On Fri, 14 Dec 2012, Feng He wrote: > does the TXT record allow a underline in its hostname?
There is some conflation there. A "hostname" is a particular kind of label, historically chosen from a limited character set to avoid untoward interactions with runtime environments. For example, what might occur running this under bash?: dig `rm -rf *`.m3047.net Properly escaped you could get away with it: dig '`rm -rf *`.m3047.net' Nonetheless it's considered a bad idea to allow labels which could be used to resolve a host to contain characters which might not be a good idea for a hostname, and therefore delegating zones should not contain non-hostname labels in their FQDNs. However the Domain Name System per se imposes no such restrictions on labels. Khazakhstan issued domain names starting with a dash for a limited period of time... DAMHIK! -- Fred Morris _______________________________________________ dns-operations mailing list dns-operations@lists.dns-oarc.net https://lists.dns-oarc.net/mailman/listinfo/dns-operations dns-jobs mailing list https://lists.dns-oarc.net/mailman/listinfo/dns-jobs
