src/initscripts/system/firewall

   1 #!/bin/sh
   2
   3 . /etc/sysconfig/rc
   4 . ${rc_functions}
   5
   6 eval $(/usr/local/bin/readhash /var/ipfire/ppp/settings)
   7 eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
   8 eval $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings)
   9 IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null | /usr/bin/tr -d '\012'`
  10 if [ -z $IFACE ]; then
  11         IFACE="red0"
  12 fi
  13
  14 if [ -f /var/ipfire/red/device ]; then
  15         DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null | /usr/bin/tr -d '\012'`
  16 fi
  17
  18 NAT_MASK="0x0f000000"
  19
  20 IPS_REPEAT_MARK="0x80000000"
  21 IPS_REPEAT_MASK="0x80000000"
  22 IPS_BYPASS_MARK="0x40000000"
  23 IPS_BYPASS_MASK="0x40000000"
  24
  25 IPSET_DB_DIR="/var/lib/location/ipset"
  26
  27 function iptables() {
  28         /sbin/iptables --wait "$@"
  29 }
  30
  31 iptables_init() {
  32         # Flush all rules and delete all custom chains
  33         iptables -F
  34         iptables -t nat -F
  35         iptables -t mangle -F
  36         iptables -t raw -F
  37         iptables -X
  38         iptables -t nat -X
  39         iptables -t mangle -X
  40         iptables -t raw -X
  41
  42         # Set up policies
  43         iptables -P INPUT DROP
  44         iptables -P FORWARD DROP
  45         iptables -P OUTPUT ACCEPT
  46
  47         # Enable TRACE logging to syslog
  48         modprobe nf_log_ipv4
  49         sysctl -q -w net.netfilter.nf_log.2=nf_log_ipv4
  50
  51         # IPS Bypass Chain which stores the BYPASS bit in connection tracking
  52         iptables -N IPSBYPASS
  53         iptables -A IPSBYPASS -j CONNMARK --save-mark --mask "$(( ~IPS_REPEAT_MASK & 0xffffffff ))"
  54
  55         # Jump into bypass chain when the BYPASS bit is set
  56         for chain in INPUT FORWARD OUTPUT; do
  57                 iptables -A "${chain}" -m mark \
  58                         --mark "$(( IPS_REPEAT_MARK | IPS_BYPASS_MARK ))/$(( IPS_REPEAT_MASK | IPS_BYPASS_MASK ))" -j IPSBYPASS
  59         done
  60
  61         # Empty LOG_DROP and LOG_REJECT chains
  62         iptables -N LOG_DROP
  63         iptables -A LOG_DROP   -m limit --limit 10/second -j LOG
  64         iptables -A LOG_DROP   -j DROP
  65         iptables -N LOG_REJECT
  66         iptables -A LOG_REJECT -m limit --limit 10/second -j LOG
  67         iptables -A LOG_REJECT -j REJECT
  68
  69         # This chain will log, then DROPs packets with certain bad combinations
  70         # of flags might indicate a port-scan attempt (xmas, null, etc.)
