HTTP_USER_AGENT} Snoopy [NC,OR]
RewriteCond %{HTTP_USER_AGENT} Steeler [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^SuperBot [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^SuperHTTP [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Surfbot [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^tAkeOut [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Teleport\ Pro [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Toata\ dragostea\ mea\ pentru\ diavola [NC,OR]
RewriteCond %{HTTP_USER_AGENT} URI::Fetch [NC,OR]
RewriteCond %{HTTP_USER_AGENT} urllib [NC,OR]
RewriteCond %{HTTP_USER_AGENT} User-Agent [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^VoidEYE [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Web\ Image\ Collector [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Web\ Sucker [NC,OR]
RewriteCond %{HTTP_USER_AGENT} Web\ Sucker [NC,OR]
RewriteCond %{HTTP_USER_AGENT} webalta [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^WebAuto [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^[Ww]eb[Bb]andit [NC,OR]
RewriteCond %{HTTP_USER_AGENT} WebCollage [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^WebCopier [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^WebFetch [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^WebGo\ IS [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^WebLeacher [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^WebReaper [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^WebSauger [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Website\ eXtractor [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Website\ Quester [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^WebStripper [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^WebWhacker [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^WebZIP [NC,OR]
RewriteCond %{HTTP_USER_AGENT} Wells\ Search\ II [NC,OR]
RewriteCond %{HTTP_USER_AGENT} WEP\ Search [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Wget [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Widow [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^WWW-Mechanize [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^WWWOFFLE [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Xaldon\ WebSpider [NC,OR]
RewriteCond %{HTTP_USER_AGENT} zermelo [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^Zeus [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ^(.)Zeus.Webster [NC,OR]
RewriteCond %{HTTP_USER_AGENT} ZyBorg [NC]
RewriteRule ^. - [F,L]Abuse bot blocking rule end
End HackRepair.com Blacklist
-
Now it's clear. Thanks a lot ThompsonPaul!
-
Thanks!
Typically these blacklists are created and maintained by security specialists who have done testing on the different bots to determine which are legit/beneficial and which are crapbots. They then provide these lists for others to use. Often the lists are amalgamations of bots detected and analysed on a number of different sites and by a number of different specialists to act as a double-check for each other.
You do need to be careful that you are using a well-curated list, as carelessly blocking bots can cause problems for legitimate bots. You would check out the creator of such a list the same way you'd check out the creator of a plugin you're considering using - check reviews, look at comments and responses on the post that provides the blacklist etc.
That answer your question?
Paul
-
Hi ThompsonPaul,
Wow! Superb explanation. One thing I just want to clarify, how would I know if these bots are "bad bots".
Thanks a lot!
-
As Lynn mentions, these entries form a blacklist for "bad bots". These are bots that are identified as being harmful (or at least non-helpful) to the real use of a website. Bots are essentially spiders that crawl and record the pages of your site the same way the GoogleBot does.There are 2 main reasons for blocking them
-
Too many unnecessary bots can put a real strain on server resources, causing the site to slow down for real users. This can be especially problematic with bad bots as they do not respect the entries in your robots.txt file and so will crawl even blocked pages. This can mean huge numbers of extra pages get crawled, leading to even more load.
-
Many (most?) of these bots are collecting data for nefarious purposes. Some are scrapers to collect your site content in order to re-use it illegally on another site, some are scanning for certain files/plugins on your site known to be insecure so they can target them for attack, etc.
Best case scenario, these bots waste your bandwidth and can cause site slowdowns on low-powered (e.g. shared) servers. Worst case, they can actually cause harm to your site.
There are literally many thousands of these types of bots out there, and their creators often change their identifying user agents just to get around these types of blacklists. But many have been around for some time and still use the same identifier. So having a blacklist to block the most common of them is actually very good security practice. To be totally proactive however, you'd need to update the list every couple of months.
Bottom line - those entries are providing some security and overload protection for your site, and there's essentially no downside to having them in place even if they're not catching everything.
Hope that helps - if any of my explanation isn't clear, just holler
Paul
-
-
Thanks Lynn! I'll just remove these parameters and leave this one:
BEGIN WordPress
<ifmodule mod_rewrite.c="">RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
Rewritecond %{http_host} ^domain.com [NC]
Rewriterule ^(.*)$ http://www.domain.com/$1 [R=301,NC]</ifmodule>END WordPress
-
I dont use something like this myself. I suppose if you are having some problem with bots it might be useful, maybe someone else can chime in if they have some experience with this kind of blocking.
-
Thanks Lynn! Is this really necessary?
-
HI,
It is checking to see if the visiting user agent contains any of these strings (NC is telling it non case sensitive) and if it does to return a 403 forbidden message.
Got a burning SEO question?
Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.
Browse Questions
Explore more categories
-
Moz Tools
Chat with the community about the Moz tools.
-
SEO Tactics
Discuss the SEO process with fellow marketers
-
Community
Discuss industry events, jobs, and news!
