If your logs show 'Invalid UTF8 Encoding' events for what appear to be legitimate traffic, you may need to change your encoding type in Deep Security:

1. Open the properties of the Security Profile used by the host triggering the events (or Host properties, if your filters are assigned directly to the host).
2. Open the DPI Rules section of the profile.
3. Open the properties of the HTTP Protocol Decoder filter.
4. Go to the Configuration tab and then select the Latin-1 encoding option.
5. Click OK.

Once the agent receives the update, Deep Security will allow encoding of this type to pass through the application.