  71         iptables -N PSCAN
  72         if [ "$DROPPORTSCAN" == "on" ]; then
  73                 iptables -A PSCAN -p tcp  -m limit --limit 10/second -j LOG --log-prefix "DROP_TCP Scan "  -m comment --comment "DROP_TCP PScan"
  74                 iptables -A PSCAN -p udp  -m limit --limit 10/second -j LOG --log-prefix "DROP_UDP Scan "  -m comment --comment "DROP_UDP PScan"
  75                 iptables -A PSCAN -p icmp -m limit --limit 10/second -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
  76                 iptables -A PSCAN -f      -m limit --limit 10/second -j LOG --log-prefix "DROP_FRAG Scan " -m comment --comment "DROP_FRAG PScan"
  77         fi
  78         iptables -A PSCAN -j DROP -m comment --comment "DROP_PScan"
  79
  80         # New tcp packets without SYN set - could well be an obscure type of port scan
  81         # that's not covered above, may just be a broken Windows machine
  82         iptables -N NEWNOTSYN
  83         if [ "$DROPNEWNOTSYN" == "on" ]; then
  84                 iptables -A NEWNOTSYN  -m limit --limit 10/second -j LOG  --log-prefix "DROP_NEWNOTSYN "
  85         fi
  86         iptables -A NEWNOTSYN  -j DROP -m comment --comment "DROP_NEWNOTSYN"
  87
  88         # Log and subsequently drop spoofed packets or "martians", arriving from sources
  89         # on interfaces where we don't expect them
  90         iptables -N SPOOFED_MARTIAN
  91         if [ "$DROPSPOOFEDMARTIAN" == "on" ]; then
  92                 iptables -A SPOOFED_MARTIAN  -m limit --limit 10/second -j LOG  --log-prefix "DROP_SPOOFED_MARTIAN "
  93         fi
  94         iptables -A SPOOFED_MARTIAN -j DROP -m comment --comment "DROP_SPOOFED_MARTIAN"
  95
  96         # Chain to contain all the rules relating to bad TCP flags
  97         iptables -N BADTCP
  98
  99         # Don't check loopback
 100         iptables -A BADTCP -i lo -j RETURN
 101
 102         # Disallow packets frequently used by port-scanners
 103         # NMAP FIN/URG/PSH (XMAS scan)
 104         iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN
 105         # SYN/RST/ACK/FIN/URG
 106         iptables -A BADTCP -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j PSCAN
 107         # ALL/ALL
 108         iptables -A BADTCP -p tcp --tcp-flags ALL ALL -j PSCAN
 109         # FIN Stealth
 110         iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
 111         # SYN/RST (also catches xmas variants that set SYN+RST+...)
 112         iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
 113         # SYN/FIN (QueSO or nmap OS probe)
 114         iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
 115         # Null
 116         iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
 117         # NEW TCP without SYN
 118         iptables -A BADTCP -p tcp ! --syn -m conntrack --ctstate NEW -j NEWNOTSYN
 119
 120         iptables -A INPUT   -p tcp -j BADTCP
 121         iptables -A FORWARD -p tcp -j BADTCP
 122
 123         # Connection tracking chains
 124         iptables -N CTINVALID
 125         if [ "$LOGDROPCTINVALID" == "on" ]; then
 126                 iptables -A CTINVALID  -m limit --limit 10/second -j LOG  --log-prefix "DROP_CTINVALID "
 127         fi
 128         iptables -A CTINVALID  -j DROP -m comment --comment "DROP_CTINVALID"
 129
 130         iptables -N CONNTRACK
 131         iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED -j ACCEPT
 132         iptables -A CONNTRACK -m conntrack --ctstate INVALID -j CTINVALID
 133         iptables -A CONNTRACK -p icmp -m conntrack --ctstate RELATED -j ACCEPT
 134
 135         # Restore any connection marks
 136         iptables -t mangle -A PREROUTING -j CONNMARK --restore-mark
 137
 138         # Fix for braindead ISPs
 139         iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
 140
 141         # CUSTOM chains, can be used by the users themselves
 142         iptables -N CUSTOMINPUT
 143         iptables -A INPUT -j CUSTOMINPUT
 144         iptables -N CUSTOMFORWARD
 145         iptables -A FORWARD -j CUSTOMFORWARD
 146         iptables -N CUSTOMOUTPUT
 147         iptables -A OUTPUT -j CUSTOMOUTPUT
 148         iptables -t nat -N CUSTOMPREROUTING
 149         iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
 150         iptables -t nat -N CUSTOMPOSTROUTING
 151         iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING
 152
 153         # Log and drop any traffic from and to networks known as being hostile, posing
 154         # a technical threat to our users (i. e. listed at Spamhaus DROP et al.)
 155         iptables -N HOSTILE
 156         if [ "$DROPHOSTILE" == "on" ]; then
 157                 # Call ipset and load the list which contains the hostile networks.
