Please whitelist cPanel in your adblocker so that you’re able to see our version release promotions, thanks!

The Community Forums

Interact with an entire community of cPanel & WHM users!
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

DDoS attack

Discussion in 'Security' started by Zion Ahead, Oct 28, 2009.

  1. Zion Ahead

    Zion Ahead Well-Known Member

    Joined:
    Nov 10, 2006
    Messages:
    347
    Likes Received:
    0
    Trophy Points:
    166
    Two nights in a row I had to reboot the server.

    I checked /var/log/messages and found this right before reboot, where the server was pinging on/off and load was high.

    Is this a ddos attack?


    **

    Oct 28 02:52:22 server kernel: Firewall:
     
    #1 Zion Ahead, Oct 28, 2009
  2. Zion Ahead

    Zion Ahead Well-Known Member

    Joined:
    Nov 10, 2006
    Messages:
    347
    Likes Received:
    0
    Trophy Points:
    166
    Anyone please?
     
    #2 Zion Ahead, Nov 2, 2009
  3. Infopro

    Infopro cPanel Sr. Product Evangelist
    Staff Member

    Joined:
    May 20, 2003
    Messages:
    15,679
    Likes Received:
    299
    Trophy Points:
    433
    Location:
    Pennsylvania
    cPanel Access Level:
    Root Administrator
    Twitter:
    I don't want to make light of this, someone else will comment hopefully with better advice too, I'm sure, but I see this sort of thing often in my logs. If you suspect it's an attack that's causing huge loads on the server, contact your provider for assistance, or hire an expert. Don't go it alone wondering what if...

    Some reading here:
    WWW Security FAQ: Securing Against Denial of Service Attacks

    Do you have CSF installed and configured to block permanantly, attacking IPs?

    Checking var/log/messages isn't the best way to go I don't think.
     
    #3 Infopro, Nov 2, 2009
  4. EricGregory

    EricGregory Accounts Manager
    Staff Member

    Joined:
    Nov 27, 2002
    Messages:
    124
    Likes Received:
    1
    Trophy Points:
    243
    Location:
    Pennsylvania
    cPanel Access Level:
    DataCenter Provider
    I second what InfoPro stated. If you believe your server is getting DoS'd you should contact the datacenter that houses it to ask them to evaluate the situation. It's not something that you should mess around with and wonder about :)
     
    #4 EricGregory, Nov 4, 2009
  5. Spiral

    Spiral BANNED

    Joined:
    Jun 24, 2005
    Messages:
    2,023
    Likes Received:
    8
    Trophy Points:
    193
    Yes does look like an attack ...

    You should take a deeper look at that and given that someone is interested in your server, you may want to also do a full review of your current security and make sure you are properly secured and hardened.

    I certainly would be glad to give you a hand with that :)

    "Death to Hackers" comes only slightly after "Death to Stupidity"
     
    #5 Spiral, Nov 11, 2009
  6. Spiral

    Spiral BANNED

    Joined:
    Jun 24, 2005
    Messages:
    2,023
    Likes Received:
    8
    Trophy Points:
    193
    Your data center may be able to filter out the false traffic at their routers before it reaches your server and this might help you get better grips on this thing.

    Beyond that you probably want to thoroughly review the security on your server and make sure you are up to par where you should be.
     
    #6 Spiral, Nov 16, 2009
(You must log in or sign up to post here.)
Loading...
Similar Threads - DDoS attack
  1. Mehrdad Tari

    Solutions for handling ddos attacks?

    Mehrdad Tari, Jul 9, 2017, in forum: Security
    Replies:
    3
    Views:
    226
    postcd
    Aug 19, 2017
  2. 007basaran

    EA4 - Mod_evasive - Nginx Proxy - Layer 7 DDOS Attacks

    007basaran, Feb 28, 2017, in forum: Security
    Replies:
    19
    Views:
    1,205
    cPanelMichael
    Apr 7, 2017
  3. Ahmed Hany

    Protect server from DDOS attacks

    Ahmed Hany, May 25, 2016, in forum: Security
    Replies:
    1
    Views:
    980
    cPanelMichael
    Jun 1, 2016
  4. meeven

    Configure mod_request_timeout and mod_qos to mitigate slow HTTP ddos attacks

    meeven, Oct 12, 2015, in forum: Security
    Replies:
    3
    Views:
    1,122
    cPanelMichael
    Oct 14, 2015
  5. postcd

    How do you mitigate Apache DDoS on one domain index page?

    postcd, Oct 29, 2016, in forum: Security
    Replies:
    1
    Views:
    403
    cPanelMichael
    Oct 31, 2016

Share This Page