Spam is a nuisance, and as bloggers, we have all experienced a flood of spam every now and then. Not only is it a pain, but it can slow down your blog and use up your resources. In this post we’ll look at ten ways to combat spam. 1. Install Akismet This is the simple [...]
Here are some basic steps to secure Apache Web Server IMPORTANT NOTE: These suggestions may vary from server to server and modify the values as per your server configurations. It is up to you to determine if any of the changes suggested here are not compatible with your requirements. 1. Hide the Apache Version number, [...]
CODE Banning an IP iptables -A INPUT -p all -s IPHERE/32 -j DROP CODE Unbanning and IP iptables -D INPUT -p all -s IPHERE/32 -j DROP CODE Listing the last five ip’s with the most connections netstat -atnp -A inet | grep “:80″ | awk -F ” ” ‘{print $5} ‘ | awk -F “:” [...]
By default remote access to MySQL database server is disabled for security reasons. However, some time you need to provide remote access to database server from home or a web server. If you want to remotely access to the database server from the web server or home, follow this quick tutorial. MySQL Remote Access You [...]
Spoofing and bad address attack tries to fool the server and try to claim that packets had come from local address/network. Following IP/netwok address are know to open this kind of attack: Incoming source IP address is your servers IP address Bad incoming address from following ranges: => 0.0.0.0/8 => 127.0.0.0/8 => 10.0.0.0/8 => 172.16.0.0/12 [...]
Sometime it is necessary to block incoming connection or traffic from specific remote host. iptables is administration tool for IPv4 packet filtering and NAT under Linux kernel. Following tip will help you to block attacker or spammers IP address. How do I block specific incoming ip address? Following iptable rule will drop incoming connection from [...]
IP aliasing is the process of assigning more than one IP address to a network interface. This is useful for Apache web server virtual hosting or other network servers such as ftp server. This tutorial explains how to assign one or more IP address to a single network interface under FreeBSD operating system. It is [...]
This tutorial shows how to combine four single storage servers (running CentOS 5.4) to one large storage server (distributed storage) with GlusterFS. The client system (CentOS 5.4 as well) will be able to access the storage as if it was a local filesystem. GlusterFS is a clustered file-system capable of scaling to several peta-bytes. It [...]
/etc/defaultrouter is the configuration file for default router under Solaris os. The /etc/defaultrouter file can contain the IP addresses or hostnames of one or more default routers, with each entry on its own line. If you use hostnames, each hostname must also be listed in the local /etc/hosts file, because no name services are running [...]
qmail is a mail transfer agent that runs on Linux and Unixish oses. It is more secure replacement for the popular Sendmail program. Yes, it is possible to bind Qmail to specific IP. Here is what I did. Please note that I am running light weight QMAIL server from xinetd service. 1) Open your /etc/xinetd.d/smtp [...]
