Linux Configure Firewall

Today, open source firewalls are numerous. 　　This article will cover 10 of the most practical open source firewalls that fit your business needs. 1. Iptables Iptables/netfilter is the most popular command line based on firewalls. It is the safe line of defense for Linux servers. Many system administrators use it to fine-tune the server. The function is to filter packets from the network stack in the kernel, including: listing the contents of the packet filtering rule set, and executing fast because it only checks the header of the packet, and the administrator can ...

In the http://www.unixbar.net/see the use of monitoring Treasure monitor server, feel good, on the installation of a configuration, the following describes the specific installation Method! Monitoring treasure using the standard SNMP protocol to provide users with server monitoring, which means that the monitored server must run the SNMP agent (SNMPD), then we will detail how to install, open the SNMP agent on the Linux server, and make the necessary security configuration, Nginx monitoring and server i/o,cpu load, ...

The proxy server is widely used in the current http://www.aliyun.com/zixun/aggregation/16327.html > network environment and plays an important role in the Internet. 　　Today I would like to introduce a Linux environment to set up a proxy server method, I hope to be able to help you friends. Introduction to Proxy server before setting up, let us first understand the characteristics of the proxy server. We have to understand the agency clothing ...

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Enterprise operation and maintenance job interview: How to prevent the Linux server in the Trojan? (A) to answer the strategy to business interviews there are many competitors, so pay attention to the dimensions and height of the answer, we must immediately spike competitors, get high-paying offer. (B) Answer Tactics Trojans are often malicious Linux Under the way through the Web to upload the directory to upload Trojans to the Linux server, according to the malicious Web site to start -> Linux -> HTTP Services -> Middleware Services -> Program Code ...

It must be understood that vncserver, when invoked, will enable the server-side listening port based on your configuration, with the port default starting from 5900, plus your desktop number. For example, if your desktop number is 1, then VNC's connection port number is 5900+1=5901 For example, your desktop number is 10000, then VNC's connection port number is 5900+10000=15900 ===================================== ===================...

Using Linux to do PXE installation system appears pxe-e32:tftp open timeout find PXE boot chip error code table, is that TFTP did not run PXE-E32:TFTP Open timeout tftp "Open" request did not answer, 　　Verify that the TFTP service is running. Restart the XINETD service, and determine whether the port is listening, or the problem [Root@localhos ...

Fedora Linux allows you to install the operating system via the http://www.aliyun.com/zixun/aggregation/18415.html > network connection using the Kickstart server. Faster than using CDs and can be automated. The process is fairly simple: Connect a new server (client) to a preloaded installation file server (installation service side) to the same network. Boot on the client with a dedicated boot CD. Choose the preferred installation method (FT ...).