rc.firewall revision 201930
1#!/bin/sh - 2# Copyright (c) 1996 Poul-Henning Kamp 3# All rights reserved. 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions 7# are met: 8# 1. Redistributions of source code must retain the above copyright 9# notice, this list of conditions and the following disclaimer. 10# 2. Redistributions in binary form must reproduce the above copyright 11# notice, this list of conditions and the following disclaimer in the 12# documentation and/or other materials provided with the distribution. 13# 14# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24# SUCH DAMAGE. 25# 26# $FreeBSD: head/etc/rc.firewall 201930 2010-01-09 19:16:27Z ume $ 27# 28 29# 30# Setup system for ipfw(4) firewall service. 31# 32 33# Suck in the configuration variables. 34if [ -z "${source_rc_confs_defined}" ]; then 35 if [ -r /etc/defaults/rc.conf ]; then 36 . /etc/defaults/rc.conf 37 source_rc_confs 38 elif [ -r /etc/rc.conf ]; then 39 . /etc/rc.conf 40 fi 41fi 42 43############ 44# Define the firewall type in /etc/rc.conf. Valid values are: 45# open - will allow anyone in 46# client - will try to protect just this machine 47# simple - will try to protect a whole network 48# closed - totally disables IP services except via lo0 interface 49# workstation - will try to protect just this machine using statefull 50# firewalling. See below for rc.conf variables used 51# UNKNOWN - disables the loading of firewall rules. 52# filename - will load the rules in the given filename (full path required) 53# 54# For ``client'' and ``simple'' the entries below should be customized 55# appropriately. 56 57############ 58# 59# If you don't know enough about packet filtering, we suggest that you 60# take time to read this book: 61# 62# Building Internet Firewalls, 2nd Edition 63# Brent Chapman and Elizabeth Zwicky 64# 65# O'Reilly & Associates, Inc 66# ISBN 1-56592-871-7 67# http://www.ora.com/ 68# http://www.oreilly.com/catalog/fire2/ 69# 70# For a more advanced treatment of Internet Security read: 71# 72# Firewalls and Internet Security: Repelling the Wily Hacker, 2nd Edition 73# William R. Cheswick, Steven M. Bellowin, Aviel D. Rubin 74# 75# Addison-Wesley / Prentice Hall 76# ISBN 0-201-63466-X 77# http://www.pearsonhighered.com/ 78# http://www.pearsonhighered.com/educator/academic/product/0,3110,020163466X,00.html 79# 80 81setup_loopback () { 82 ############ 83 # Only in rare cases do you want to change these rules 84 # 85 ${fwcmd} add 100 pass all from any to any via lo0 86 ${fwcmd} add 200 deny all from any to 127.0.0.0/8 87 ${fwcmd} add 300 deny ip from 127.0.0.0/8 to any 88 if [ $ipv6_available -eq 0 ]; then 89 ${fwcmd} add 400 deny all from any to ::1 90 ${fwcmd} add 500 deny all from ::1 to any 91 fi 92} 93 94setup_ipv6_mandatory () { 95 [ $ipv6_available -eq 0 ] || return 0 96 97 ############ 98 # Only in rare cases do you want to change these rules 99 # 100 # ND 101 # 102 # DAD 103 ${fwcmd} add pass ipv6-icmp from :: to ff02::/16 104 # RS, RA, NS, NA, redirect... 105 ${fwcmd} add pass ipv6-icmp from fe80::/10 to fe80::/10 106 ${fwcmd} add pass ipv6-icmp from fe80::/10 to ff02::/16 107 108 # Allow ICMPv6 destination unreach 109 ${fwcmd} add pass ipv6-icmp from any to any icmp6types 1 110 111 # Allow NS/NA/toobig (don't filter it out) 112 ${fwcmd} add pass ipv6-icmp from any to any icmp6types 2,135,136 113} 114 115if [ -n "${1}" ]; then 116 firewall_type="${1}" 117fi 118 119. /etc/rc.subr 120. /etc/network.subr 121afexists inet6 122ipv6_available=$? 