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Questions tagged [ddos]

A distributed denial of service attack (DDoS) occurs when multiple systems flood the bandwidth or resources of a targeted system, usually one or more web servers. These systems are compromised by attackers using a variety of methods.

A distributed denial of service attack (DDoS) occurs when multiple systems flood the bandwidth or resources of a targeted system, usually one or more web servers. These systems are compromised by attackers using a variety of methods.

For information on what to do about a DDoS attack that is underway, see How can I stop a currently active DDoS attack?

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Fail2Ban to block IPs that request the same URL repeatedly

Is it possible to use Fail2Ban to block IPs that request the same URL more than 5 times in 10 seconds? I'm not talking about a specific URL, but any random URL of the site that is being requested repeatedly. For example: I don't want to block in a…
viniciussss
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block or log IPs that direct access my website (ubuntu , nginx)

The website is under DDOS, the cloud service is doing a pretty good job for a cost of dozen bugs a month. We are happy! However the attackers have been hitting our site with IP. Currently, we 301 forward them to the DNS name (managed by could…
Phung D. An
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Is there a way on the server side to punish evil visitor?

For example an admin page that should not be visited unless with special cookie or query string token. The point being that anyone who tried and failed would likely be with bad intention. Or when the connection has ddos behavior. Is there a way that…
user2643506
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Is this DoS attack

I am seeing a huge number of connections from a single IP. # netstat -alpn | grep :80 | grep 92.98.64.103 tcp 0 0 my.ip.address.x:80 92.98.64.103:45629 TIME_WAIT - tcp 0 0…
Joyce Babu
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hardware antiddos solution

We have three servers on colo in datacenter for hi-load e-commerce web project connected via cisco catalyst 2960. We need to make antiddos system with hardware firewall, CISCO Guard etc. CISCO Guard is out of the date and no longer being sold and…
Andrey
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server is being used for ddos attacks, any scripts to search for these?

One of our vps' on rackspace is being used for ddos'ing which means we have a vulnerability somewhere. Is there any ssh scripts or tools that can scan for scripts doing this?
Joe
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Does it make sense to have a server dedicated to login?

Since the login process itself involves an expensive hash, it also makes this part of any app vulnerable to (D)DOS attacks. Is it a good idea to put the login portion of the app on it's own dedicated servers as one line of defense or are there…
user420667
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Trying to understand something

So I'm trying to figure something out, if I receive UDP traffic to my server from another server I can't really block it, like the iptables it's just blocking the traffic to being processed, but I want to stop it reaching the interface, is there any…
Curean Nicușor
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Can I report malicious ip addresses for money?

My servers get attacks from thousands of ip addresses everyday. I have an idea. Can I report those malicious ip addresses, or use the resource to earn some money? How? You may think these attacks are common on the Internet. But the attacks to my…
William
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