![]() If DNS resolution works from the Firebox, but does not work from clients on the internal network, it is likely that there is no policy on the Firebox to allow outbound DNS requests. To further troubleshoot, you can test DNS resolution from the Firebox as previously described to discover if DNS resolution works from the Firebox. If you can successfully ping the DNS server from a client computer on your network, DNS resolution fails if the Firebox configuration does not have a policy that allows outgoing DNS requests. ![]() To verify whether traffic can be routed to a DNS server, and whether a DNS server is responding you can try to ping the DNS server IP address from the client computer, and from the Firebox. To view the DNS servers in Firebox System Manager, expand the Interfaces status for the Firebox in the Front Panel tab.
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