123 124############ 125# Set quiet mode if requested 126# 127case ${firewall_quiet} in 128[Yy][Ee][Ss]) 129 fwcmd="/sbin/ipfw -q" 130 ;; 131*) 132 fwcmd="/sbin/ipfw" 133 ;; 134esac 135 136############ 137# Flush out the list before we begin. 138# 139${fwcmd} -f flush 140 141setup_loopback 142setup_ipv6_mandatory 143 144############ 145# Network Address Translation. All packets are passed to natd(8) 146# before they encounter your remaining rules. The firewall rules 147# will then be run again on each packet after translation by natd 148# starting at the rule number following the divert rule. 149# 150# For ``simple'' firewall type the divert rule should be put to a 151# different place to not interfere with address-checking rules. 152# 153case ${firewall_type} in 154[Oo][Pp][Ee][Nn]|[Cc][Ll][Ii][Ee][Nn][Tt]) 155 case ${natd_enable} in 156 [Yy][Ee][Ss]) 157 if [ -n "${natd_interface}" ]; then 158 ${fwcmd} add 50 divert natd ip4 from any to any via ${natd_interface} 159 fi 160 ;; 161 esac 162 case ${firewall_nat_enable} in 163 [Yy][Ee][Ss]) 164 if [ -n "${firewall_nat_interface}" ]; then 165 if echo "${firewall_nat_interface}" | \ 166 grep -q -E '^[0-9]+(\.[0-9]+){0,3}$'; then 167 firewall_nat_flags="ip ${firewall_nat_interface} ${firewall_nat_flags}" 168 else 169 firewall_nat_flags="if ${firewall_nat_interface} ${firewall_nat_flags}" 170 fi 171 ${fwcmd} nat 123 config log ${firewall_nat_flags} 172 ${fwcmd} add 50 nat 123 ip4 from any to any via ${firewall_nat_interface} 173 fi 174 ;; 175 esac 176esac 177 178############ 179# If you just configured ipfw in the kernel as a tool to solve network 180# problems or you just want to disallow some particular kinds of traffic 181# then you will want to change the default policy to open. You can also 182# do this as your only action by setting the firewall_type to ``open''. 183# 184# ${fwcmd} add 65000 pass all from any to any 185 186 187# Prototype setups. 188# 189case ${firewall_type} in 190[Oo][Pp][Ee][Nn]) 191 ${fwcmd} add 65000 pass all from any to any 192 ;; 193 194[Cc][Ll][Ii][Ee][Nn][Tt]) 195 ############ 196 # This is a prototype setup that will protect your system somewhat 197 # against people from outside your own network. 198 # 199 # Configuration: 200 # firewall_client_net: Network address of local IPv4 network. 201 # firewall_client_net_ipv6: Network address of local IPv6 network. 202 ############ 203 204 # set this to your local network 205 net="$firewall_client_net" 206 net6="$firewall_client_net_ipv6" 207 208 # Allow limited broadcast traffic from my own net. 209 ${fwcmd} add pass all from ${net} to 255.255.255.255 210 211 # Allow any traffic to or from my own net. 212 ${fwcmd} add pass all from me to ${net} 213 ${fwcmd} add pass all from ${net} to me 214 if [ -n "$net6" ]; then 215 ${fwcmd} add pass all from me6 to ${net6} 216 ${fwcmd} add pass all from ${net6} to me6 217 fi 218 219 if [ -n "$net6" ]; then 220 # Allow any link-local multicast traffic 221 ${fwcmd} add pass all from fe80::/10 to ff02::/16 222 ${fwcmd} add pass all from ${net6} to ff02::/16 223 # Allow DHCPv6 224 ${fwcmd} add pass udp from fe80::/10 to me6 546 225 fi 226 227 # Allow TCP through if setup succeeded 228 ${fwcmd} add pass tcp from any to any established 229 230 # Allow IP fragments to pass through 231 ${fwcmd} add pass all