Go Back   HowtoForge Forums | HowtoForge - Linux Howtos and Tutorials > ISPConfig 2 > Tips/Tricks/Mods

Do you like HowtoForge? Please consider supporting us by becoming a subscriber.
 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #1  
Old 3rd November 2006, 08:18
sysconfig sysconfig is offline
Junior Member
 
Join Date: Nov 2006
Location: (.)
Posts: 20
Thanks: 0
Thanked 0 Times in 0 Posts
Send a message via MSN to sysconfig
Default Enable TCP SYN Cookie Protection

A "SYN Attack" is a Denial of Service (DoS) attack that consumes all the resources on your machine, forcing you to reboot. Denials of Service attacks (attacks which incapacitate a server due to high traffic volume or ones that tie-up system resources enough that the server cannot respond to a legitimate connection request from a remote system) are easily achievable from internal resources or external connections via extranets and Internet. Enabling TCP SYN Cookie Protection will help to eliminate the problem.

Edit the sysctl.conf file (vi /etc/sysctl.conf) and add the following line:

Code:
# Enable TCP SYN Cookie Protection
net.ipv4.tcp_syncookies = 1
Once the configuration has been set, you must restart your network for the change to take effect.
The command to restart the network is the following:
Code:
 To restart all network devices manually on your system, use the following command:
[root:~ ]# /etc/rc.d/init.d/network restart
Reply With Quote
Sponsored Links
 

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Perfect Setup Suse 10 can send but not receive mail Grizzly HOWTO-Related Questions 33 7th March 2006 00:14
Postfix POP request approx 30 sec (Mozilla...) dreamed Server Operation 3 16th February 2006 01:03
Website users? ctroyp General 25 6th January 2006 19:02
pop3 login stefanr Installation/Configuration 10 2nd January 2006 11:08
mysql error at Stage 4 in Debian 3.1 drbista Installation/Configuration 14 11th November 2005 11:36


All times are GMT +2. The time now is 13:21.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.