Informer does not have the ability to search through its past reports. Those reports exist and are stored locally on the IIS server- under wwwroot, nwreporterweb, results- but it is not in a searchable format. So if you are looking for something specific- say a known malicious IP address and you wanted to know if it was listed on a prior report, you have to click through each day's reports and hope you get lucky. This is not a workable way to find something.
I recently joined a group that has a year's worth of past reports sitting on their Informer system, and I know there is some good intelligence stored in those reports. How could I get those old reports indexed and searchable?
IIS used to be able to add a local directory to an indexing service, but Microsoft doesn't really support that in IIS 7. I spent a couple of days trying to cobble together a generic search application for ASP.net, and had mixed results. I also crippled our Informer box a couple of times playing with permissions. Not wanting to compromise the Informer application, I tried a different tack.
Microsoft Outlook has an outstanding search and indexing capability built-in. So I grabbed all of the html reports under the results folder on the Informer box and dropped them into a local folder in my Outlook client.
Presto! I now had a searchable threat database built from a year's-worth of Informer reports.
Now that I have a searchable archive, I have made sure to subscribe by email to all of the new Informer Report results. A rule in Outlook will make sure that each new report from the Informer will find its way into my indexed Outlook folder for easy searching.