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SonicOS 5.8.1 Administrator Guide
Reverse Name Resolution
The Reverse Name Resolution tool is similar to the DNS name lookup tool, except that it looks
up a server name, given an IP address.
Enter an IP address in the Reverse Lookup the IP Address field, and it checks all DNS servers
configured for your security appliance to resolve the IP address into a server name.
Connection Limit TopX
The Connection Limit TopX tool lists the top 10 connections by the source and destination IP
addresses. Before you can use this tool, you must enable source IP limiting and/or destination
IP limiting for your appliance. If these are not enabled, the page displays a message to inform
you that you can enable them on the Firewall > Advanced page.
Check GEO Location and BOTNET Server Lookup
The Geo-IP and Botnet Filtering feature allows administrators to block connections to or from
a geographic location based on IP address, and to or from Botnet command and control
servers. Additional functionality for this feature is available on the Security Services > Geo-IP
and Botnet Filter page. For full details, see “Security Services > Geo-IP Filter” on page 1262.
MX Lookup and Banner Check
The MX Lookup and Banner Check tool allows you to look up a domain or IP address. Your
configured DNS servers are displayed in the DNS Server 1/2/3 fields, but are not editable. After
you type a domain name, such as “google.com” into the Lookup name or IP field and click Go,