-
Digital Marketing
Chat about tactics outside of SEO
-
Research & Trends
Dive into research and trends in the search industry.
-
Support
Connect on product support and feature requests.
Related Questions
-
Does Google ignore content styled with 'display:none'?
Do you know if an H1 within a div that has a 'display: none' style applied will still be crawled and evaluated by Google? We have that situation on this page on line 136: view-source:https://www.junk-king.com/services/items-we-take/foreclosure-cleanouts Of course we also have an H1 up at the top of the page and are concerned that the second one will cause interference with our SEO efforts. I've seen conflicting and inconclusive information on line - not sure. Thanks for any help.
Intermediate & Advanced SEO | | rastellop0 -
My "search visibility" went from 3% to 0% and I don't know why.
My search visibility on here went from 3.5% to 3.7% to 0% to 0.03% and now 0.05% in a matter of 1 month and I do not know why. I make changes every week to see if I can get higher on google results. I do well with one website which is for a medical office that has been open for years. This new one where the office has only been open a few months I am having trouble. We aren't getting calls like I am hoping we would. In fact the only one we did receive I believe is because we were closest to him in proximity on google maps. I am also having some trouble with the "Links" aspect of SEO. Everywhere I see to get linked it seems you have to pay. We are a medical office we aren't selling products so not many Blogs would want to talk about us. Any help that could assist me with getting a higher rank on google would be greatly appreciated. Also any help with getting the search visibility up would be great as well.
Intermediate & Advanced SEO | | benjaminleemd1 -
Changed all external links to 'NoFollow' to fix manual action penalty. How do we get back?
I have a blog that received a Webmaster Tools message about a guidelines violation because of "unnatural outbound links" back in August. We added a plugin to make all external links 'NoFollow' links and Google removed the penalty fairly quickly. My question, how do we start changing links to 'follow' again? Or at least being able to add 'follow' links in posts going forward? I'm confused by the penalty because the blog has literally never done anything SEO-related, they have done everything via social and email. I only started working with them recently to help with their organic presence. We don't want them to hurt themselves at all, but 'follow' links are more NATURAL than having everything as 'NoFollow' links, and it helps with their own SEO by having clean external 'follow' links. Not sure if there is a perfect answer to this question because it is Google we're dealing with here, but I'm hoping someone else has some tips that I may not have thought about. Thanks!
Intermediate & Advanced SEO | | HashtagJeff0 -
What's the best way to noindex pages but still keep backlinks equity?
Hello everyone, Maybe it is a stupid question, but I ask to the experts... What's the best way to noindex pages but still keep backlinks equity from those noindexed pages? For example, let's say I have many pages that look similar to a "main" page which I solely want to appear on Google, so I want to noindex all pages with the exception of that "main" page... but, what if I also want to transfer any possible link equity present on the noindexed pages to the main page? The only solution I have thought is to add a canonical tag pointing to the main page on those noindexed pages... but will that work or cause wreak havoc in some way?
Intermediate & Advanced SEO | | fablau3 -
Is Chamber of Commerce membership a "paid" link, breaking Google's rules?
Hi guys, This drives me nuts. I hear all the time that any time value is exchanged for a link that it technically violates Google's guidelines. What about real organizations, chambers of commerce, trade groups, etc. that you are a part of that have online directories with DO-follow links. On one hand people will say these are great links with real value outside of search and great for local SEO..and on the other hand some hardliners are saying that these technically should be no-follow. Thoughts???
Intermediate & Advanced SEO | | RickyShockley0 -
Bing flags multiple H1's as an issue of high importance--any case studies?
Going through Bing's SEO Analyzer and found that Bing thinks having multiple H1's on a page is an issue. It's going to be quite a bit of work to remove the H1 tags from various pages. Do you think this is a major issue or not? Does anyone know of any case studies / interviews to show that fixing this will lead to improvement?
Intermediate & Advanced SEO | | nicole.healthline0 -
Include Cross Domain Canonical URL's in Sitemap - Yes or No?
I have several sites that have cross domain canonical tags setup on similar pages. I am unsure if these pages that are canonicalized to a different domain should be included in the sitemap. My first thought is no, because I should only include pages in the sitemap that I want indexed. On the other hand, if I include ALL pages on my site in the sitemap, once Google gets to a page that has a cross domain canonical tag, I'm assuming it will just note that and determine if the canonicalized page is the better version. I have yet to see any errors in GWT about this. I have seen errors where I included a 301 redirect in my sitemap file. I suspect its ok, but to me, it seems that Google would rather not find these URL's in a sitemap, have to crawl them time and time again to determine if they are the best page, even though I'm indicating that this page has a similar page that I'd rather have indexed.
Intermediate & Advanced SEO | | WEB-IRS0 -
Is 404'ing a page enough to remove it from Google's index?
We set some pages to 404 status about 7 months ago, but they are still showing in Google's index (as 404's). Is there anything else I need to do to remove these?
Intermediate & Advanced SEO | | nicole.healthline0