The DNS proxy is a proxy server that intercepts DNS queries and answers them, without the need to contact a remote DNS server each time it is necessary to resolve an IP address or a hostname. When a same query is often repeated, caching its results locally may sensibly improve performances. The available settings for the DNS proxy are grouped into three tabs.
A few options for the DNS proxy can be configured in this page.
Enable the DNS proxy as transparent on the GREEN, BLUE, and ORANGE zone, respectively. They appear only if the corresponding zones are enabled.
Specific sources and destinations can be set up to bypass the proxy by filling in their values in the two text areas.
Allow the sources under the corresponding text area not to be subject to the DNS scanning. The sources can be specified as IP addresses, networks, or MAC addresses.
Allow the destinations under the corresponding text area not to be subject to the DNS proxy scanning. The destinations can be specified as IP addresses or networks.
Changed in version 2.5: Renamed from ‘Custom Nameserver’
This page allows the management of custom domain - nameservers pairs. In a nutshell, whenever a sub-domain of a domain is queried, the corresponding nameserver in the list will be used to resolve the domain into the correct IP address.
A new domain - nameserver combination can be added by clicking on the Add new custom nameserver for a domain link. When adding an entry, a few values can be entered for the various options available:
The domain for which to use the custom nameserver.
The IP address of the nameserver.
An additional comment.
On each domain in the list, these actions can be carried out:
- edit the rule.
- delete the rule.
Changed in version 2.5-2013-January: the DNS blacklist.
This page presents configuration options about the reaction of the Endian 4i Edge Appliance when asked to resolve a domain name that is known to be either used to propagate spyware or that serves as phishing site. The options that can be set are:
The requests are redirected to localhost. In other words, the remote site will neither be contacted nor reachable.
Domain names that are entered here are not treated as spyware targets, regardless of the list’s content.
Domain names that are entered here are always treated as spyware targets, regardless of the list’s content
The update frequency of the spyware domain list. Possible choices are Daily, Weekly, and Monthly. By moving the mouse cursor over the respective question mark, the exact time of the update execution is shown.
Hint
to download updated signatures, the system must be registered to Endian Network.
Note
Older version of the anti-spyware module used a different engine to block DNS requests, therefore another option was available:
When this option is enabled, the requests are redirected to the spyware listening post instead of localhost, providing useful information to the companies that fight malware and spyware. For more information, follow the link that is shown on the GUI.