My SBS server is mail, DNS, Firewall, proxy, DC, ETC. A have some zones and my server is master server. When I try to transfer all zones to slave servers, I can do that enabling ALLOW FULL packet filter (meaning I have no firewall). I have published DNS server in order to allow queries and zone transfer. I also created a DNS Query ALLOW packet filter. Nothing. It is working only when I enable ALLOW FULL packet filter. Any sugestions? Thanks in advance.