recreate table att_log (att_id int, att_name varchar(50), att_user varchar(31), att_addr varchar(25), att_prot varchar(15), att_auth varchar(15), att_dts timestamp default 'now');
commit;
set term ^;
create or alter trigger trg_connect active on connect as
begin
  in autonomous transaction do
  insert into att_log(att_id, att_name, att_user, att_addr, att_prot, att_auth)
  select
       mon$attachment_id
      ,mon$attachment_name
      ,mon$user
      ,mon$remote_address
      ,mon$remote_protocol
      ,mon$auth_method
  from mon$attachments
  --where mon$attachment_id = current_connection
  ;
end
^
set term ;^
commit;

quit;

gbak -b localhost/3333:C:\FBTESTING\qa\fbt-repo\tmp\E30.fdb C:\FBTESTING\qa\fbt-repo\tmp\E30.fbk

gbak: ERROR:INSERT operation is not allowed for system table ATT_LOG
gbak: ERROR:    At trigger 'TRG_CONNECT' line: 4, col: 3
gbak:Exiting before completion due to errors


fbsvcmgr localhost:service_mgr action_backup dbname C:\FBTESTING\qa\fbt-repo\tmp\E30.fdb bkp_file C:\FBTESTING\qa\fbt-repo\tmp\E30.fbk

INSERT operation is not allowed for system table ATT_LOG
-At trigger 'TRG_CONNECT' line: 4, col: 3
-Exiting before completion due to errors

ATT_ID                          3
ATT_NAME                        C:\MIX\FIREBIRD\QA\FBT-REPO\TMP\E25.FDB
ATT_USER                        SYSDBA
ATT_ADDR                        127.0.0.1
ATT_PROT                        TCPv4
ATT_PROC                         <null> 
ATT_DTS                         2015-09-08 14:03:38.2030

ATT_ID                          3
ATT_NAME                        e25
ATT_USER                        SYSDBA
ATT_ADDR                        192.168.43.154
ATT_PROT                        TCPv4
ATT_PROC                        C:\MIX\firebird\fb25\bin\gbak.exe
ATT_DTS                         2015-09-08 14:00:30.4840