 158                 ipset restore < $IPSET_DB_DIR/CC_XD.ipset4
 159
 160                 iptables -A HOSTILE -m limit --limit 10/second -j LOG  --log-prefix "DROP_HOSTILE "
 161                 iptables -A INPUT   -i $IFACE -m set --match-set CC_XD src -j HOSTILE
 162                 iptables -A FORWARD -i $IFACE -m set --match-set CC_XD src -j HOSTILE
 163                 iptables -A FORWARD -o $IFACE -m set --match-set CC_XD dst -j HOSTILE
 164                 iptables -A OUTPUT  -o $IFACE -m set --match-set CC_XD src -j HOSTILE
 165         fi
 166         iptables -A HOSTILE -j DROP -m comment --comment "DROP_HOSTILE"
 167
 168         # IPS (Guardian) chains
 169         iptables -N GUARDIAN
 170         iptables -A INPUT -j GUARDIAN
 171         iptables -A FORWARD -j GUARDIAN
 172
 173         # Block non-established IPsec networks
 174         iptables -N IPSECBLOCK
 175         iptables -A FORWARD -m policy --dir out --pol none -j IPSECBLOCK
 176         iptables -A OUTPUT  -m policy --dir out --pol none -j IPSECBLOCK
 177
 178         # Block OpenVPN transfer networks
 179         iptables -N OVPNBLOCK
 180         iptables -A INPUT   -i tun+ -j OVPNBLOCK
 181         iptables -A FORWARD -i tun+ -j OVPNBLOCK
 182         iptables -A FORWARD -o tun+ -j OVPNBLOCK
 183
 184         # IPS (Suricata) chains
 185         iptables -N IPS_INPUT
 186         iptables -N IPS_FORWARD
 187         iptables -N IPS_OUTPUT
 188
 189         for chain in INPUT FORWARD OUTPUT; do
 190                 iptables -A "${chain}" -m mark --mark "0x0/$(( IPS_REPEAT_MASK | IPS_BYPASS_MASK ))" -j "IPS_${chain}"
 191         done
 192
 193         # OpenVPN transfer network translation
 194         iptables -t nat -N OVPNNAT
 195         iptables -t nat -A POSTROUTING -j OVPNNAT
 196
 197         # IPTV chains for IGMPPROXY
 198         iptables -N IPTVINPUT
 199         iptables -A INPUT -j IPTVINPUT
 200         iptables -N IPTVFORWARD
 201         iptables -A FORWARD -j IPTVFORWARD
 202
 203         # Allow to ping the firewall.
 204         iptables -N ICMPINPUT
 205         iptables -A INPUT -j ICMPINPUT
 206         iptables -A ICMPINPUT -p icmp --icmp-type 8 -j ACCEPT
 207
 208         # Accept everything on loopback
 209         iptables -N LOOPBACK
 210         iptables -A LOOPBACK -i lo -j ACCEPT
 211         iptables -A LOOPBACK -o lo -j ACCEPT
 212
 213         # Filter all packets with loopback addresses on non-loopback interfaces (spoofed)
 214         iptables -A LOOPBACK -s 127.0.0.0/8 -j SPOOFED_MARTIAN
 215         iptables -A LOOPBACK -d 127.0.0.0/8 -j SPOOFED_MARTIAN
 216
 217         for i in INPUT FORWARD OUTPUT; do
 218                 iptables -A ${i} -j LOOPBACK
 219         done
 220
 221         # Captive portal
 222         iptables -N CAPTIVE_PORTAL
 223         iptables -N CAPTIVE_PORTAL_CLIENTS
 224         for i in INPUT FORWARD; do
