Problem insert url with sub-domain with underscore

[Gideon So]

Hi,

I found that it is not possible to insert a link with underscore in the sub-domain part of a url, for example, my_sundomain.mydomain.com.

Once save the page the link becomes "/".

Is it intentional or a bug??

Gideon

[BitPoet]

Underscores in host names are invalid according to RFC1132, which allows only letters, digits and hyphens. They are only allowed in DNS names for resource records. So PW is operating in undefined territory.

[Gideon So]

I see. Thanks.

Gideon