Re: Questions about NAPTR
In message <1505796688.2518.99.ca...@biplane.com.au>, Karl Auer writes: > On Tue, 2017-09-19 at 13:56 +1000, Mark Andrews wrote: > > In message <1505734269.2518.70.ca...@biplane.com.au>, Karl Auer > > writes: > > > And is it true that "if the Regexp field is not empty, the > > > Replacement field will not be used"? > > With the current flags no but who know what will happen in the > > future. > > Not sure what "no" means. My fault for putting up a statement with two > negatives. > > It seems to me that the output from a NAPTR is EITHER the result of > applying a regexp to the left-hand side domain name, OR the value of > the replacement field. I.e., they are mutually exclusive. So if the > regexp is empty, the replacement is used verbatim. If the regexp is NOT > empty, the replacement is ignored (but still has to conform to domain > name syntax, hence the need for a dot). > > Is that understanding correct? As things currently stand yes. Someone could write a document today that specifies a flag that combines the fields. The future is uncertain. > Thanks, K. > > -- > ~~~ > Karl Auer (ka...@biplane.com.au) > http://www.biplane.com.au/kauer > http://twitter.com/kauer389 > > GPG fingerprint: A52E F6B9 708B 51C4 85E61634 0571 ADF9 3C1C 6A3A > Old fingerprint: E00D 64ED 9C6A 8605 21E0 0ED0 EE64 2BEE CBCB C38B > > > ___ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to > unsubscribe from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: Questions about NAPTR
On Tue, 2017-09-19 at 13:56 +1000, Mark Andrews wrote: > In message <1505734269.2518.70.ca...@biplane.com.au>, Karl Auer > writes: > > And is it true that "if the Regexp field is not empty, the > > Replacement field will not be used"? > With the current flags no but who know what will happen in the > future. Not sure what "no" means. My fault for putting up a statement with two negatives. It seems to me that the output from a NAPTR is EITHER the result of applying a regexp to the left-hand side domain name, OR the value of the replacement field. I.e., they are mutually exclusive. So if the regexp is empty, the replacement is used verbatim. If the regexp is NOT empty, the replacement is ignored (but still has to conform to domain name syntax, hence the need for a dot). Is that understanding correct? Thanks, K. -- ~~~ Karl Auer (ka...@biplane.com.au) http://www.biplane.com.au/kauer http://twitter.com/kauer389 GPG fingerprint: A52E F6B9 708B 51C4 85E6 1634 0571 ADF9 3C1C 6A3A Old fingerprint: E00D 64ED 9C6A 8605 21E0 0ED0 EE64 2BEE CBCB C38B ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: Questions about NAPTR
In message <1505734269.2518.70.ca...@biplane.com.au>, Karl Auer writes: > On Mon, 2017-09-18 at 19:45 +1000, Mark Andrews wrote: > > In message <1505723565.2518.54.ca...@biplane.com.au>, Karl Auer > > writes: > > > 2: Can the Replacement field be empty? It looks from the text and > > > examples as if it should always contain a complete domain name BUT > > > that if the Regexp field is not empty, the Replacement field will > > > not be used. > > No. Use '.' as a place holder. > > Er - isn't "." a complete domain name? Yes. The field must exist. "." is used as place holder. Note "." is used as a place holder in a number of different records. > And is it true that "if the Regexp field is not empty, the Replacement > field will not be used"? With the current flags no but who know what will happen in the future. > Thanks for the info. > > Regards, K. > > -- > ~~~ > Karl Auer (ka...@biplane.com.au) > http://www.biplane.com.au/kauer > http://twitter.com/kauer389 > > GPG fingerprint: A52E F6B9 708B 51C4 85E61634 0571 ADF9 3C1C 6A3A > Old fingerprint: E00D 64ED 9C6A 8605 21E0 0ED0 EE64 2BEE CBCB C38B > > > ___ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to > unsubscribe from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: Questions about NAPTR
On Mon, 2017-09-18 at 19:45 +1000, Mark Andrews wrote: > In message <1505723565.2518.54.ca...@biplane.com.au>, Karl Auer > writes: > > 2: Can the Replacement field be empty? It looks from the text and > > examples as if it should always contain a complete domain name BUT > > that if the Regexp field is not empty, the Replacement field will > > not be used. > No. Use '.' as a place holder. Er - isn't "." a complete domain name? And is it true that "if the Regexp field is not empty, the Replacement field will not be used"? Thanks for the info. Regards, K. -- ~~~ Karl Auer (ka...@biplane.com.au) http://www.biplane.com.au/kauer http://twitter.com/kauer389 GPG fingerprint: A52E F6B9 708B 51C4 85E6 1634 0571 ADF9 3C1C 6A3A Old fingerprint: E00D 64ED 9C6A 8605 21E0 0ED0 EE64 2BEE CBCB C38B ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: Questions about NAPTR
In message <1505723565.2518.54.ca...@biplane.com.au>, Karl Auer writes: > I've been reading RFC2915 and have a couple of questions about NAPTR > records. I'm trying to do *basic* validation of data from a database > being processed into the DNS. > > 1: Can the Flags field be empty? It seems to me that it can be under > some circumstances. Yes, use '""'. > 2: Can the Replacement field be empty? It looks from the text and > examples as if it should always contain a complete domain name BUT that > if the Regexp field is not empty, the Replacement field will not be > used. No. Use '.' as a place holder. > 3: Can the Regexp field be empty? It seems to me that it can be, in > which case the Replacement field will be used without alteration. Yes, use '""'. > Regards, K. > > -- > ~~~ > Karl Auer (ka...@biplane.com.au) > http://www.biplane.com.au/kauer > http://twitter.com/kauer389 > > GPG fingerprint: A52E F6B9 708B 51C4 85E61634 0571 ADF9 3C1C 6A3A > Old fingerprint: E00D 64ED 9C6A 8605 21E0 0ED0 EE64 2BEE CBCB C38B > > > ___ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to > unsubscribe from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
