INT_DEV         = 'pppoe|ppp[0-9]+|ippp[0-9]+|eth[0-9]+'
                : 'wrong device specification, use ppp<index>, ippp<index> or eth<index>'

ACCINT          = '(RE:FW_IF)([[:space:]]+(RE:FW_IF))*|(RE:INT_DEV)([[:space:]]+(RE:INT_DEV))*'
                : 'wrong device specification, use any form available for a packet filter expression'

LOKAL_DEV       = 'eth[0-9]+|br[0-9]+'
                : 'wrong device specification, use eth<index> or br<index>'

LEARNFROMINT    = '(RE:LOKAL_DEV)([[:space:]]+(RE:LOKAL_DEV))*'
                : 'wrong device specification, use eth<index> or br<index>'

METHOD          = 'new|old'
                : 'wrong specification, use new or old'