 225                 iptables -A ${i} -j CAPTIVE_PORTAL
 226         done
 227
 228         # Accept everything connected
 229         for i in INPUT FORWARD OUTPUT; do
 230                 iptables -A ${i} -j CONNTRACK
 231         done
 232
 233         # Allow DHCP
 234         iptables -N DHCPINPUT
 235         iptables -A DHCPINPUT -p udp --sport 68 --dport 67 -j ACCEPT
 236         iptables -A DHCPINPUT -p tcp --sport 68 --dport 67 -j ACCEPT
 237
 238         iptables -N DHCPOUTPUT
 239         iptables -A DHCPOUTPUT -p udp --sport 67 --dport 68 -j ACCEPT
 240         iptables -A DHCPOUTPUT -p tcp --sport 67 --dport 68 -j ACCEPT
 241
 242         # Allow DHCP on GREEN
 243         iptables -N DHCPGREENINPUT
 244         iptables -N DHCPGREENOUTPUT
 245         if [ -n "${GREEN_DEV}" ]; then
 246                 iptables -A INPUT  -i "${GREEN_DEV}" -j DHCPGREENINPUT
 247                 iptables -A OUTPUT -o "${GREEN_DEV}" -j DHCPGREENOUTPUT
 248         fi
 249
 250         # Allow DHCP on BLUE to be turned on/off
 251         iptables -N DHCPBLUEINPUT
 252         iptables -N DHCPBLUEOUTPUT
 253         if [ -n "${BLUE_DEV}" ]; then
 254                 iptables -A INPUT  -i "${BLUE_DEV}" -j DHCPBLUEINPUT
 255                 iptables -A OUTPUT -o "${BLUE_DEV}" -j DHCPBLUEOUTPUT
 256         fi
 257
 258         # Tor (inbound)
 259         iptables -N TOR_INPUT
 260         iptables -A INPUT -j TOR_INPUT
 261
 262         # Location Block
 263         iptables -N LOCATIONBLOCK
 264         iptables -A INPUT -j LOCATIONBLOCK
 265         iptables -A FORWARD -j LOCATIONBLOCK
 266
 267         # trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
 268         iptables -N IPSECINPUT
 269         iptables -N IPSECFORWARD
 270         iptables -N IPSECOUTPUT
 271         iptables -A INPUT -j IPSECINPUT
 272         iptables -A FORWARD -j IPSECFORWARD
 273         iptables -A OUTPUT -j IPSECOUTPUT
 274         iptables -t nat -N IPSECNAT
 275         iptables -t nat -A POSTROUTING -j IPSECNAT
 276
 277         # localhost and ethernet.
 278         # Always allow accessing the web GUI from GREEN.
 279         iptables -N GUIINPUT
 280         iptables -A INPUT -j GUIINPUT
 281         if [ -n "${GREEN_DEV}" ]; then
 282                 iptables -A GUIINPUT -i "${GREEN_DEV}" -p tcp --dport 444 -j ACCEPT
 283         fi
 284
 285         # WIRELESS chains
 286         iptables -N WIRELESSINPUT
 287         iptables -A INPUT -m conntrack --ctstate NEW -j WIRELESSINPUT
 288         iptables -N WIRELESSFORWARD
 289         iptables -A FORWARD -m conntrack --ctstate NEW -j WIRELESSFORWARD
 290
 291         # OpenVPN
 292         iptables -N OVPNINPUT
 293         iptables -A INPUT -j OVPNINPUT
 294
 295         # Tor (outbound)
 296         iptables -N TOR_OUTPUT
 297         iptables -A OUTPUT -j TOR_OUTPUT
 298
 299         # Jump into the actual firewall ruleset.
