After extensive testing of such products I was most impressed by IPSentry. It is fully configurable and allows you to monitor services as well.
www.ipsentry.com Dave Stout #********************************************************************** This message is intended solely for the use of the individual or organisation to whom it is addressed. It may contain privileged or confidential information. If you have received this message in error, please notify the originator immediately. If you are not the intended recipient, you should not use, copy, alter, or disclose the contents of this message. All information or opinions expressed in this message and/or any attachments are those of the author and are not necessarily those of Hughes Network Systems Limited, including its European subsidiaries and affiliates. Hughes Network Systems Limited, including its European subsidiaries and affiliates accepts no responsibility for loss or damage arising from its use, including damage from virus. #**********************************************************************