▲ 10 r/EmailSecurity+1 crossposts

How to Stop OTP SMS Abuse When Attackers Rotate Valid Phone Numbers, Emails, and IPs?

Hi friends, I am currently dealing with a problem. An unknown person is targeting the OTP SMS service on our website's sign-up page. They are attempting this using multiple phone numbers, multiple email addresses, and rotating IP addresses. We are already using email validation services, yet they are using email addresses like "bowobon834@sepmaf.com" and "kiyow78785@toooby.com." They are also using a specific series of mobile numbers, such as:

"+201195127174", "+201181110723", "+201195130069",

"+201195127216",

"+201181111455",

"+201195127472",

"+201181113961",

"+201195127038",

"+201195129482",

"+201000177595",

All these numbers are valid. What kind of service provides such valid numbers? By submitting only valid numbers, they are negatively impacting our SMS budget. They are using two types of emails: valid permanent ones (like "mai.t.hi.e.ndi.9.5.5.11@gmail.com", "ph.a.nd.ong.nh.i.19.5.8.5@gmail.com", "m.er.ed.ith.geron.i.mo.24.1@gmail.com") and temporary ones (like "nofon85312@sepmaf.com", "yiridog100@toooby.com", "sapija5854@sepmaf.com").

Both types of emails they are using are valid. There are so many services that provide temporary emails; it is impossible to block them all. We simply won't be able to block every single one.

currently we create a script to mai.t.hi.e.ndi.9.5.5.11@gmail.com that pattern email but. when user email is normal and pass email verification service and able to create account in that case they put mobile number and send otp the promblem is occured the all number is valid in lookup api and they rotate the number, IP to prevent throttling.

What really matters is the service that provides valid phone numbers. If anyone has information about such services, please help us out.

Hi friends, I am currently dealing with a problem. An unknown person is targeting the OTP SMS service on our website's sign-up page. They are attempting this using multiple phone numbers, multiple email addresses, and rotating IP addresses. We are already using email validation services, yet they are using email addresses like "bowobon834@sepmaf.com" and "kiyow78785@toooby.com." They are also using a specific series of mobile numbers, such as:

"+201195127174", "+201181110723", "+201195130069",

"+201195127216",

"+201181111455",

"+201195127472",

"+201181113961",

"+201195127038",

"+201195129482",

"+201000177595",

All these numbers are valid. What kind of service provides such valid numbers? By submitting only valid numbers, they are negatively impacting our SMS budget. They are using two types of emails: valid permanent ones (like "mai.t.hi.e.ndi.9.5.5.11@gmail.com", "ph.a.nd.ong.nh.i.19.5.8.5@gmail.com", "m.er.ed.ith.geron.i.mo.24.1@gmail.com") and temporary ones (like "nofon85312@sepmaf.com", "yiridog100@toooby.com", "sapija5854@sepmaf.com").

Both types of emails they are using are valid. There are so many services that provide temporary emails; it is impossible to block them all. We simply won't be able to block every single one.

currently we create a script to mai.t.hi.e.ndi.9.5.5.11@gmail.com that pattern email but. when user email is normal and pass email verification service and able to create account in that case they put mobile number and send otp the promblem is occured the all number is valid in lookup api and they rotate the number, IP to prevent throttling.

Currently we do our best. Anyone guide me how we can handle in much efficiently of that kind of problems.

What really matters is the service that provides valid phone numbers. If anyone has information about such services, please help us out.

Let us know whos provider that kind of virtual numbers infinite as i review they use 200 mobile number to send otp.

reddit.com
u/Try_something_differ — 2 days ago

Before writing the blog, how did you research it?

I would like to know how you decide whether you are writing a blog about a specific product or service, or for any other purpose which topic to choose in order to improve its ranking. How do you go about this decision? What research methods do you use to find a topic that would be beneficial for improving the ranking of that product or service?

Whenever I have to write a blog post related to my product or service, I often feel confused about what to write and how to conduct the research needed to find the best topic one that would truly benefit my website, product, or service.

