<div>
<div class="content wysiwyg-content">
Hi All,<br />
<br />
I have a problem with iptables.<br />
<br />
Can you help me understand the difference between --update and --rcheck?<br />
<b>Give me an example, please.</b><br />
<br />
Thanks in advance.
</div>
</div>


Hi All,

I have a problem with iptables.

Can you help me understand the difference between --update and --rcheck?
Give me an example, please.

Thanks in advance.

Difference between --update and --rcheck

Software firewalls, also known as host-based firewalls, provide a layer of software on one host that controls network traffic in and out of that single machine. Most operating systems now include firewall software, but many available software firewalls include central distribution, antivirus systems and disaster recovery.

Software Firewalls

The Linux operating system, in all its flavors, has its own share of security flaws that allow intrusions, but there are various mechanisms by which these flaws can be removed, generally divided into two parts: authentication and access control. Authentication is responsible for ensuring that a user requesting access to the system is really the user with the account, while access control is responsible for controlling which resources each account has access to and what kind of access is permitted.

Linux Security

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.