https://bz.apache.org/bugzilla/show_bug.cgi?id=62371
--- Comment #15 from Mark Thomas <ma...@apache.org> --- Ah. Found the reference for the final segment being alphabetic: >From RFC 1123 <quote> However, a valid host name can never have the dotted-decimal form #.#.#.#, since at least the highest-level component label will be alphabetic. </quote> There is some interesting discussion of this in the errata. Where things get 'interesting' is whether the final segment can be purely numeric or not. Per RFC 952 and RFC 1123 they can. There are currently no such gTLDs registered with ICANN. However, they could still be present on an intranet. Therefore, I am leaning towards accepting them. That means 0.0.0.256 would be treated as a valid FQDN rather than as an invalid IPv4 address. Whether any client would let a user specify such a string is a different question. -- You are receiving this mail because: You are the assignee for the bug. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@tomcat.apache.org For additional commands, e-mail: dev-h...@tomcat.apache.org