1*41edb306SCy Schubertfilter-rule = [ insert ] action in-out [ options ] [ tos ] [ ttl ] 2*41edb306SCy Schubert [ proto ] [ ip ] [ group ] [ tag ] [ pps ] . 3*41edb306SCy Schubert 4*41edb306SCy Schubertinsert = "@" decnumber . 5*41edb306SCy Schubertaction = block | "pass" | log | "count" | auth | call . 6*41edb306SCy Schubertin-out = "in" | "out" . 7*41edb306SCy Schubertoptions = [ log ] [ "quick" ] [ onif [ dup ] [ froute ] ] . 8*41edb306SCy Schuberttos = "tos" decnumber | "tos" hexnumber . 9*41edb306SCy Schubertttl = "ttl" decnumber . 10*41edb306SCy Schubertproto = "proto" protocol . 11*41edb306SCy Schubertip = srcdst [ flags ] [ with withopt ] [ icmp ] [ keep ] . 12*41edb306SCy Schubertgroup = [ "head" decnumber ] [ "group" decnumber ] . 13*41edb306SCy Schubertpps = "pps" decnumber . 14*41edb306SCy Schubert 15*41edb306SCy Schubertonif = "on" interface-name [ "out-via" interface-name ] . 16*41edb306SCy Schubertblock = "block" [ return-icmp[return-code] | "return-rst" ] . 17*41edb306SCy Schubertauth = "auth" | "preauth" . 18*41edb306SCy Schubertlog = "log" [ "body" ] [ "first" ] [ "or-block" ] [ "level" loglevel ] . 19*41edb306SCy Schuberttag = "tag" tagid . 20*41edb306SCy Schubertcall = "call" [ "now" ] function-name "/" decnumber. 21*41edb306SCy Schubertdup = "dup-to" interface-name[":"ipaddr] . 22*41edb306SCy Schubertfroute = "fastroute" | "to" interface-name . 23*41edb306SCy Schubertreplyto = "reply-to" interface-name [ ":" ipaddr ] . 24*41edb306SCy Schubertprotocol = "tcp/udp" | "udp" | "tcp" | "icmp" | decnumber . 25*41edb306SCy Schubertsrcdst = "all" | fromto . 26*41edb306SCy Schubertfromto = "from" object "to" object . 27*41edb306SCy Schubert 28*41edb306SCy Schubertreturn-icmp = "return-icmp" | "return-icmp-as-dest" . 29*41edb306SCy Schubertloglevel = facility"."priority | priority . 30*41edb306SCy Schubertobject = addr [ port-comp | port-range ] . 31*41edb306SCy Schubertaddr = "any" | nummask | host-name [ "mask" ipaddr | "mask" hexnumber ] . 32*41edb306SCy Schubertport-comp = "port" compare port-num . 33*41edb306SCy Schubertport-range = "port" port-num range port-num . 34*41edb306SCy Schubertflags = "flags" flag { flag } [ "/" flag { flag } ] . 35*41edb306SCy Schubertwith = "with" | "and" . 36*41edb306SCy Schuberticmp = "icmp-type" icmp-type [ "code" decnumber ] . 37*41edb306SCy Schubertreturn-code = "("icmp-code")" . 38*41edb306SCy Schubertkeep = "keep" "state" [ "limit" number ] | "keep" "frags" . 39*41edb306SCy Schubert 40*41edb306SCy Schubertnummask = host-name [ "/" decnumber ] . 41*41edb306SCy Schuberthost-name = ipaddr | hostname | "any" . 42*41edb306SCy Schubertipaddr = host-num "." host-num "." host-num "." host-num . 43*41edb306SCy Schuberthost-num = digit [ digit [ digit ] ] . 44*41edb306SCy Schubertport-num = service-name | decnumber . 45*41edb306SCy Schubert 46*41edb306SCy Schubertwithopt = [ "not" | "no" ] opttype [ [ "," ] withopt ] . 47*41edb306SCy Schubertopttype = "ipopts" | "short" | "nat" | "bad-src" | "lowttl" | "frag" | 48*41edb306SCy Schubert "mbcast" | "opt" ipopts . 49*41edb306SCy Schubertoptname = ipopts [ "," optname ] . 50*41edb306SCy Schubertipopts = optlist | "sec-class" [ secname ] . 51*41edb306SCy Schubertsecname = seclvl [ "," secname ] . 52*41edb306SCy Schubertseclvl = "unclass" | "confid" | "reserv-1" | "reserv-2" | "reserv-3" | 53*41edb306SCy Schubert "reserv-4" | "secret" | "topsecret" . 54*41edb306SCy Schuberticmp-type = "unreach" | "echo" | "echorep" | "squench" | "redir" | 55*41edb306SCy Schubert "timex" | "paramprob" | "timest" | "timestrep" | "inforeq" | 56*41edb306SCy Schubert "inforep" | "maskreq" | "maskrep" | "routerad" | 57*41edb306SCy Schubert "routersol" | decnumber . 58*41edb306SCy Schuberticmp-code = decumber | "net-unr" | "host-unr" | "proto-unr" | "port-unr" | 59*41edb306SCy Schubert "needfrag" | "srcfail" | "net-unk" | "host-unk" | "isolate" | 60*41edb306SCy Schubert "net-prohib" | "host-prohib" | "net-tos" | "host-tos" | 61*41edb306SCy Schubert "filter-prohib" | "host-preced" | "cutoff-preced" . 62*41edb306SCy Schubertoptlist = "nop" | "rr" | "zsu" | "mtup" | "mtur" | "encode" | "ts" | "tr" | 63*41edb306SCy Schubert "sec" | "lsrr" | "e-sec" | "cipso" | "satid" | "ssrr" | "addext" | 64*41edb306SCy Schubert "visa" | "imitd" | "eip" | "finn" . 65*41edb306SCy Schubertfacility = "kern" | "user" | "mail" | "daemon" | "auth" | "syslog" | 66*41edb306SCy Schubert "lpr" | "news" | "uucp" | "cron" | "ftp" | "authpriv" | 67*41edb306SCy Schubert "audit" | "logalert" | "local0" | "local1" | "local2" | 68*41edb306SCy Schubert "local3" | "local4" | "local5" | "local6" | "local7" . 69*41edb306SCy Schubertpriority = "emerg" | "alert" | "crit" | "err" | "warn" | "notice" | 70*41edb306SCy Schubert "info" | "debug" . 71*41edb306SCy Schubert 72*41edb306SCy Schuberthexnumber = "0" "x" hexstring . 73*41edb306SCy Schuberthexstring = hexdigit [ hexstring ] . 74*41edb306SCy Schubertdecnumber = digit [ decnumber ] . 75*41edb306SCy Schubert 76*41edb306SCy Schubertcompare = "=" | "!=" | "<" | ">" | "<=" | ">=" | "eq" | "ne" | "lt" | "gt" | 77*41edb306SCy Schubert "le" | "ge" . 78*41edb306SCy Schubertrange = "<>" | "><" . 79*41edb306SCy Schuberthexdigit = digit | "a" | "b" | "c" | "d" | "e" | "f" . 80*41edb306SCy Schubertdigit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" . 81*41edb306SCy Schubertflag = "F" | "S" | "R" | "P" | "A" | "U" | "C" | "W" . 82