@John, did you use a / at the end of the begin/end block to execute the PL/SQL? Either way, use the DBMS_NETWORK_ACL_ADMIN.CHECK_PRIVILEGE procedure to verify:

http://download.oracle.com/docs/cd/B28359_01/appdev.111/b28419/d_networkacl_adm.htm#CHDFJHHJ

I’ve been wondering for a while to resolve the PDF printing issue in Apex. After executing your script it worked fine.

I just want to add a note that it is better to add commit statement at the end.

— Create the new ACL, naming it “netacl.xml”, with a description.
— Also, provide one starter privilege, granting user ACLTEST
— the privilege to connect.
DBMS_NETWORK_ACL_ADMIN.CREATE_ACL(‘netacl.xml’,
‘Allow usage to the UTL network packages’, ‘ACLTEST’, TRUE, ‘connect’);

— Now grant privilege to resolve DNS names for ACLTEST,
DBMS_NETWORK_ACL_ADMIN.ADD_PRIVILEGE(‘netacl.xml’ ,’ACLTEST’, TRUE, ‘resolve’);

— Specify which hosts this ACL applies to,
— for simplicity, we’re saying all (*)
DBMS_NETWORK_ACL_ADMIN.ASSIGN_ACL(‘netacl.xml’,'*’);
commit;

end;

Excecution code (as acltest):
declare
l_conn UTL_TCP.connection;
v_file http://ftp.TStringTable;
l_list http://ftp.t_string_table;

begin
l_conn := http://ftp.Logind(‘DOMAIN’, 21, ‘USERNAME’, ‘PASSWORD’);
http://FTP.LIST(l_conn,’\',l_list);
http://ftp.logout(l_conn);
end;

Error stack
ORA-24247: network access denied by access control list (ACL)
ORA-06512: at “SYS.UTL_TCP”, line 17
ORA-06512: at “SYS.UTL_TCP”, line 246
ORA-06512: at “COMMON.FTP”, line 784
ORA-06512: at line 7