Failed SSHD Login Attempts (15,000 per day) - Is that a lot compared to your server?


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Special Forums Cybersecurity Failed SSHD Login Attempts (15,000 per day) - Is that a lot compared to your server?
# 8  
Quote:
Originally Posted by stomp
@Neo: Thanks for rephrasing and clarifying your request!

Here's a script which calculates the FLAPM value:
THANKS!

Yes, my first post was vague and not clear, so I started over and tried to be more clear.

That's what happens when I am multi-tasking many tasks at once and just do a "quick post" without putting my full thoughts down in the post. My bad and sorry for the earlier confusion.

Your script is really great and a strong contribution.

Perhaps in the future we should add a flag each server can be identified if fail2ban is turned on?

What do you think? Is that an important metric to add, do you think?
# 9  
Quote:
That's what happens when I am multi-tasking many tasks at once and just do a "quick post" without putting my full thoughts down in the post.
Same from receiving side. I also only just had a very quick read on your post.

Instead of one car crashing into a wall two cars crashing frontal into each other with the same speed do square damage instead of just double. So square amount of misunderstanding here ;-)

More maybe later.

Last edited by stomp; 09-27-2019 at 02:54 PM..
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# 10  
Quote:
fail2ban ... What do you think? Is that an important metric to add, do you think?
It maybe fail2ban is configured properly, up and running. That will definitely explain a rate below average. But f2b can be running without being configured to do blocking at all or not correctly adapted to the system. It may be a weak variable.

What regards the ssh port. From my experience it will make a huge difference if it's running on default port 22 or a custom port. Most attackers are just using the easiest methods because there's still enough to harvest.

Regarding my server list:

I did a quick check and removed the results which might not be plausible(flapm <= 0). There might be a pool of servers not shown because flapm rounded down to zero.

Last edited by stomp; 09-27-2019 at 03:10 PM..
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# 11  
FYI.

Normally, I do not run automatic banning systems, but after reviewing fail2ban again, I see the ban is configured out-of-the-box to only ban for a short period.

So, am testing fail2ban on all my Linux servers.

However, I agree with you stomp, that changing the sshd port from 22 to another value is one of the best deterrents agains these bots.

The same is also true for web software, for example Word Press. The best way to stop bot registrations, bot logins and spam posts is to change the URL of the registration, log in or posting scripts.

Also, having said that, I was hoping not to quickly get into remediation and risk management; but to get more people to post their FLAPM stats; using our simple method, so we could gather more stats.
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