Showing posts with label Software. Show all posts
Showing posts with label Software. Show all posts

Wednesday, September 20, 2017

My Top Internet / Network Tools

There are lots of useful sites which helps the troubleshooting procedures. I listed some common tools or websites used by myself. Please let me know what you are using and I would like to try them and add them into this list.

1. Internet/Network Tools Portal
Ping – Shows how long it takes for packets to reach host
Traceroute – Traces the route of packets to destination host from our server
DNS lookup – Look up DNS record
WHOIS – Lists contact info for an IP or domain
Port check – Tests if port is opened on specified IP
Reverse lookup – Gets hostname by IP address
Proxy checker – Detects a proxy server
Bandwidth meter – Detects your download speed from our server
Network calculator – Calculates subnet range by network mask
Network mask calculator – Calculates network mask by subnet range
Country by IP – Detects country by IP or hostname
Unit converter – Converts values from one unit to another
DNS checks detailed dns information for a hostname ( www.facebook.com , www.yahoo.com , www.youtube.com )
IP-number checks ip number information such as dns reverse and forwards
route checks a specific routed prefix
AS numbers checks information on an AS-number
AS macros checks who belongs to an AS-macro

Thursday, May 18, 2017

Using Artica Squid Open Source Project to Build Powerful and Safe but Simple to Use Proxy

Looking for a pre-installed GUI based Proxy for a while and found Artica recently. The feature is pretty attractive and GUI interface looks cool.

What is Artica?
"Artica Proxy is an appliance that claim to manage Squid-cache proxy with all features that Squid Cache provides.With the Artica Web interface you can monitor, manage get statistics of your proxy service.
Artica Proxy provides ISOs in order to build a full proxy appliance without any technical skills.
Artica Proxy allows to enable Web filtering engine with more than 30.000.000 categorized websites.

Other features included such as reverse-proxy, RDP proxy, VPN, DHCP, DNS..."
Here are some my experience on it.

1. Download Link:
 http://artica-proxy.com/telechargements/

There are ISO, ESXi, Hyperv, Xen versions to download.

Saturday, October 29, 2016

Windows 10 Tips and Tricks

1. Install Telnet Client

Option 1 – From Control Panel

  1. Open “Control Panel“.
  2. Open “Programs“.
  3. Select the “Turn Windows features on or off ” option.
  4. Check the “Telnet Client” box.
  5. Click “OK“. A box will appear that says “Windows features” and “Searching for required files“.When complete, the Telnet client should be installed in Windows.

Wednesday, December 23, 2015

USB to Serial Cable Driver Issue on Windows 10

I have been using a Usb-to-Serial cable for many years without problem at windows xp and windows 7 system. Just recently upgraded to windows 10 , the cable does not work properly any more.

The Prolific USB-to-Serial Comm Port shows not working properly in the system Device Manager. There is a yellow exclamation mark next to my Prolific USB in device manager as shown below screenshots:
Device Status of the Device's Property shows:

Sunday, December 20, 2015

Firefox Warning Message -"This Connection is Untrusted" Caused by Proxy Server Certificate

I am getting the "This Connection Is Untrusted" message in Firefox for all security website using https even when I go to the Mozilla support page. Any secure site is viewed as an untrusted connection only in Firefox browser, but IE and Chrome are fine. The certificate is not trusted because the issuer certificate is unknown. Here is a screenshot when I tried to browse Google website from Firefox.


Sunday, December 6, 2015

Use Endpoint Sandbox Software to Protect Your Windows Computers

There are so many malicious websites, software and hackers in this cyber world which are aiming to get our information, hijack your computer or browsers. Even after you patched your computer, installed anti-virus/anti-spam/anti-spy/anti-bot/firewall/intrusion protection software on your computer, they will still find a way to come in to ruin your computer by alluring you click a link, open an attachment, or install a valid software.

Is there a way we could keep our computer completely free from those threats? No, the answer of course is no. But we could use some software provides from those security vendors to help us, such as  anti-virus/anti-spam/anti-spy/anti-bot/firewall/intrusion protection software. There is another different technology we could use too to exempt some kinds of those threats away from your computers.

I call it Sandbox Endpoint software. It use Sandbox technology to isolate the threats in certain scope. Once you completed your tasks, just close that scope to delete all trails left by those tasks. Recently i found some of them are pretty helpful and evaluated them in my personal computer:

1. Sandboxie Works at File System Level

This software has been recommended by LifeHacker as #1 Windows Utility:

"Let's admit it: sometimes, even though we know it's wrong, we all open the occasional sketchy program or file. We're not judging, but if you're going to do it, at least use protection. Enter Sandboxie, which lets you run programs independent of the rest of your system. That way they can't infect, access, or otherwise interfere with your Windows installation. It's also great for testing apps you aren't sure of or running multiple instances of an app that won't let you, so it's fun for the whole family."

Latest Sandboxie version is 5.06, which released on 23 October 2015. Now it supports windows 10. This small software installer is only 2.5MB and it is for Windows XP SP 3 through Windows 10 including 32-bit and 64-bit.

Basically Sandboxie runs your programs in an isolated space which prevents them from making permanent changes to other programs and data in your computer.


Saturday, November 28, 2015

Build WordPress Application Under Your Own Domain Name With Openshift and Cloudflare

Since 2011, Blogger is used to host my technical blog - http://51sec.blogspot.com. But during last a couple of years, wordpress is getting more and more popular and powerful. This post recorded the steps how to use Redhat Cloud Platform OpenShift with Cloud Service Company CloudFlare to build a wordpress site under your domain.

