Dns

[zekenshin]

Hello,

I had try to use the static command with my pix and with the help i see the keyword "dns". I had looking for documentation and exemple for this function but i haven't find documentation.

If someone know this function i'll by happy to read this :)

Thank you in advance

Kenshin

[gfullage]

The DNS option on a static basically replaces the "alias" command, in that the PIX will check DNS replies that come through it and change the DNS A record value if it matches the static values.

Documentation for the static command and all its options is here:

http://www.cisco.com/univercd/cc/td/doc/product/iaabu/pix/pix_62/cmdref/s.htm#1026694

[zekenshin]

Thanx you for your answer

Regards

Kenshin

[chariley]

Can you clarify and explain more about this option?

[mostiguy]

Its really for situations where you are using IP addresses you shouldn't, and thus need to double nat (meaning, you aren't using rfc1918 ip addresses, and instead are using legit ips that someone else uses), or when you aren't running an internal dns server, and thus your client machines query an external dns server that has records for global ip addresses, and not the internal ip addressing scheme that you use. dns/alias can doctor these to give internal clients an ip address that works internally