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Archive for September, 2009


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DDOS Attack

Friday, September 25th, 2009

if you have any problem about DDos attack or not understand what mean DDos  attack, then jist go to this URL

http://www.linuxsecurity.com/content/view/121960/49/

added bye AYAD

for more info.   zooea@yahoo.com

ip_conntrack

Friday, September 25th, 2009

ip_conntrack: table full, dropping packet.

How do I fix this error?

A. If you notice the above message in syslog, it looks like the conntrack database doesn’t have enough entries for your environment. Connection tracking by default handles up to a certain number of simultaneous connections. This number is dependent on you system’s maximum memory size.

You can easily increase the number of maximal tracked connections, but be aware that each tracked connection eats about 350 bytes of non-swappable kernel memory!

To print current limit type:
# sysctl net.ipv4.netfilter.ip_conntrack_max
Output:

8192

To increase this limit to e.g. 12000, type:
# sysctl -w net.ipv4.netfilter.ip_conntrack_max=12000
Alternatively, add the following line to /etc/sysctl.conf file:
net.ipv4.netfilter.ip_conntrack_max=12000
The following will tell you how many sessions are open right now:
# wc -l /proc/net/ip_conntrack
Output:

5000 /proc/net/ip_conntrack

Redirct to other domain in Linux

Thursday, September 3rd, 2009

how to redirct domain to another domain

we put this code inside .htaccess
===============================================
=redirectMatch 301 ^(.*)$ http://www.domain.com=
===============================================

refer to this website  http://www.isitebuild.com/301-redirect.htm

database error ( table crashed or dublicate database)

Thursday, September 3rd, 2009

if you got error in your website,,database error (table crashed) that mean you need to go to the database table and repair it, because the table have dublicate data or some thing wrong,

how to repair table,  if you have linux with cpanel,,, you need to login cpanel and repair the table from the place that you used to create database in your cpanel or if you have windows 2003,,, you can repair the time by accessing to the phpmyadmin throguh this URL    serverip/phpmyadmin  ex. 192.168.43.33/phpmyadmin  and sure u will have login detals,,, then from there u can repair the table

by Ayad

Spam with mail enable windos 2003

Thursday, September 3rd, 2009

MTA his work to fillter messgae if have spam,, all the meessage will come to SMTP.. coz his work recive massge

MTA will connectt with SMTP to fillter spam massge before go to costomer

in order to make connection bettwen SMTP and MTA we shoud go to (ME spam C) in the programs,,,,then we check the connection

if no connection then we go to MX uptime ==Mxspam in the programs then we stop the service and we strart after that we go back to
MEspamc then we check the connection ,,we will see the connection is ok,,and we go to mespamc ==contct filtering then we make redirct
message 6 ,,that mean if spam more than 6 we should send it to this folder(u can see the folder down in the redirction page.

by Ayad

how to redirct webmail

Thursday, September 3rd, 2009

we need to go to control panel and we add subdomian  webmail.alzwea.com

then after that we go to RDC to the server and we go to IIS

then we go website then we refresh and we search about    webmail.alzwea.com

then right click on it then (proprites) then we selet (home dirctory) then we tick a dirction to URL
then we put the working url we want to redict to it then we tick (exect URL enterd above)
and we tick (perminint redircion for this
resource)

then apply then ok

now done

by Ayad

Check memory used Linux command

Thursday, September 3rd, 2009

df -h

all under /root/cprestore can be remove to help increase the memorey