Once you have selected a topic, how do you structure or design the content to ensure it makes an impact on the user or reader? How do you ensure they find exactly what they were looking for within that blog post?

reddit.com
u/Try_something_differ — 3 days ago

Short blogs vs. Long blogs: What is working best for you right now?

Long-term blogs have the advantage of allowing us to discuss topics in depth and detail. The more content, the more likely it is to answer many questions related to that topic, even in AI search. Am I right?

Shorter-term blogs will be more readable because they are shorter, allowing users to read them easily, and we will only discuss valuable topics related to the topic. They will be point-to-point, not in-depth. And by writing short blogs, we will be able to cover more topics quickly.

So, which strategy are you focusing on these days? Should you write long, in-depth blogs, or should you publish in greater numbers on smaller, point-to-point, short-term articles that hit the target?

How do you balance covering topics deeply and maintaining user readability?

I'm curious to know what strategy is working best for your blogs these days. Please share your experiences!

reddit.com
u/Try_something_differ — 16 days ago

Long form vs. Short form blogs content: Which strategy is providing better results for you right now?

Long term blogs have the advantage of allowing us to discuss topics in depth and detail. The more content, the more likely it is to answer many questions related to that topic, even in AI search. Am I right?

Shorter-term blogs will be more readable because they are shorter, allowing users to read them easily, and we will only discuss valuable topics related to the topic. They will be point-to-point, not in-depth. And by writing short blogs, we will be able to cover more topics quickly.

So, which strategy are you focusing on these days? Should you write long, in-depth blogs, or should you publish in greater numbers on smaller, point-to-point, short-term articles that hit the target?

How do you balance covering topics deeply and maintaining user readability?

I'm curious to know what strategy is working best for your blogs these days. Please share your experiences!

reddit.com
u/Try_something_differ — 16 days ago

Can anyone tell me whether we should post long-form blogs or short-term blogs?

Long-term blogs have the advantage of allowing us to discuss topics in depth and detail. The more content, the more likely it is to answer many questions related to that topic, even in AI search. Am I right?

Shorter-term blogs will be more readable because they are shorter, allowing users to read them easily, and we will only discuss valuable topics related to the topic. They will be point-to-point, not in-depth. And by writing short blogs, we will be able to cover more topics quickly.

So, which strategy are you focusing on these days? Should you write long, in-depth blogs, or should you publish in greater numbers on smaller, point-to-point, short-term articles that hit the target?

How do you balance covering topics deeply and maintaining user readability?

I'm curious to know what strategy is working best for your blogs these days. Please share your experiences!

reddit.com
u/Try_something_differ — 16 days ago
▲ 3 r/SEO_Xpert+1 crossposts

How many time one keyword can repeat in a blog

Can anyone help me figure out a some SEO related question's better answer "how many times can I repeat a single keyword in a blog"

one more question is "how many keywords should be targeted in a blog" And "how many internal links of site related, should be added in a blog" that looks natural for Google.

reddit.com
u/Try_something_differ — 24 days ago

How many time one keyword can repeat in a blog

Can anyone help me figure out a SEO friendly question "how many times can I repeat a single keyword in a blog"

one more question is "how many keywords should be targeted in a blog" And "how many internal links of site related, should be added in a blog" that looks natural for Google.

reddit.com
u/Try_something_differ — 24 days ago

Can anyone help me to find a best Free blogging Tools

I want to start writing blogs for my website on other tools that make backlinking and build authority for my site. Can anyone tell the best free blogging websites. Where I can publish more content and make backlinks for my website. And I want to know what that is if I publish blogs there. is they Crawl or show on Google and other search engines.

reddit.com
u/Try_something_differ — 1 month ago

Can anyone help me to find out Best Free bloging websites

I want to start writing blogs for my website on other tools that make backlinking and build authority for my site. Can anyone tell the best free blogging websites. Where I can publish more content and make backlinks for my website. And I want to know what that is if I publish blogs there. is they Crawl or show on Google and other search engines.

reddit.com
u/Try_something_differ — 1 month ago