1*bc4097aaSchristosfilter-rule = [ insert ] action in-out [ options ] [ tos ] [ ttl ] 2*bc4097aaSchristos [ proto ] [ ip ] [ group ] [ tag ] [ pps ] . 3*bc4097aaSchristos 4*bc4097aaSchristosinsert = "@" decnumber . 5*bc4097aaSchristosaction = block | "pass" | log | "count" | auth | call . 6*bc4097aaSchristosin-out = "in" | "out" . 7*bc4097aaSchristosoptions = [ log ] [ "quick" ] [ onif [ dup ] [ froute ] ] . 8*bc4097aaSchristostos = "tos" decnumber | "tos" hexnumber . 9*bc4097aaSchristosttl = "ttl" decnumber . 10*bc4097aaSchristosproto = "proto" protocol . 11*bc4097aaSchristosip = srcdst [ flags ] [ with withopt ] [ icmp ] [ keep ] . 12*bc4097aaSchristosgroup = [ "head" decnumber ] [ "group" decnumber ] . 13*bc4097aaSchristospps = "pps" decnumber . 14*bc4097aaSchristos 15*bc4097aaSchristosonif = "on" interface-name [ "out-via" interface-name ] . 16*bc4097aaSchristosblock = "block" [ return-icmp[return-code] | "return-rst" ] . 17*bc4097aaSchristosauth = "auth" | "preauth" . 18*bc4097aaSchristoslog = "log" [ "body" ] [ "first" ] [ "or-block" ] [ "level" loglevel ] . 19*bc4097aaSchristostag = "tag" tagid . 20*bc4097aaSchristoscall = "call" [ "now" ] function-name "/" decnumber. 21*bc4097aaSchristosdup = "dup-to" interface-name[":"ipaddr] . 22*bc4097aaSchristosfroute = "fastroute" | "to" interface-name . 23*bc4097aaSchristosreplyto = "reply-to" interface-name [ ":" ipaddr ] . 24*bc4097aaSchristosprotocol = "tcp/udp" | "udp" | "tcp" | "icmp" | decnumber . 25*bc4097aaSchristossrcdst = "all" | fromto . 26*bc4097aaSchristosfromto = "from" object "to" object . 27*bc4097aaSchristos 28*bc4097aaSchristosreturn-icmp = "return-icmp" | "return-icmp-as-dest" . 29*bc4097aaSchristosloglevel = facility"."priority | priority . 30*bc4097aaSchristosobject = addr [ port-comp | port-range ] . 31*bc4097aaSchristosaddr = "any" | nummask | host-name [ "mask" ipaddr | "mask" hexnumber ] . 32*bc4097aaSchristosport-comp = "port" compare port-num . 33*bc4097aaSchristosport-range = "port" port-num range port-num . 34*bc4097aaSchristosflags = "flags" flag { flag } [ "/" flag { flag } ] . 35*bc4097aaSchristoswith = "with" | "and" . 36*bc4097aaSchristosicmp = "icmp-type" icmp-type [ "code" decnumber ] . 37*bc4097aaSchristosreturn-code = "("icmp-code")" . 38*bc4097aaSchristoskeep = "keep" "state" [ "limit" number ] | "keep" "frags" . 39*bc4097aaSchristos 40*bc4097aaSchristosnummask = host-name [ "/" decnumber ] . 41*bc4097aaSchristoshost-name = ipaddr | hostname | "any" . 42*bc4097aaSchristosipaddr = host-num "." host-num "." host-num "." host-num . 43*bc4097aaSchristoshost-num = digit [ digit [ digit ] ] . 44*bc4097aaSchristosport-num = service-name | decnumber . 45*bc4097aaSchristos 46*bc4097aaSchristoswithopt = [ "not" | "no" ] opttype [ [ "," ] withopt ] . 47*bc4097aaSchristosopttype = "ipopts" | "short" | "nat" | "bad-src" | "lowttl" | "frag" | 48*bc4097aaSchristos "mbcast" | "opt" ipopts . 49*bc4097aaSchristosoptname = ipopts [ "," optname ] . 50*bc4097aaSchristosipopts = optlist | "sec-class" [ secname ] . 51*bc4097aaSchristossecname = seclvl [ "," secname ] . 52*bc4097aaSchristosseclvl = "unclass" | "confid" | "reserv-1" | "reserv-2" | "reserv-3" | 53*bc4097aaSchristos "reserv-4" | "secret" | "topsecret" . 54*bc4097aaSchristosicmp-type = "unreach" | "echo" | "echorep" | "squench" | "redir" | 55*bc4097aaSchristos "timex" | "paramprob" | "timest" | "timestrep" | "inforeq" | 56*bc4097aaSchristos "inforep" | "maskreq" | "maskrep" | "routerad" | 57*bc4097aaSchristos "routersol" | decnumber . 58*bc4097aaSchristosicmp-code = decumber | "net-unr" | "host-unr" | "proto-unr" | "port-unr" | 59*bc4097aaSchristos "needfrag" | "srcfail" | "net-unk" | "host-unk" | "isolate" | 60*bc4097aaSchristos "net-prohib" | "host-prohib" | "net-tos" | "host-tos" | 61*bc4097aaSchristos "filter-prohib" | "host-preced" | "cutoff-preced" . 62*bc4097aaSchristosoptlist = "nop" | "rr" | "zsu" | "mtup" | "mtur" | "encode" | "ts" | "tr" | 63*bc4097aaSchristos "sec" | "lsrr" | "e-sec" | "cipso" | "satid" | "ssrr" | "addext" | 64*bc4097aaSchristos "visa" | "imitd" | "eip" | "finn" . 65*bc4097aaSchristosfacility = "kern" | "user" | "mail" | "daemon" | "auth" | "syslog" | 66*bc4097aaSchristos "lpr" | "news" | "uucp" | "cron" | "ftp" | "authpriv" | 67*bc4097aaSchristos "audit" | "logalert" | "local0" | "local1" | "local2" | 68*bc4097aaSchristos "local3" | "local4" | "local5" | "local6" | "local7" . 69*bc4097aaSchristospriority = "emerg" | "alert" | "crit" | "err" | "warn" | "notice" | 70*bc4097aaSchristos "info" | "debug" . 71*bc4097aaSchristos 72*bc4097aaSchristoshexnumber = "0" "x" hexstring . 73*bc4097aaSchristoshexstring = hexdigit [ hexstring ] . 74*bc4097aaSchristosdecnumber = digit [ decnumber ] . 75*bc4097aaSchristos 76*bc4097aaSchristoscompare = "=" | "!=" | "<" | ">" | "<=" | ">=" | "eq" | "ne" | "lt" | "gt" | 77*bc4097aaSchristos "le" | "ge" . 78*bc4097aaSchristosrange = "<>" | "><" . 79*bc4097aaSchristoshexdigit = digit | "a" | "b" | "c" | "d" | "e" | "f" . 80*bc4097aaSchristosdigit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" . 81*bc4097aaSchristosflag = "F" | "S" | "R" | "P" | "A" | "U" | "C" | "W" . 82