from any to any frag 232 233 # Allow setup of incoming email 234 ${fwcmd} add pass tcp from any to me 25 setup 235 if [ -n "$net6" ]; then 236 ${fwcmd} add pass tcp from any to me6 25 setup 237 fi 238 239 # Allow setup of outgoing TCP connections only 240 ${fwcmd} add pass tcp from me to any setup 241 if [ -n "$net6" ]; then 242 ${fwcmd} add pass tcp from me6 to any setup 243 fi 244 245 # Disallow setup of all other TCP connections 246 ${fwcmd} add deny tcp from any to any setup 247 248 # Allow DNS queries out in the world 249 ${fwcmd} add pass udp from me to any 53 keep-state 250 if [ -n "$net6" ]; then 251 ${fwcmd} add pass udp from me6 to any 53 keep-state 252 fi 253 254 # Allow NTP queries out in the world 255 ${fwcmd} add pass udp from me to any 123 keep-state 256 if [ -n "$net6" ]; then 257 ${fwcmd} add pass udp from me6 to any 123 keep-state 258 fi 259 260 # Everything else is denied by default, unless the 261 # IPFIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel 262 # config file. 263 ;; 264 265[Ss][Ii][Mm][Pp][Ll][Ee]) 266 ############ 267 # This is a prototype setup for a simple firewall. Configure this 268 # machine as a DNS and NTP server, and point all the machines 269 # on the inside at this machine for those services. 270 # 271 # Configuration: 272 # firewall_simple_iif: Inside IPv4 network interface. 273 # firewall_simple_inet: Inside IPv4 network address. 274 # firewall_simple_oif: Outside IPv4 network interface. 275 # firewall_simple_onet: Outside IPv4 network address. 276 # firewall_simple_iif_ipv6: Inside IPv6 network interface. 277 # firewall_simple_inet_ipv6: Inside IPv6 network prefix. 278 # firewall_simple_oif_ipv6: Outside IPv6 network interface. 279 # firewall_simple_onet_ipv6: Outside IPv6 network prefix. 280 ############ 281 282 # set these to your outside interface network 283 oif="$firewall_simple_oif" 284 onet="$firewall_simple_onet" 285 oif6="${firewall_simple_oif_ipv6:-$firewall_simple_oif}" 286 onet6="$firewall_simple_onet_ipv6" 287 288 # set these to your inside interface network 289 iif="$firewall_simple_iif" 290 inet="$firewall_simple_inet" 291 iif6="${firewall_simple_iif_ipv6:-$firewall_simple_iif}" 292 inet6="$firewall_simple_inet_ipv6" 293 294 # Stop spoofing 295 ${fwcmd} add deny all from ${inet} to any in via ${oif} 296 ${fwcmd} add deny all from ${onet} to any in via ${iif} 297 if [ -n "$inet6" ]; then 298 ${fwcmd} add deny all from ${inet6} to any in via ${oif6} 299 if [ -n "$onet6" ]; then 300 ${fwcmd} add deny all from ${onet6} to any in \ 301 via ${iif6} 302 fi 303 fi 304 305 # Stop RFC1918 nets on the outside interface 306 ${fwcmd} add deny all from any to 10.0.0.0/8 via ${oif} 307 ${fwcmd} add deny all from any to 172.16.0.0/12 via ${oif} 308 ${fwcmd} add deny all from any to 192.168.0.0/16 via ${oif} 309 310 # Stop draft-manning-dsua-03.txt (1 May 2000) nets (includes RESERVED-1, 311 # DHCP auto-configuration, NET-TEST, MULTICAST (class D), and class E) 312 # on the outside interface 313 ${fwcmd} add deny all from any to 0.0.0.0/8 via ${oif} 314 ${fwcmd} add deny all from any to 169.254.0.0/16 via ${oif} 315 ${fwcmd} add deny all from any to 192.0.2.0/24 via ${oif} 316 ${fwcmd} add deny all from any to 224.0.0.0/4 via ${oif} 317 ${fwcmd} add deny all from any to 240.0.0.0/4 via ${oif} 318 319 # Network Address Translation. This rule is placed here deliberately 320 # so that it does not interfere with the surrounding address-checking 321 # rules. If for example one of your internal LAN machines had its IP 322 # address set to 192.0.2.1 then an incoming packet for it after being 323 # translated by natd(8) would match the `deny' rule above. Similarly 324 # an outgoing packet originated from it before being translated would 325 # match the `deny' rule below. 