Hi Sorry to be bothering you about the topic once again. I have read the book and read the article Basic Netmeeting ....etc on the site. My internal clients have the firewall client installed, but can only make outbound calls to machines on the net if they unregister from the gatekeeper. When registered they are immediately given the message that the 'person you are calling is not registered with the gatekeeper' As regards inbound calls from machines on the net, the external client is registered with the gateway, the 'Accept call and cancel call ' appear. When I accept the call the is a delay, and the external client gets a message saying ' the person you called cannot accept netmeeting calls' I have a protocol rule created as per instruction on your site (H323 outbound . any , always, any request) Site and content rule allows , any request , always, all destination. Application filter set Gatekeeper created and only internal NIC checked. Your help would be greatly appreciated as I then need to connect 2 H323 sites together. The other site works fine, but this one has SBS2000. Awaiting your reply William England