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.
How do I complete a reverse DNS check when completing log file analysis?
-
I'm doing some log file analysis and need to run a reverse DNS check to ensure that I'm analysing logs from Google and not any imposters. Is there a command I can use in terminal to do this?
If not, whats the best way to verify Googlebot?
Thanks
-
That's awesome! Glad to know there's a bulk tool out there!
-
Hi Tyler,
Thanks for your reply. I managed to get down to 98 unique IPs and ran a bulk reverse DNS/IP Look-up using this tool:
https://www.infobyip.com/ipbulklookup.php
Thanks for your help though!
-
Hey Daniel,
If you want to verify that a user-agent is actually Googlebot, you'll want to use a log file analysis tool to aggregate all of the IP addresses associated with Googlebot. Once you have a list of IP addresses, you can perform a reverse DNS lookup to verify whether the IP addresses are actually associated with Googlebot or not.
If you're on windows/pc these steps should work:
https://www.serverintellect.com/support/dns/reverse-dns/If you're on mac try these steps:
1. open Terminal
2. type "host" + ip address
for example: "host 66.249.66.1"
3. hit enter
4. view results. For example: "1.66.249.66.in-addr.arpa domain name pointer crawl-66-249-66-1.googlebot.com"If the results are from Google.com or Googlebot.com, you can be sure it's actually Google crawling your site. Unfortunately, I don't know of any faster ways to achieve these results. I'm sure there's a tool out there, I just haven't found it yet.
This might also be a good resource for you: https://support.google.com/webmasters/answer/80553?hl=en
Good luck!
-Tyler
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
-
Do I need a separate robots.txt file for my shop subdomain?
Hello Mozzers! Apologies if this question has been asked before, but I couldn't find an answer so here goes... Currently I have one robots.txt file hosted at https://www.mysitename.org.uk/robots.txt We host our shop on a separate subdomain https://shop.mysitename.org.uk Do I need a separate robots.txt file for my subdomain? (Some Google searches are telling me yes and some no and I've become awfully confused!
Technical SEO | | sjbridle0 -
Multiple robots.txt files on server
Hi! I have previously hired a developer to put up my site and noticed afterwards that he did not know much about SEO. This lead me to starting to learn myself and applying some changes step by step. One of the things I am currently doing is inserting sitemap reference in robots.txt file (which was not there before). But just now when I wanted to upload the file via FTP to my server I found multiple ones - in different sizes - and I dont know what to do with them? Can I remove them? I have downloaded and opened them and they seem to be 2 textfiles and 2 dupplicates. Names: robots.txt (original dupplicate)
Technical SEO | | mjukhud
robots.txt-Original (original)
robots.txt-NEW (other content)
robots.txt-Working (other content dupplicate) Would really appreciate help and expertise suggestions. Thanks!0 -
Does using a reverse proxy to make a subdomain appear as a subdirectory affect SEO?
Using a reverse proxy only makes it appear that a subdomain is really a subfolder. However, links in the end remain the same. Does this have any negative (or positive) impact on SEO? Does it make it difficult from the blog's (subdomain's) sitemap or robots.txt file to be properly read by search engines?
Technical SEO | | rodelmo41 -
One robots.txt file for multiple sites?
I have 2 sites hosted with Blue Host and was told to put the robots.txt in the root folder and just use the one robots.txt for both sites. Is this right? It seems wrong. I want to block certain things on one site. Thanks for the help, Rena
Technical SEO | | renalynd270 -
How to check if an individual page is indexed by Google?
So my understanding is that you can use site: [page url without http] to check if a page is indexed by Google, is this 100% reliable though? Just recently Ive worked on a few pages that have not shown up when Ive checked them using site: but they do show up when using info: and also show their cached versions, also the rest of the site and pages above it (the url I was checking was quite deep) are indexed just fine. What does this mean? thank you p.s I do not have WMT or GA access for these sites
Technical SEO | | linklander0 -
How can I find my Webmaster Tools HTML file?
So, totally amateur hour here, but I can't for the life of me find our HTML verification file for webmaster tools. I see nowhere to look at it in Google Webmaster Tools console, I tried a site:, I googled it, all the info out there is about how to verify a site. Ours is verified, but I need the verification file code to sync up with the Google API and no one seems to have it. Any thoughts?
Technical SEO | | healthgrades0 -
Robots.txt file getting a 500 error - is this a problem?
Hello all! While doing some routine health checks on a few of our client sites, I spotted that a new client of ours - who's website was not designed built by us - is returning a 500 internal server error when I try to look at the robots.txt file. As we don't host / maintain their site, I would have to go through their head office to get this changed, which isn't a problem but I just wanted to check whether this error will actually be having a negative effect on their site / whether there's a benefit to getting this changed? Thanks in advance!
Technical SEO | | themegroup0 -
Dynamically-generated .PDF files, instead of normal pages, indexed by and ranking in Google
Hi, I come across a tough problem. I am working on an online-store website which contains the functionlaity of viewing products details in .PDF format (by the way, the website is built on Joomla CMS), now when I search my site's name in Google, the SERP simply displays my .PDF files in the first couple positions (shown in normal .PDF files format: [PDF]...)and I cannot find the normal pages there on SERP #1 unless I search the full site domain in Google. I really don't want this! Would you please tell me how to figure the problem out and solve it. I can actually remove the corresponding component (Virtuemart) that are in charge of generating the .PDF files. Now I am trying to redirect all the .PDF pages ranking in Google to a 404 page and remove the functionality, I plan to regenerate a sitemap of my site and submit it to Google, will it be working for me? I really appreciate that if you could help solve this problem. Thanks very much. Sincerely SEOmoz Pro Member
Technical SEO | | fugu0