We have long wondered why some of the more harmful webpages are not blocked more easily using DNS, and we finally found a system that does it for us. Securing your devices using DNS may sound like an odd concept, but read on to find out more. You can now improve your Internet Security & Privacy In a Few Easy Steps
dns9.quad9.net is a great free service that blocks many bad things from talking to your computers and other devices. Alot of the viruses people get come from either webpages or email and use DNS to talk to their command and control (C&C) server(s). Quad9 provides Internet Security & Privacy In a Few Easy Steps
dns9.quad9.net will allow you to block all harmful webpages and many other things without you even being aware of it.
If your unsure what DNS is, its the Domain Name System. in other words, its the domain name of the site (such as securetech.com.au) which resolves into an IP address of “188.8.131.52”. which one is easier to remember?
How to setup ASTARO (now sophos) UTM to authenticate with windows server 2003 through RADIUS. Step-by-step guide to getting it running.
Step 1 – Add a usergroup to Authenticate against
Open Computer Management (Start/All Programs/Administrative Tools/Computer Management),
Add a new Usergroup and give it a descriptive and helpful name (I suggest something like “Gateway Users”).
Step 2 – Add users to your group
Within Computer Management (System Tools/Local Users and Groups/Users), create users (if necessary)
Right click on a user and select Properties
Under the Member Of tab, add the group that you created in Step 1 (eg “Gateway Users”)
Do Not close Properties dialog box, go to step 3.
Step 3 – Configure Dial-in access
Within Properties dialog box, click on the Dial-in tab.
choose “Allow Access” under Remote Access Permission (Dial-in or VPN)
Save and close the Properties dialog box.
Step 4 – Alter Group Policy for password encryption
Within Active Directory Users and Computers, right click on your domain name and chose properties
Within the Domain Properties dialog box click Group Management tab
Highlight the Default Domain Policy and select “edit”
In the GPO Editor, navigate to Computer Configuration/Windows Settings/Security Settings/Account Policies/Password Policy
Make sure Store passwords using reversible encryption is enabled
Save and close all dialog boxes
Step 5 – Add a client to the IAS RADIUS server
Open IAS (Start/All Programs/Administrative Tools/Internet Authentication Server)
Right click on RADIUS Clients then chose New RADIUS Client
Gave the Client a friendly name of ASG and an IP address
Chose RADIUS Standard Vendor-Client and input a shared secret (note: will need to input this on the ASG, so write it down)
Step 6 – Create a new Remote Access Policy
Within IAS, right click on Remote Access Policies and Choose New Remote Access Policy
In the wizard, Choose Set Up Custom Policy and give the policy a descriptive name
Select the NAS-Identifier policy condition and give the NAS ID of pptp (lowercase)
Select the Windows-Groups policy condition as well and add the group specified in Step 1
Choose Grant Remote Access
Edit the profile to include CHAP on the Authentication tab (You can include PAP as well, but this is an insecure method)
Save and close all configurations on the Active Directory server
Step 7 – Configure the ASG
Navigate to Definitions & Users/Authentication Servers/Servers
Add the server, service port (keep default unless absolutely certain) and shared secret from Step 5
Save the configuration
You are now done with the configuration. In a few minutes, at most, you should be able to use the UTM to authenticate with windows using the RADIUS server facilities. If there is an issue where authentication continually fails, most likely there is a setting on the AD server that needs to be adjusted.
If you wanted to get fancy, you could do the following:
Setup a Group for each part of the ASTARO Secure Gateway components (such as Proxy, VPN, Webadmin, etc)
Setup a Remote Access Policy which mimicks the above, while adding “NAS-Identifier” as an extra step. ASTARO sends a unique identifier for each part, so you can setup groups within windows to authorise access to whatever you want, and then you no longer need to edit users at the ASG Web Admin.
This requires setting up “Automatic User Creation” (Definitions & Users/Authentication Servers/Global Settings).
Use the Test feature of the Edit Authentication Server Page to check if the UTM authenticates with windows and therefor the user is getting authorisation.
Use the Event viewer on the server to check the “System” Logs, Failed Logon events will show further details here (as long as ASG is setup with the correct server details.
This was created in a hope that others can get more information, and not have to spend as much time as we did, tracking down issues and piecing everything together (not being an expert on RADIUS Authentication).
If you need help with this or other firewalls, please contact us.
RJ45 Cross Over Cable 10baseT RJ45 Male RJ45 Male 1__________3 2__________6 3__________1 6__________2 ______________________________________
RJ45 100base-T4 Crossover male to male Name______Pin__Pin__Name TX_D1+____1____3____RX_D2+ TX_D1-____2____6____RX_D2- RX_D2+____3____1____TX_D1+ RX_D2-____6____2____TX_D1- BI_D3+____4____7____BI_D4+ BI_D3-____5____8____BI_D4- BI_D4+____7____4____BI_D3+ BI_D4-____8____5____BI_D3
It’s important that each pair is kept as a pair. TX+ & TX- must be in the pair, and RX+ & RX- must together in another pair etc. (Just as the table above shows).