Matus, What do you mean with " absolutely no, but since underscore is not valid in hostname as per rfc1123, I don't recomment you to use it in hostnamed" ?
I tried with the following configuration in zone " dekil.nl " and bind do not accept it: hello_mail2.dekil.nl. 3600 IN A 81.246.48.28 I have the following message error: Feb 17 10:40:41 dnszone904 named[1633]: /etc/bind/zones/master/dekil.nl:19: hello_mail2.dekil.nl: bad owner name (check-names) Feb 17 10:40:41 dnszone904 named[1633]: zone dekil.nl/IN: loading from master file /etc/bind/zones/master/dekil.nl failed: bad owner name (check-names) Feb 17 10:40:41 dnszone904 named[1633]: zone dekil.nl/IN: not loaded due to errors. Sensitivity: Internal Use Only -----Original Message----- From: bind-users <bind-users-boun...@lists.isc.org> On Behalf Of Matus UHLAR - fantomas Sent: 17 February 2021 09:53 To: bind-users@lists.isc.org Subject: Re: underscore in A or PTR records On 17.02.21 08:13, ONRUBIA AVILES Carlos (CCS/MST) wrote: >I face the following problem ==> bind do not accept an A record with >underscore: > >Example: example_try A 1.2.3.4 > > >Same for a PTR: > >Example: 1.2.3.4 PTR example_try > > >Is it absolutely forbidden to have in such cases an '_'? absolutely no, but since underscore is not valid in hostname as per rfc1123, I don't recomment you to use it in hostnamed. >I know that it is possible for SRV or TXT records. it's valid in DNS, but not in hostnames. You can in fact disable checking but you may encounter problems with remote sites. -- Matus UHLAR - fantomas, uh...@fantomas.sk ; https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.fantomas.sk%2F&data=04%7C01%7Ccarlos.onrubia.aviles%40proximus.com%7Ce40888443de343c66a9408d8d3218eb1%7Ce7ab81b21e844bf79dcbb6fec01ed138%7C0%7C0%7C637491488366965000%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=KzvQWs%2BuNEwQvNH2rKKOreQlm2YhJfYYPrssbqswhV4%3D&reserved=0 Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. Linux IS user friendly, it's just selective who its friends are... _______________________________________________ Please visit https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.isc.org%2Fmailman%2Flistinfo%2Fbind-users&data=04%7C01%7Ccarlos.onrubia.aviles%40proximus.com%7Ce40888443de343c66a9408d8d3218eb1%7Ce7ab81b21e844bf79dcbb6fec01ed138%7C0%7C0%7C637491488366965000%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=glCh5z35uLUmPPW86kRaScRn4ZhytXWLO4BewiR3H7Q%3D&reserved=0 to unsubscribe from this list ISC funds the development of this software with paid support subscriptions. Contact us at https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.isc.org%2Fcontact%2F&data=04%7C01%7Ccarlos.onrubia.aviles%40proximus.com%7Ce40888443de343c66a9408d8d3218eb1%7Ce7ab81b21e844bf79dcbb6fec01ed138%7C0%7C0%7C637491488366969979%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=qQ7VCy6Gav8js8yeMQVEL1XgzW4hAscFrulvYjfK8Gc%3D&reserved=0 for more information. bind-users mailing list bind-users@lists.isc.org https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.isc.org%2Fmailman%2Flistinfo%2Fbind-users&data=04%7C01%7Ccarlos.onrubia.aviles%40proximus.com%7Ce40888443de343c66a9408d8d3218eb1%7Ce7ab81b21e844bf79dcbb6fec01ed138%7C0%7C0%7C637491488366969979%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=cV83jmF%2BfQ2vNyNhHvV9%2F%2Ff8GX6FS63712vB7M3X2bA%3D&reserved=0 This e-mail cannot be used for other purposes than Proximus business use. See more on https://www.proximus.be/maildisclaimer _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
