Hi John,
The sysopt nodnsalias inbound disables inbound embedded DNS A record fixups according to aliases that apply to the A record address. sysopt nodnsalias outbound affects outbound replies.
This command remedies the case when a DNS server is on the outside and users on the inside need to access a server on a perimeter interface. In the past, you would use the alias command to permit DNS responses to resolve correctly through the PIX Firewall, but formerly you had to reverse the parameters for the local IP address and foreign IP address.
