CSF Advanced Allow/Deny Filters
In /etc/csf.allow and /etc/csf.deny you can add more complex port and ip filters using the following format (you must specify a port AND an IP address):
tcp/udp|in/out|s/d=port|s/d=ip|u=uid
Broken down:
tcp/udp : EITHER tcp OR udp OR icmp protocolin/out : EITHER...
Tuesday, October 29, 2013
Saturday, October 19, 2013
Making a loadbalancer with CentOS using Linux Virtual Server
When you are new to all terminology Red Hat is using, it can be challenging to understand what actions to take to create a simple load-balancer with Linux. Here is some information to get you started.
Read...
Monday, October 14, 2013
Install SVN (Subversion) Server on Fedora 19/18, CentOS/Red Hat (RHEL) 6.4/5.9
What is SVN (Subversion)?
Subversion is a free/open-source version control system. Subversion manages files and directories, and the changes made to them, over time. This allows you to recover older...
Linux history command(change HISTSIZE variable)
History is a very handy command to see what was typed and executed in a shell for a period of time.
For example, you are troubleshooting Linux server and you want to see the last 20 commands executed.
$ history 20
Or you want to find all commands with sudo word in them.
$ history | grep sudo
You...
ĐỒNG BỘ HÓA THỜI GIAN GIỮA CÁC SERVER LINUX - NTP (NETWORK TIME PROTOCOL)
Giao thức NTP (Network Time Protocol - Giao thức đồng bộ thời gian mạng) là một giao thức để đồng bộ đồng hồ của các hệ thống máy tính thông qua mạng dữ liệu chuyển mạch gói với độ trễ biến đổi. Giao thức này được thiết kế để tránh ảnh hưởng của độ trễ biến đổi bằng cách sử dụng bộ đệm jitter. NTP cũng...