A helper tool to transfer sniffer data from ConBee USB dongle to a Wireshark instance.

MQTT Explorer is a comprehensive MQTT client that provides a structured overview of your MQTT topics and makes working with devices/services on your broker dead-simple.

Visit some of our other Support 101 Pages created specifically to assist customers in answering questions and reach a faster resolution to QRadar topics. We continually work to add more content to deliver value to our customers. These topics can be accessed from any of the QRadar 101 pages top menu bar.

This is a nice question.

As a matter of fact, tcpdump is the first software found after the wire (and the NIC, if you will) on the way IN, and the last one on the way OUT.

Wire -> NIC -> tcpdump -> netfilter/iptables

iptables -> tcpdump -> NIC -> Wire
Thus it sees all packets reaching your interface, and all packets leaving your interface. Since packets to port 53 do not get a reply, as seen by tcpdump, you have successfully verified that your iptables rules have been correctly configured.

EDIT

Perhaps I should add a few details. tcpdump is based on libpcap, a library which creates a packet socket. When a regular packet is received in the network stack, the kernel first checks to see whether there is a packet socket interested in the newly arrived packet and, if there is one, it forwards the packet to that packet socket. If the option ETH_P_ALL is chosen, then all protocols go thru the packet socket.

libpcap implements one such packet socket with the option activated, keeps a copy for its own use, and duplicates the packet back onto the network stack, where it is processed by the kernel in the usual way, including passing it first to netfilter, the kernel-space counterpart of iptables. Same thing, in reverse order (i.e., first netfilter then last the passage thru the packet socket), on the way out.

Is this prone to hacking? But of course. There are certainly proof-of-concept rootkits using libpcap to intercept communications destined to the rootkit before the firewall can lay its hand on them. But even this pales in comparison with the fact that a simple Google query unearths working code hiding traffic even from libpcap. Still, most professionals think the advantages vastly outweigh the disadvantages, in debugging network packet filters.

Here are the credentials for an Online LDAP Test Server that you can use for testing your applications that require LDAP-based authentication. Our goal is to eliminate the need for you to download, install and configure an LDAP sever for testing. If all you need is to test connectivity and authentication against a few identities, you have come to the right place. If you find this useful or would like us to enhance/modify this test LDAP server, please leave a comment.

LDAP Server Information (read-only access):

Server: ldap.forumsys.com
Port: 389

Bind DN: cn=read-only-admin,dc=example,dc=com
Bind Password: password

All user passwords are password.

NAT64Check is a tool developed by the Internet Society in collaboration with Stichting IPv6 Nederland, Go6, SJM Steffann, Internetbureau Max and Simply Understand. This allows you to enter the URL of a particular website, and then run tests over IPv4, IPv6 and NAT64 in order to check whether the website is actually reachable in each case, whether identical web pages are returned, and whether all the resources such as images, stylesheets and scripts load correctly. It also compares responsiveness using the different protocols, therefore allowing network and system administrators to easily identify anything is ‘broken’, to pinpoint where any non-IPv6 compatible elements need to be fixed.

Support and Recovery Assistant is a new tool that helps users troubleshoot and fix issues with various Office 365 apps and services. The app diagnoses common Outlook issues like account setup, connectivity issues, password issues, or Outlook stops responding or crashes. To identify the root cause of these issues, the app runs checks such as:

Checks licenses
Verifying users’ credentials and that Office 365 servers are reachable
Checks for updates to Outlook clients
Checks authentication
Network checks
Protocol checks

Depending on the test results, the tool can offer to automatically fix problems for users or provide instruction on recommended solutions. All the diagnostics results are saved in a log file for users to share with their Office 365 admin or support engineers for further investigation.

RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp).
Results update in real-time as you type.
Roll over a match or expression for details.
Save & share expressions with others.
Use Tools to explore your results.
Browse the Library for help & examples.
Undo & Redo with Ctrl-Z / Y.
Search for & rate Community patterns.

Here's a collection of Web Services related tools for Windows, some of these support both PocketPC & Desktop variations of Windows.

Here's a collection of applications & developer tools for use with Salesforce.com, these are mostly for Mac OSX.

A helpful set network utilities for Windows operator and network administrators. All of the tools supports the following features:

Command line interface (CLI)
Designed for use in script/batch files
Ready for IPv4 and IPv6 networks
Windows XP – 10 compatible

SoapUI is the world's most widely-used open source API testing tool for SOAP and REST APIs. SoapUI offers SOAP Web Services functional testing, REST API functional testing, WSDL coverage, message assertion testing and test refactoring. With over 10 years of experience backed by a vast open source community, SoapUI is the de facto method for ensuring quality when developing APIs and Web Services.

Ldap Admin is a free Windows LDAP client and administration tool for LDAP directory management. This application lets you browse, search, modify, create and delete objects on LDAP server. It also supports more complex operations such as directory copy and move between remote servers and extends the common edit functions to support specific object types (such as groups and accounts).

You can use it to manage Posix groups and accounts, Samba accounts and it even includes support for Postfix MTA. Ldap Admin is free Open Source software distributed under the GNU General Public License.

Free PCRE-based regular expression debugger with real time explanation, error detection and highlighting.

Agent nodes can’t retrieve their configurations
    Is the Puppet master reachable from the agents?
    Do your agents have signed certificates?
    Do agents trust the master’s certificate?
    Can agents reach the filebucket server?

Some common issues that can prevent the different parts of Puppet Enterprise from communicating with each other.

An open-source x64/x32 debugger for windows.