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They always could have underscore. But beware of browser issues (cookies will fail in IE - at least pre 9 versions, for example).
by nolok 14y ago
They always could have underscore. But beware of browser issues (cookies will fail in IE - at least pre 9 versions, for example).
- TazeTSchnitzel 14y agoWell, thing is hostnames are supposed to only contain letters, digits and hyphens, although other DNS names can contain underscores. So it shouldn't work. You should be able to have a TEXT record with an underscore, but really shouldn't be able to have an A or AAAA record.
- imechura 14y agoIn this case optimus_prime is a sub domain. The actual DNS entry is likely *.jpg.to so DNS does not have to know how to resolve the URI section with underscore.
- TazeTSchnitzel 14y agoI'm not sure wildcard entries are actually a feature of DNS, I thought they were something done server-side by the DNS server.