topic dns doctoring in Network Security https://community.cisco.com/t5/network-security/dns-doctoring/m-p/1833297#M489593 <P>is it possible to intercept a dns lookup on a dmz and direct it to an internal server.</P><P>I have a wireless controller for guest access on a dmz. to authenticate, the wireless controller intercepts the first get syn and redirects it to a guest manager on the inside. I dont have a dns server on the dmz and dont want to use the inside dns server. the ISP will not allow a private address on their dns server so I need a way of redirecting the first get syn to the guest manager for authentication. once authenticated the traffic will use the ISP dns for web traffic.</P><P></P><P>I'd appreciate any help</P> Mon, 11 Mar 2019 22:09:16 GMT michael18 2019-03-11T22:09:16Z dns doctoring https://community.cisco.com/t5/network-security/dns-doctoring/m-p/1833297#M489593 <P>is it possible to intercept a dns lookup on a dmz and direct it to an internal server.</P><P>I have a wireless controller for guest access on a dmz. to authenticate, the wireless controller intercepts the first get syn and redirects it to a guest manager on the inside. I dont have a dns server on the dmz and dont want to use the inside dns server. the ISP will not allow a private address on their dns server so I need a way of redirecting the first get syn to the guest manager for authentication. once authenticated the traffic will use the ISP dns for web traffic.</P><P></P><P>I'd appreciate any help</P> Mon, 11 Mar 2019 22:09:16 GMT https://community.cisco.com/t5/network-security/dns-doctoring/m-p/1833297#M489593 michael18 2019-03-11T22:09:16Z Re: dns doctoring https://community.cisco.com/t5/network-security/dns-doctoring/m-p/1833298#M489597 <HTML><HEAD></HEAD><BODY><P>If you're providing guest access can't you just give them a publicly available dns server? Try 8.8.8.8</P><P></P><P>Sent from Cisco Technical Support iPad App</P></BODY></HTML> Mon, 02 Jan 2012 22:50:37 GMT https://community.cisco.com/t5/network-security/dns-doctoring/m-p/1833298#M489597 Jeff Van Houten 2012-01-02T22:50:37Z