Re: [fw-wiz] DNS records for a firewall NAT pool

From: Frank Knobbe (fknobbe_at_knobbeits.com)
Date: 07/29/03

  • Next message: Joseph Steinberg: "Re: [fw-wiz] A little paranoia for the weekend..." 
    To: Barney Wolff <barney@databus.com>
Date: 29 Jul 2003 16:55:14 -0500

    On Tue, 2003-07-29 at 12:17, Barney Wolff wrote:
    > There are no security risks. The name the PTR points to merely has to
    > map back to the IP. It does not have to match what the host thinks
    > of as its own name. It does not have to have an MX record, just an A.
    > It does not have to add any information not already in the IP address.
    > For example, 66.114.72.185 -> p72-185.acedsl.com -> 66.114.72.185 , done
    > by my ISP.

    Adding to that, in most cases you get can get away by entering the IP
    address as the host name in your in-addr.arpa zone. That way the IP
    address 1.2.3.4 can be mapped to the _hostname_ (as _string_) 1.2.3.4,
    which of course is typically resolved back to the IP address.

    So above example would read:

    66.114.72.185 -> "66.114.72.185" -> 66.1114.72.185 :)

    Regards,
    Frank

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  • Next message: Joseph Steinberg: "Re: [fw-wiz] A little paranoia for the weekend..."

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