Today (Saturday) We will make some minor tuning adjustments to MySQL.

You may experience 2 up to 10 seconds "glitch time" when we restart MySQL. We expect to make these adjustments around 1AM Eastern Daylight Saving Time (EDT) US.

DDOS attack please help!

Login or Register to Reply

Thread Tools Search this Thread
# 8  
Is it a SYN flood attatack?

I found net.ipv4.tcp_syncookies helped for my servers, and I would use
ip route add blackhole x.x.x.x

and in our case the attacker would get bored.

Not too clever but OK as a quick emergency fix.
Login or Register to Reply

Thread Tools Search this Thread
Search this Thread:
Advanced Search

5 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Anti ddos shell script, is it useful?

Hi guys, just need a opinion from you. I found anti ddos script from github Script What is your opinion about it? Is it usefull? Do you have some similar? I want to protect my servers on all levels, why not in the servers via script. I assume I must fix this script to be useful for me, but... (1 Reply)
Discussion started by: tomislav91
1 Replies

2. Cybersecurity

DDoS and brute force attack

How to protect DDoS and brute force attack. I want to secure my server and block attacker. (1 Reply)
Discussion started by: romanepo
1 Replies

3. Cybersecurity

DDoS Simulation Tools

are there any popular DDoS simulation tools to test my own infrastructure? Anyone tried to setup all these in AWS EC2? (1 Reply)
Discussion started by: boriskong
1 Replies

4. Cybersecurity

Network attack - so what?

In my logs I find entries about attacks on my system. I know IP addresses, I know date and time and I know what they tried to do. So what's the best I can do now? Tell everybody that there are cybercriminals on that network? Write an email to their admin? Anything else? (10 Replies)
Discussion started by: Action
10 Replies

5. Cybersecurity

what is the better way to protect my server from DDos Attack

heloo today i have DDos Attack in my server what is the better way to secure my server from DDos Attack i use CentOS 4&5 i try every firewall and talk to softlayer - iweb i've Tried every possible solutions but I can not find a solution to the problems Give Me The best way plzz (4 Replies)
Discussion started by: a7medo
4 Replies
HASH_EQUALS(3)								 1							    HASH_EQUALS(3)

hash_equals - Timing attack safe string comparison

bool hash_equals (string $known_string, string $user_string)
Compares two strings using the same time whether they're equal or not. This function should be used to mitigate timing attacks; for instance, when testing crypt(3) password hashes.
o $known_string - The string of known length to compare against o $user_string - The user-supplied string
Returns TRUE when the two strings are equal, FALSE otherwise.
/EXCEPTIONS Emits an E_WARNING message when either of the supplied parameters is not a string.
Example #1 example <?php $expected = crypt('12345', '$2a$07$usesomesillystringforsalt$'); $correct = crypt('12345', '$2a$07$usesomesillystringforsalt$'); $incorrect = crypt('apple', '$2a$07$usesomesillystringforsalt$'); var_dump(hash_equals($expected, $correct)); var_dump(hash_equals($expected, $incorrect)); ?> The above example will output: bool(true) bool(false)
Note Both arguments must be of the same length to be compared successfully. When arguments of differing length are supplied, FALSE is returned immediately and the length of the known string may be leaked in case of a timing attack. Note It is important to provide the user-supplied string as the second parameter, rather than the first. PHP Documentation Group HASH_EQUALS(3)

Featured Tech Videos