326 case ${natd_enable} in 327 [Yy][Ee][Ss]) 328 if [ -n "${natd_interface}" ]; then 329 ${fwcmd} add divert natd ip4 from any to any via ${natd_interface} 330 fi 331 ;; 332 esac 333 334 # Stop RFC1918 nets on the outside interface 335 ${fwcmd} add deny all from 10.0.0.0/8 to any via ${oif} 336 ${fwcmd} add deny all from 172.16.0.0/12 to any via ${oif} 337 ${fwcmd} add deny all from 192.168.0.0/16 to any via ${oif} 338 339 # Stop draft-manning-dsua-03.txt (1 May 2000) nets (includes RESERVED-1, 340 # DHCP auto-configuration, NET-TEST, MULTICAST (class D), and class E) 341 # on the outside interface 342 ${fwcmd} add deny all from 0.0.0.0/8 to any via ${oif} 343 ${fwcmd} add deny all from 169.254.0.0/16 to any via ${oif} 344 ${fwcmd} add deny all from 192.0.2.0/24 to any via ${oif} 345 ${fwcmd} add deny all from 224.0.0.0/4 to any via ${oif} 346 ${fwcmd} add deny all from 240.0.0.0/4 to any via ${oif} 347 348 if [ -n "$inet6" ]; then 349 # Stop unique local unicast address on the outside interface 350 ${fwcmd} add deny all from fc00::/7 to any via ${oif6} 351 ${fwcmd} add deny all from any to fc00::/7 via ${oif6} 352 353 # Stop site-local on the outside interface 354 ${fwcmd} add deny all from fec0::/10 to any via ${oif6} 355 ${fwcmd} add deny all from any to fec0::/10 via ${oif6} 356 357 # Disallow "internal" addresses to appear on the wire. 358 ${fwcmd} add deny all from ::ffff:0.0.0.0/96 to any \ 359 via ${oif6} 360 ${fwcmd} add deny all from any to ::ffff:0.0.0.0/96 \ 361 via ${oif6} 362 363 # Disallow packets to malicious IPv4 compatible prefix. 364 ${fwcmd} add deny all from ::224.0.0.0/100 to any via ${oif6} 365 ${fwcmd} add deny all from any to ::224.0.0.0/100 via ${oif6} 366 ${fwcmd} add deny all from ::127.0.0.0/104 to any via ${oif6} 367 ${fwcmd} add deny all from any to ::127.0.0.0/104 via ${oif6} 368 ${fwcmd} add deny all from ::0.0.0.0/104 to any via ${oif6} 369 ${fwcmd} add deny all from any to ::0.0.0.0/104 via ${oif6} 370 ${fwcmd} add deny all from ::255.0.0.0/104 to any via ${oif6} 371 ${fwcmd} add deny all from any to ::255.0.0.0/104 via ${oif6} 372 373 ${fwcmd} add deny all from ::0.0.0.0/96 to any via ${oif6} 374 ${fwcmd} add deny all from any to ::0.0.0.0/96 via ${oif6} 375 376 # Disallow packets to malicious 6to4 prefix. 377 ${fwcmd} add deny all from 2002:e000::/20 to any via ${oif6} 378 ${fwcmd} add deny all from any to 2002:e000::/20 via ${oif6} 379 ${fwcmd} add deny all from 2002:7f00::/24 to any via ${oif6} 380 ${fwcmd} add deny all from any to 2002:7f00::/24 via ${oif6} 381 ${fwcmd} add deny all from 2002:0000::/24 to any via ${oif6} 382 ${fwcmd} add deny all from any to 2002:0000::/24 via ${oif6} 383 ${fwcmd} add deny all from 2002:ff00::/24 to any via ${oif6} 384 ${fwcmd} add deny all from any to 2002:ff00::/24 via ${oif6} 385 386 ${fwcmd} add deny all from 2002:0a00::/24 to any via ${oif6} 387 ${fwcmd} add deny all from any to 2002:0a00::/24 via ${oif6} 388 ${fwcmd} add deny all from 2002:ac10::/28 to any via ${oif6} 389 ${fwcmd} add deny all from any to 