Thanks Josiah Bryan, I do not have any dns server running on my asterisk server, we do have an external DNS server working in the data center; the IP of this dns server is 10.4.1.5... Following you will see my main configuration: /etc/resolv.conf: domain localdomain search localdomain nameserver 10.4.1.5 nameserver 10.4.1.2 /etc/hosts: # Do not remove the following line, or various programs # that require network functionality will fail. 127.0.0.1 localhost.localdomain localhost Thanks in advance... -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20100208/e4d78d99/attachment.htm