When I connect a mobile phone or a tablet to my wireless network it works fine even though they don't have a certificate installed. I am checking the MAC address and putting them into a public vlan if it is not found. However when I connect a windows laptop that does not have a certificate installed it doesn't allow it. It won't connect and radius says it has an unknown CA I am using PEAP which it is my understanding would allow you to connect with a user name and password and no certificate if you told it not to validate the certificate. It is important that people be able to connect even if they don't have a certificate and I just control it based on the mac address. Thanks, Joe -- This email message and any attachments are for the sole use of the intended recipient(s) and contain confidential and/or privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message and any attachments.