Hi! I don't quite understand the semantics of !~. So far I though it would be the negated result of =~, i.e. if (a =~ b) is true (a !~ b) is false and v.v. But that doesn't seem to be the case. If I add this in the beginning of the users file (extract starting at line no. 6) DEFAULT Reply-Message += "Realm is %{Realm}", Fall-Through = Yes DEFAULT Realm =~ example.com|NULL Reply-Message += "Internal User", Fall-Through = Yes DEFAULT Realm !~ example.com|NULL Reply-Message += "External User", Fall-Through = Yes it works correctly for a user name test or test@example.com: (106) files : users: Matched entry DEFAULT at line 6 (106) files : EXPAND Realm is %{Realm} (106) files : --> Realm is example.com (106) files : users: Matched entry DEFAULT at line 10 ... (106) Reply: Reply-Message = 'Realm is example.com' Reply-Message = 'Internal User' (140) files : users: Matched entry DEFAULT at line 6 (140) files : EXPAND Realm is %{Realm} (140) files : --> Realm is NULL (140) files : users: Matched entry DEFAULT at line 10 ... Reply-Message = 'Realm is NULL' Reply-Message = 'Internal User' But it never gets the !~ (line 47 is a later rule in the users file): (191) files : users: Matched entry DEFAULT at line 6 (191) files : EXPAND Realm is %{Realm} (191) files : --> Realm is DEFAULT (191) files : users: Matched entry DEFAULT at line 47 ... So it seems the !~ never matches. That is kind of unexpected and doesn't make sense to me. Is that a bug or am I missing something? Thanks, Gerald