With Securd, you can block access to specific websites, domains or networks.
Your Options on Blocking Sites with Securd
- Block at the host name level – Blocked access to a specific host name.
- Block at the domain level – Blocked domains including all sub domains.
- Block site at the network level – Block domains resolving to specific network or IP address.
How to Block access to a domain or host name
Step 1: Review your security policy
In the Securd policy editor, administrators need to be familiar with the active allow/block policies lists that are mapped to a security policy. Modifying the policy lists will be immediately applied to policy that is mapped to your sites, agents and browser deployment.
Step 2: Choose a custom block list to modify
Chose a domain list or a network list that you want to edit. Block lists are highlighted in red. You can also create a new list if you chose. Make sure the new list is mapped to a policy as in Step 1.
Step 3: Add assets to your block list
In the policy list editor, add a host name or domain that you wish to block or allow. In this example, we will block access to xyz.com. Since the policy is mapped to your default security policy (as displayed in Step 1), when you hit “Save” the domain will be immediately start to be blocked.
Step 4: Verify site blocking with a test.
To verify your policy list change, browse to the example xyz.com domain. Instead of being able to access the domain, you will be presented a Securd block page. The block page will also have a reason displayed why the page was blocked.
Do not test browse to known malicious websites or domains. It is better to perform a lookup at the DNS-level with dig ( Mac OS X and Linux) or nslookup (Microsoft Windows).
Blocking a network without the proper research can result in blocking innocent domains and disrupting access to trustworthy websites. When you choose to block an IP address or CIDR block, you should be aware if that network or IP space performs shared hosting. All the domains on that resolve to the block listed IP or network will be blocked!