2002:ac10::/28 via ${oif6} 390 ${fwcmd} add deny all from 2002:c0a8::/32 to any via ${oif6} 391 ${fwcmd} add deny all from any to 2002:c0a8::/32 via ${oif6} 392 393 ${fwcmd} add deny all from ff05::/16 to any via ${oif6} 394 ${fwcmd} add deny all from any to ff05::/16 via ${oif6} 395 fi 396 397 # Allow TCP through if setup succeeded 398 ${fwcmd} add pass tcp from any to any established 399 400 # Allow IP fragments to pass through 401 ${fwcmd} add pass all from any to any frag 402 403 # Allow setup of incoming email 404 ${fwcmd} add pass tcp from any to me 25 setup 405 if [ -n "$inet6" ]; then 406 ${fwcmd} add pass tcp from any to me6 25 setup 407 fi 408 409 # Allow access to our DNS 410 ${fwcmd} add pass tcp from any to me 53 setup 411 ${fwcmd} add pass udp from any to me 53 412 ${fwcmd} add pass udp from me 53 to any 413 if [ -n "$inet6" ]; then 414 ${fwcmd} add pass tcp from any to me6 53 setup 415 ${fwcmd} add pass udp from any to me6 53 416 ${fwcmd} add pass udp from me6 53 to any 417 fi 418 419 # Allow access to our WWW 420 ${fwcmd} add pass tcp from any to me 80 setup 421 if [ -n "$inet6" ]; then 422 ${fwcmd} add pass tcp from any to me6 80 setup 423 fi 424 425 # Reject&Log all setup of incoming connections from the outside 426 ${fwcmd} add deny log ip4 from any to any in via ${oif} setup proto tcp 427 if [ -n "$inet6" ]; then 428 ${fwcmd} add deny log ip6 from any to any in via ${oif6} \ 429 setup proto tcp 430 fi 431 432 # Allow setup of any other TCP connection 433 ${fwcmd} add pass tcp from any to any setup 434 435 # Allow DNS queries out in the world 436 ${fwcmd} add pass udp from me to any 53 keep-state 437 if [ -n "$inet6" ]; then 438 ${fwcmd} add pass udp from me6 to any 53 keep-state 439 fi 440 441 # Allow NTP queries out in the world 442 ${fwcmd} add pass udp from me to any 123 keep-state 443 if [ -n "$inet6" ]; then 444 ${fwcmd} add pass udp from me6 to any 123 keep-state 445 fi 446 447 # Everything else is denied by default, unless the 448 # IPFIREWALL_DEFAULT_TO_ACCEPT option is set in your kernel 449 # config file. 450 ;; 451 452[Ww][Oo][Rr][Kk][Ss][Tt][Aa][Tt][Ii][Oo][Nn]) 453 # Configuration: 454 # firewall_myservices: List of TCP ports on which this host 455 # offers services. 456 # firewall_allowservices: List of IPs which has access to 457 # $firewall_myservices. 458 # firewall_trusted: List of IPv4s which has full access 459 # to this host. Be very carefull 460 # when setting this. This option can 461 # seriously degrade the level of 462 # protection provided by the firewall. 463 # firewall_logdeny: Boolean (YES/NO) specifying if the 464 # default denied packets should be 465 # logged (in /var/log/security). 466 # firewall_nologports: List of TCP/UDP ports for which 467 # denied incomming packets are not 468 # logged. 469 # firewall_trusted_ipv6: List of IPv6s which has full access 470 # to this host. Be very carefull 471 # when setting this. This option can 472 # seriously degrade the level of 473 # protection provided by the firewall. 474 475 # Allow packets for which a state has been built. 476 ${fwcmd} add check-state 477 478 # For services permitted below. 