Does the LDAP protocol specify a maximum length that a DN can take?
I've looked through https://www.rfc-editor.org/rfc/rfc4514 but I can't find any restrictions that it imposes.
Does the LDAP protocol limit the length of a DN
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Most implementations of LDAP DN's usually hit 256 characters, which I think comes from X.500 still. After all X.500 defines the DAP, and LDAP is the Lightweight DAP protocol.
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According to that reply to a similar question, ActiveDirectory limits the DN length to 255 characters.
No, it doesn't seem to be specified explicitly anywhere - and the Active Directory implementation also doesn't impose a max length on the DN syntax (2.5.5.1).
Marc