Archive for September, 2009
Prevent DDOS Attack
13 years ago
by Dhillon
in Server Admin
Prevent DDOS Attack (D)DoS-Deflate script monitors and tracks the IP addresses that are sending and establishing large amount of TCP network connections. When it detects number of connections from a single IP that exceeds certain preset limit, the script automatically uses APF or IPTABLES to ban and block the IPs.
Installation:
wget http://www.inetbase.com/scripts/ddos/install.sh chmod 0700 install.sh ./install.sh
UnInstall:
GD Star Ratingloading...wget http://www.inetbase.com/scripts/ddos/uninstall.ddos chmod 0700 uninstall.ddos ./uninstall.ddos
.htaccess Bad Bot Block
03 years ago
by Dhillon
in Server Admin
.htaccess Bad Bot Block
GD Star Ratingloading...ErrorDocument 403 /403.html SetEnvIfNoCase ^User-Agent$ .*(useragent1|useragent2|useragent3) BADBOT SetEnvIfNoCase ^User-Agent$ .*(useragent4|useragent5|useragent6) BADBOT SetEnvIf remote_addr xx.xx.xx.xx BADBOT Deny from env=BADBOT
Free up Linux memory
03 years ago
by Dhillon
in Server Admin
Free Clear Purge System memory ( RAM ) in Linux.
Its best to leave the memory management to linus kernel but if you must clear up some memory then this is how you do it. Execute this command as root:
sync; echo 3 > /proc/sys/vm/drop_caches
What does it do ? sync; will write all the unwritten data to disk so that nothing is lost. echo 3 > /proc/sys/vm/drop_caches; will drop all the cached data from memory.
GD Star Ratingloading...WordPress vs vBulletin
13 years ago
by Dhillon
in Server Admin
WordPress vs vBulletin
It will be like comparing apples with oranges as one is a Blog Script and other is Forum. But both the scripts are based on similar technologies ( php/mysql) and there are some similar features.
WordPress’ look and feel is more in liaison with 2008/2009 technologies, vbulletin comparably looks outdated.
The installation, up-gradation, out of the box ‘SEO’, performance, adding plugins , changing skins and overall look and feel is much better in wordpress, pity wordpress doesn’t have a forum solution.
GD Star Ratingloading...Putty Commands
03 years ago
by Dhillon
in Server Admin
Putty Commands
ls – to list files in a directory syntax: ls
dir – same as ls syntax: dir
cd – change directory syntax: cd /home cp – copy a file syntax: cp file.zip /home
mv – move a file (also used to rename files) syntax to move : file.zip /home syntax to rename : oldfile.zip newfile.zip
rm – remove a file syntax to remove one file : rm file.zip syntax to remove all zip files : rm *.zip syntax to remove all files : rm -rf * syntax to remove a directory : rm -rf directoryname
mkdir – make directory syntax: mkdir newdirectory
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