Linked Questions

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0answers
5 views

What is the optimal (best) value for PORTFLOOD in CSF firewall? [duplicate]

What is the optimal value or best value for PORTFLOOD in CSF firewall. This setting is for shared hosting environment, where we have hosted 100s of small websites. Mainly we want to prevent it from ...
-2
votes
0answers
30 views

How to block a DDoS attack? [duplicate]

My website is under a DDoS attack with bots. They are all coming in from different IPs so I can't block them all. Is it possible to make a CAPTCHA or a password just to connect to the site first for ...
-1
votes
0answers
25 views

Apache reverse proxy: Reset connection on request to numeric IP [duplicate]

I am running Apache as a reverse proxy, using mod_security, mod_evasive, & mod_proxy. ALL [valid] requests are serviced by vhosts using host headers and there is a default vhost defined to catch ...
0
votes
1answer
38 views

Mitigate DDos on Windows box [duplicate]

I would love to know, If you know some way to mitigate DDos/Dos attacks on Windows. In Linux we can Mitigate using the IPTables Almighty, but I wonder If there is something like that in Windows. I am ...
0
votes
0answers
66 views

How can I log and maybe even block IPs that send lots of incoming UDP traffic?

we run a voice / teamspeak server which receives legitmate traffic on port 9987 from many ips. Sometimes we get DDoSed. So people use single Servers and send 1-3 Gbits of UDP Floods to that port. This ...
1
vote
2answers
208 views

blocking udp attack ip with iptables [duplicate]

I was trying to block an ip of ( network stresser tool - a ddos websites selling ddos bots by seconds online ) the first one i was trying to block with iptables : iptables -A INPUT -d 173.193.26.73 ...
0
votes
1answer
177 views

iptables connection limit does not work on debian [duplicate]

I'm trying to set up some basic DOS protection. The following iptables rule works on a CentOS box but NOT on debian (wheezy). #limit the parallel http requests to 50 per class C sized network ...
-1
votes
2answers
193 views

Is it possible to prevent DDoS attacks? [closed]

I recently read that certain industries—including the one I work in—are more likely than others to be targeted by a DDoS attack. Can you give me some tips on how to prevent DDoS attacks?
1
vote
0answers
338 views

Curl Sourced DDoS: How to detect it & how to stop?

Okay, an Ubuntu server I manage fell victim to a DDoS attack today. Usually this is unpleasant but not that big a deal. A few high server load moments & then it passes. Today was clearly ...
0
votes
1answer
145 views

Attack from strange IP address, how to block?

Looking through the mail logs I've noticed a lot of these: Apr 7 11:33:25 s123456 pop3d: IMAP connect from @ [::ffff:192.96.206.9]checkmailpasswd: FAILED: web14p3 - short names not allowed from @ ...
0
votes
1answer
57 views

A botnet may be attacking our site right now, how should we respond? [duplicate]

Not sure if SO is the right forum, but we're in need of help and perhaps programmatic elements may comprise the final solution. Instead of downvoting, please recommend where to post this question, and ...
4
votes
2answers
100 views

Will MX records with a longer TTL help mitigate effects of DoS attack? [duplicate]

We have our email hosted at Google Apps, and have our DNS servers for the domain setup at Namecheap. About a month ago our website went down (not a big deal, since it's most just a contact info ...
0
votes
1answer
103 views

DDoS Attack Mitigation Techniques [duplicate]

Our hosting is set up on Amazon EC2 servers, which have been performing great. The problem we run into are spikes in requests for invalid URLs from scripts/bots looking for security holes. When ...

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