Showing posts with label tips and tricks. Show all posts
Showing posts with label tips and tricks. Show all posts
Thursday, December 26, 2013
Monday, May 16, 2011
Cacti : Tips
Q: I just installed Cacti and all of my graphs appear as broken images.
A: If all of your settings appear correct, try running poller.php manually by cd'ing to Cacti's directory and typing:
# php poller.php
Refer : http://www.cacti.net/downloads/docs/html/faq.html#AEN2409
Friday, February 11, 2011
Install GNOME on Centos/RH/FC
# yum groupinstall “X Window System” “GNOME Desktop Environment”
Monday, February 7, 2011
Install Adobe Flash Player on CentOS 5.5 and Red Hat (RHEL) 5.5
Install Adobe YUM Repository RPM package
CentOS and Red Hat 32-bit version (i386)
#rpm -ivh http://linuxdownload.adobe.com/adobe-release/adobe-release-i386-1.0-1.noarch.rpm
#rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-adobe-linux
#yum check-update
CentOS and Red Hat 32-bit version (i386)
#yum install flash-plugin nspluginwrapper curl
Wednesday, July 16, 2008
rDNS
rDNS - Reverse DNS lookup (rDNS) is a process to determine the hostname or host associated with a given IP address or host address. (wikipedia).
Any want of you facing the problem, unable to lookup your rDNS for your DNS server?.I also got this problems with my rDNS lookup. After a few day seek for the solutions how to make sure the rDNS work properly, finally i found the solution. Any local/public IP from Telekom Malaysia (TM), must ask from their site to enable the rDNS.By default they not allowed the rDNS if we are not request it.To request it we can email : dnsteam@tm.net.my / dndadm@tmnet.com.y or lock report to iCOMS.After do want of this method, finally my rDNS work properly. So far their respond better.
Any want of you facing the problem, unable to lookup your rDNS for your DNS server?.I also got this problems with my rDNS lookup. After a few day seek for the solutions how to make sure the rDNS work properly, finally i found the solution. Any local/public IP from Telekom Malaysia (TM), must ask from their site to enable the rDNS.By default they not allowed the rDNS if we are not request it.To request it we can email : dnsteam@tm.net.my / dndadm@tmnet.com.y or lock report to iCOMS.After do want of this method, finally my rDNS work properly. So far their respond better.
Friday, April 6, 2007
Advanced SSH security tips and tricks
The SSH server configuration file is located in /etc/ssh/sshd_conf. You need to restart the SSH service after every change you make to that file in order for changes to take effect.
Change SSH listening port
By default, SSH listens for connections on port 22. Attackers use port scanner software to see whether hosts are running an SSH service. It's wise to change the SSH port to a number higher than 1024 because most port scanners (including nmap) by default don't scan high ports.
Open the /etc/ssh/sshd_config file and look for the line that says:
Change the port number and restart the SSH service:
Change SSH listening port
By default, SSH listens for connections on port 22. Attackers use port scanner software to see whether hosts are running an SSH service. It's wise to change the SSH port to a number higher than 1024 because most port scanners (including nmap) by default don't scan high ports.
Open the /etc/ssh/sshd_config file and look for the line that says:
Port 22Change the port number and restart the SSH service:
/etc/init.d/ssh restart
Subscribe to:
Posts (Atom)