Question : Exclude multiple IP addresses from Google Analytics

I've set up a filter in Google Analytics to exclude multiple IP addresses, but I'm not sure if it's working. My first question is:  once I set up the filter, should it filter out past traffic?

Secondly, there are multiple people I want to exclude, and I have a record of the IP addresses they've used while on the site. Do I have my expression correct?

^26\.193\.79\.211$|^67\.65\.112\.117$|^215\.138\.67\.80$|^75\.218\.103\.251$|^73\.27\.225\.209$|^78\.66\.244\.189$

This traffic is still showing up in my reports. I set up the filter yesterday.

Answer : Exclude multiple IP addresses from Google Analytics

Google cannot apply a filter to historical data, but you can create a duplicate profile without the filter and see if the filter is working.

Source: http://www.google.com/support/analytics/bin/answer.py?answer=55494&ctx=sibling

When a filter is created in your profile, it's immediately applied to new data coming into your account. A profile's filters are applied to raw visitor data as the data is processed into the database. New filters will not affect historical data, and google is not able to reprocess your old data through the new filter.

If you'd like to apply filters to your data while keeping your "raw" data intact, you can create a duplicate profile in your account. To do so, add a new profile using the Add profile for an existing domain option. When this option is selected, the tracking code generated for the new profile will be identical to the tracking code for the original profile, and data will be imported simultaneously into both. You won't need to change the tracking code on your site, and any filters applied to the first profile will not affect data in the second.