479 ${fwcmd} add pass tcp from me to any established 480 if [ $ipv6_available -eq 0 ]; then 481 ${fwcmd} add pass tcp from me6 to any established 482 fi 483 484 # Allow any connection out, adding state for each. 485 ${fwcmd} add pass tcp from me to any setup keep-state 486 ${fwcmd} add pass udp from me to any keep-state 487 ${fwcmd} add pass icmp from me to any keep-state 488 if [ $ipv6_available -eq 0 ]; then 489 ${fwcmd} add pass tcp from me6 to any setup keep-state 490 ${fwcmd} add pass udp from me6 to any keep-state 491 ${fwcmd} add pass ipv6-icmp from me6 to any keep-state 492 fi 493 494 # Allow DHCP. 495 ${fwcmd} add pass udp from 0.0.0.0 68 to 255.255.255.255 67 out 496 ${fwcmd} add pass udp from any 67 to me 68 in 497 ${fwcmd} add pass udp from any 67 to 255.255.255.255 68 in 498 if [ $ipv6_available -eq 0 ]; then 499 ${fwcmd} add pass udp from fe80::/10 to me6 546 in 500 fi 501 # Some servers will ping the IP while trying to decide if it's 502 # still in use. 503 ${fwcmd} add pass icmp from any to any icmptype 8 504 if [ $ipv6_available -eq 0 ]; then 505 ${fwcmd} add pass ipv6-icmp from any to any icmp6type 128,129 506 fi 507 508 # Allow "mandatory" ICMP in. 509 ${fwcmd} add pass icmp from any to any icmptype 3,4,11 510 if [ $ipv6_available -eq 0 ]; then 511 ${fwcmd} add pass ipv6-icmp from any to any icmp6type 3 512 fi 513 514 # Add permits for this workstations published services below 515 # Only IPs and nets in firewall_allowservices is allowed in. 516 # If you really wish to let anyone use services on your 517 # workstation, then set "firewall_allowservices='any'" in /etc/rc.conf 518 # 519 # Note: We don't use keep-state as that would allow DoS of 520 # our statetable. 521 # You can add 'keep-state' to the lines for slightly 522 # better performance if you fell that DoS of your 523 # workstation won't be a problem. 524 # 525 for i in ${firewall_allowservices} ; do 526 for j in ${firewall_myservices} ; do 527 ${fwcmd} add pass tcp from $i to me $j 528 if [ $ipv6_available -eq 0 ]; then 529 ${fwcmd} add pass tcp from $i to me6 $j 530 fi 531 done 532 done 533 534 # Allow all connections from trusted IPs. 535 # Playing with the content of firewall_trusted could seriously 536 # degrade the level of protection provided by the firewall. 537 for i in ${firewall_trusted} ; do 538 ${fwcmd} add pass ip from $i to me 539 done 540 for i in ${firewall_trusted_ipv6} ; do 541 ${fwcmd} add pass all from $i to me6 542 done 543 544 ${fwcmd} add 65000 count ip from any to any 545 546 # Drop packets to ports where we don't want logging 547 for i in ${firewall_nologports} ; do 548 ${fwcmd} add deny { tcp or udp } from any to any $i in 549 done 550 551 # Broadcasts and muticasts 552 ${fwcmd} add deny ip from any to 255.255.255.255 553 ${fwcmd} add deny ip from any to 224.0.0.0/24 in # XXX 554 555 # Noise from routers 556 ${fwcmd} add deny udp from any to any 520 in 557 558 # Noise from webbrowsing. 559 # The statefull filter is a bit agressive, and will cause some 560 # connection teardowns to be logged. 561 ${fwcmd} add deny tcp from any 80,443 to any 1024-65535 in 562 563 # Deny and (if wanted) log the rest unconditionally. 564 log="" 565 if [ ${firewall_logdeny:-x} = "YES" -o ${firewall_logdeny:-x} = "yes" ] ; then 566 log="log logamount 500" # The default of 100 is too low. 567 sysctl net.inet.ip.fw.verbose=1 >/dev/null 568 fi 569 ${fwcmd} add deny $log ip from any to any 570 ;; 571 572[Cc][Ll][Oo][Ss][Ee][Dd]) 573 ${fwcmd} add 65000 deny ip from any to any 574 ;; 575[Uu][Nn][Kk][Nn][Oo][Ww][Nn]) 576 ;; 577*) 578 if [ -r "${firewall_type}" ]; then 579 ${fwcmd} ${firewall_flags} ${firewall_type} 580 fi 581 ;; 582esac 583