1. Register your plan at Openshift.com

OpenShift is built on OpenStack and Red Hat's open-source technologies. These include Red Hat
Enterprise Linux (RHEL), JBoss Enterprise Application Platform, and OpenShift Origin. OpenShift offers a choice of programming languages, frameworks, databases and development tools enabling you to get the job done, using the languages and tools you already know and trust. It provides free plan for 1G storage for each of at most three web application in the cloud at this moment.

Thursday, September 24, 2015

VanDyke SecureCRT Settings Tips

VanDyke SecureCRT provides  IT pros a very user-friendly client to manage command line devices and SSH hosts with. Connecting to devices securely is one thing, and there are other products that can achieve this goal, but with SecureCRT, multiple connections can be managed in tabs to allow you to work between sessions without changing windows.

Here are some my favourite settings to customize SecureCRT:
1. Edit Default Settings for terminal Emulation
If you are using Linux devices, please choose Linux as your Terminal. For network / security devices, use VT100 will be best choice.

I also like to set Scrollback Buffer to 5000. If you choose ANSI color, the appearance color will be depending on the color codes sent by the remote application.


Monday, August 17, 2015

Update to Windows 10 Immediately Without Wait Validating from Microsoft

One of my windows 7 laptop is still waiting Microsoft to validate my computer's specific but my another one has been notified and successfully automatically updated. After a couple of  weeks waiting, this weekend I lost patience and decided to find other ways to update my windows 7 to windows 10.

Validating Windows 10 for your PC

Saturday, January 3, 2015

Bypass China GFW

A website punches a hole at GFW. Add the website you want to surf after http://www.wallhole1.com. For examples:

2. xskywalker - 天行浏览器 - http://www.xskywalker.net/


3. Freegate - http://us.dongtaiwang.com/ or http://briian.com/6511/freegate.html

链接:http://pan.baidu.com/s/1qW7G6PA 密码:tll6
更新的链接:
链接:http://pan.baidu.com/s/1eQrfTOA 密码:gvf3 


Tools:

  • Website to real-time check if any website is blocked in China: Blocked in China

Reference:






Thursday, August 7, 2014

Tripwire Enterprise 8.3 Basic Configuration Steps


Tripwire Enterprise is a security configuration management suite whose Policy Management, Integrity Management, and Remediation Management capabilities stand-alone or work together in a comprehensive, tightly integrated SCM solution.
Five Key Features:
  • Change-triggered Configuration Assessment
  • World's Best File Integrity Monitoring
  • Achieve Continuous Compliance
  • Integrate SCM into IT Security Operations
  • Visualize and Report SCM Results to Communicate & Mitigate Risks

Tuesday, May 6, 2014

Free SNMP Software Suit in Windows Environment - Net-SNMP (Snmpv3 Support)

I was looking for this kind of software for a while. Mostly desktop and servers I am using are windows based. There is no Snmpwalk this kind of command under windows OS. Good things, there are always some genius to see the gap and develop some gorgeous tools to meet the needs from the people like me.

Net-SNMP is one of this kind of software. Based on their website - http://www.net-snmp.org/
"
Net-SNMP is a suite of applications used to implement SNMP v1SNMP v2c and SNMP v3 using both IPv4 and IPv6. The suite includes:
  • Command-line applications to:
    • retrieve information from an SNMP-capable device, either using single requests (snmpgetsnmpgetnext), or multiple requests (snmpwalksnmptablesnmpdelta).
    • manipulate configuration information on an SNMP-capable device (snmpset).
    • retrieve a fixed collection of information from an SNMP-capable device (snmpdfsnmpnetstatsnmpstatus).
    • convert between numerical and textual forms of MIB OIDs, and display MIB content and structure (snmptranslate).
  • A graphical MIB browser (tkmib), using Tk/perl.
  • A daemon application for receiving SNMP notifications (snmptrapd). Selected notifications can be logged (to syslog, the NT Event Log, or a plain text file), forwarded to another SNMP management system, or passed to an external application.
  • An extensible agent for responding to SNMP queries for management information (snmpd). This includes built-in support for a wide range of MIB information modules, and can be extended using dynamically loaded modules, external scripts and commands, and both the SNMP multiplexing (SMUX) and Agent Extensibility (AgentX) protocols.
  • A library for developing new SNMP applications, with both C and perl APIs.
"
There is a tutorial page at http://www.net-snmp.org/wiki/index.php/Tutorials .

Here I would like to list some usage from my person experience.

Thursday, April 3, 2014

Best Free Network Performance Test tool - Iperf

According to wikipedia Iperf "is a commonly used network testing tool that can create TCP and UDP data streams and measure the throughput of a network that is carrying them. Iperf is a modern tool for network performance measurement written in C++." So far it is best free software to test network throughput I found. 

1. Download iperf 2 from http://iperf.fr/.

2. Running on one of your remote machine from command line as iperf server (ip address 100.99.136.66).




C:\Tools>iperf -s

------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 8.00 KByte (default)
------------------------------------------------------------
[188] local 100.99.136.66 port 5001 connected with 100.94.200.14 port 48410
[ ID] Interval       Transfer     Bandwidth
[188]  0.0-10.0 sec   121 MBytes   101 Mbits/sec