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DNS problems

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I have 3 intel nics in my firewall running the 9.002-12 code on my own box. I appear to have everything working except for DNS. My setup is as follows, internal, external and dmz for my wireless. all my internal devices are working but i'm suspecting because i hardcoded the DNS on all the internal devices. Anything connected to my wireless isn't working as the wireless is connected to the dmz interface.

Under DNS options on the allowed networks, I have the internal network and the dmz network. under forwarders i'm using google dns which works all the time.

my network is setup as follows: internal net is 10.1.1.1 & dmz is 172.22.49.1

and to confirm, if I remove the dns from the internal puters and try to use the dns on the firewall it doesnt work. so my DNS isn't working at all.

Any help would be greatly appreciated it.

I had a similar setup with my netscreen firewall and had no problems so maybe im configuring it based on the rules of netscreen and JUNOS.

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