#if no dest port is given in nat area, take target host port
if($fwdfwsettings{'nat'} eq 'dnat' && $fwdfwsettings{'grp3'} eq 'TGT_PORT' && $fwdfwsettings{'dnatport'} eq ''){$fwdfwsettings{'dnatport'}=$fwdfwsettings{'TGT_PORT'};}
if($fwdfwsettings{'TGT_PORT'} eq '' && $fwdfwsettings{'dnatport'} ne '' && ($fwdfwsettings{'PROT'} eq 'TCP' || $fwdfwsettings{'PROT'} eq 'UDP')){
#if no dest port is given in nat area, take target host port
if($fwdfwsettings{'nat'} eq 'dnat' && $fwdfwsettings{'grp3'} eq 'TGT_PORT' && $fwdfwsettings{'dnatport'} eq ''){$fwdfwsettings{'dnatport'}=$fwdfwsettings{'TGT_PORT'};}
if($fwdfwsettings{'TGT_PORT'} eq '' && $fwdfwsettings{'dnatport'} ne '' && ($fwdfwsettings{'PROT'} eq 'TCP' || $fwdfwsettings{'PROT'} eq 'UDP')){