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Redirect DNS traffic from the inside to the outside

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pbxnkey

Programmer
Aug 15, 2006
191
US
Currently the PC's are statically assigned IP and DNS. I want to test a feature but when PC's use DNS I need to redirect DNS requests so that they forward to another DNS server.
If an inside PC had 8.8.8.8 statically assigned for DNS, I want that PC's DNS queries to be redirected to use a different DNS IP.

There are MANY PC's so I really do not want to go around and restatic every PC.
Is this possible on an ASA?

Thanks
 
You could either,

1/ Get your internal DNS server the PC's are configured to use to refer requests to this new DNS server

2/ Reconfigure your PCs to send DNS requests to the new server.

You've discovered why people use DHCP: when things change, you change the settings in one central place.
 
I work for an ISP and the network is the customer's. The customer setup the PC's statically and from what I understand there are quite a few.

What I wound up doing on the ASA was static a NAT:

static (outside,inside) udp 1.1.1.1 53 8.8.8.8 53 netmask 255.255.255.255

1.1.1.1= would be the dns server currently assigned to a PC.

I tested this with a url redirect and it worked like a charm.

Thanks.
 
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