Questions tagged [web-crawler]

For questions about how to use or defend against web-crawlers or web-spiders.

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84
votes
10answers
16k views

How and why is my site being abused?

I own a popular website that allows people to enter a phone number and get information back about that phone number, such as the name of the phone carrier. It's a free service, but it costs us money ...
3
votes
1answer
146 views

How to crawl a web site if content is only visible to registered accounts?

I am reading abpit the attack amd defense strategies of web spiders. Assume I have sensitive information on my website, which should be protected from 3rd party web spiders. Use case #1: Me: I set ...
1
vote
1answer
120 views

Why fingerprint a browser if a fingerprint can be replayed?

I'm facing an issue with rampant scraping and abuse on a website that costs me a good chunk of money to maintain. So, I have been looking to implement a few solutions, and apparently these solutions ...
1
vote
1answer
152 views

Why is my web site being scanned for license.txt, and should I be worried?

Lately I am seeing multiple daily 404s for variations of "license.txt", e.g., "wordpress/license.txt", "blog/license.txt", "old/license.txt", "new/license.txt". Here's a little snippet of slightly ...
1
vote
1answer
104 views

How do I prove that robots.txt was not provded [closed]

I want to scrape our university's learning platform website, to let myself know via notifications when a new entry added to any lesson. But, I'm scared that they'll put robots.txt afterwards and sue ...
1
vote
1answer
125 views

Questions about SOCKS5 security

I'm planning to start a distributed crawler in order to avoid common limitations imposed by servers/CDN like rate limit, region filter, and others. My idea is to have a central server and multiple ...
1
vote
1answer
124 views

Does a searchable public database exist of (hostname; ip) mappings?

This question is not about the trivial usage of the forward/reverse DNS. Getting the IP of a hostname is trivial (DNS), and using reverse DNS, also we can get (typically) a single hostname of an IP. ...
1
vote
0answers
169 views

I run a web crawler on my localhost computer, can my ISP detects that? [closed]

I'm using an Internet plan of 100GB bandwidth monthly from my ISP, and I made a simple web crawler for fun and run it on my personal computer 24/7. The crawler is consuming all of the bandwidth, and I ...
0
votes
1answer
134 views

How do attackers hit a website with thousands of similar but distinct IP addresses?

I have a website that is being hit with invalid URL requests by thousands of distinct IP addresses, never the same one used twice. Most of them are in a few ranges of IP addresses and often just go ...
0
votes
0answers
1k views

How to Spoof JA3 Signature?

I am using python requests library to make HTTP calls. However website bot detection is using JA3 fingerprint verification and blocking me. Is there any way I can spoof the JA3 signature.
0
votes
1answer
163 views

Are AWS Signed URL's crawled by google?

I have used Amazon pre signed url to share content. https://boto3.amazonaws.com/v1/documentation/api/latest/guide/s3-presigned-urls.html Is google able to crawl this url? I'm sharing this url with ...
-1
votes
1answer
310 views

Spider (web scrawling) vs Force Browsing

I'm scanning websites with OWASP ZAP and noticed that the Spider attack and Force Browse attack return somewhat different results. What are the differences between Web Spiders (Web Crawlers) and ...