 300         iptables -N INPUTFW
 301         iptables -A INPUT -j INPUTFW
 302
 303         iptables -N OUTGOINGFW
 304         iptables -A OUTPUT -j OUTGOINGFW
 305
 306         iptables -N FORWARDFW
 307         iptables -A FORWARD -j FORWARDFW
 308
 309         # SNAT rules
 310         iptables -t nat -N NAT_SOURCE
 311         iptables -t nat -A POSTROUTING -j NAT_SOURCE
 312
 313         # Captive Portal
 314         iptables -t nat -N CAPTIVE_PORTAL
 315         iptables -t nat -A PREROUTING -j CAPTIVE_PORTAL
 316
 317         # Custom prerouting chains (for transparent proxy)
 318         iptables -t nat -N SQUID
 319         iptables -t nat -A PREROUTING -j SQUID
 320
 321         # DNAT rules
 322         iptables -t nat -N NAT_DESTINATION
 323         iptables -t nat -A PREROUTING -j NAT_DESTINATION
 324         iptables -t nat -A OUTPUT -j NAT_DESTINATION
 325
 326         iptables -t mangle -N NAT_DESTINATION
 327         iptables -t mangle -A PREROUTING -j NAT_DESTINATION
 328
 329         iptables -t nat -N NAT_DESTINATION_FIX
 330         iptables -t nat -A POSTROUTING -j NAT_DESTINATION_FIX
 331
 332         if [ -n "${GREEN_ADDRESS}" ]; then
 333                 iptables -t nat -A NAT_DESTINATION_FIX \
 334                         -m mark --mark "0x01000000/${NAT_MASK}" -j SNAT --to-source "${GREEN_ADDRESS}"
 335         fi
 336
 337         if [ -n "${BLUE_ADDRESS}" ]; then
 338                 iptables -t nat -A NAT_DESTINATION_FIX \
 339                         -m mark --mark "0x02000000/${NAT_MASK}" -j SNAT --to-source "${BLUE_ADDRESS}"
 340         fi
 341
 342         if [ -n "${ORANGE_ADDRESS}" ]; then
 343                 iptables -t nat -A NAT_DESTINATION_FIX \
 344                         -m mark --mark "0x04000000/${NAT_MASK}" -j SNAT --to-source "${ORANGE_ADDRESS}"
 345         fi
 346
 347         # RED chain, used for the red interface
 348         iptables -N REDINPUT
 349         iptables -A INPUT -j REDINPUT
 350         iptables -N REDFORWARD
 351         iptables -A FORWARD -j REDFORWARD
 352         iptables -t nat -N REDNAT
 353         iptables -t nat -A POSTROUTING -j REDNAT
 354
 355         # Populate IPsec chains
 356         /usr/lib/firewall/ipsec-policy
 357
 358         # Apply OpenVPN firewall rules
 359         /usr/local/bin/openvpnctrl --firewall-rules
 360
 361         # run wirelessctrl
 362         /usr/local/bin/wirelessctrl
 363
 364         # run captivectrl
 365         /usr/local/bin/captivectrl
 366
 367         # POLICY CHAIN
 368         iptables -N POLICYIN
 369         iptables -A INPUT -j POLICYIN
 370         iptables -N POLICYFWD
 371         iptables -A FORWARD -j POLICYFWD
 372         iptables -N POLICYOUT
 373         iptables -A OUTPUT -j POLICYOUT
 374
 375         # Initialize firewall policies.
 376         /usr/sbin/firewall-policy
 377
 378         # Install firewall rules for the red interface.
 379         iptables_red_up
 380
 381         # If red has not been brought up yet, we will
 382         # add the blocking rules for MASQUERADE
 383         if [ ! -e "/var/ipfire/red/active" ]; then
 384                 iptables_red_down
 385         fi
 386 }
 387
 388 iptables_red_up() {
 389         iptables -F REDINPUT
 390         iptables -F REDFORWARD
 391         iptables -t nat -F REDNAT
 392
 393         # Prohibit spoofing our own IP address on RED
 394         if [ -f /var/ipfire/red/active ]; then
 395                 REDIP="$( cat /var/ipfire/red/local-ipaddress )";
 396
 397                 if [ "$IFACE" != "" ]; then
 398                         iptables -A REDINPUT -s $REDIP -i $IFACE -j SPOOFED_MARTIAN
 399                 elif [ "$DEVICE" != "" ]; then
 400                         iptables -A REDINPUT -s $REDIP -i $DEVICE -j SPOOFED_MARTIAN
 401                 fi
 402         fi
 403
 404         # PPPoE / PPTP Device
 405         if [ "$IFACE" != "" ]; then
 406                 # PPPoE / PPTP
 407                 if [ "$DEVICE" != "" ]; then
 408                         iptables -A REDINPUT -i $DEVICE -j ACCEPT
 409                 fi
 410                 if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
 411                         if [ "$RED_DEV" != "" ]; then
 412                                 iptables -A REDINPUT -i $RED_DEV -j ACCEPT
 413                         fi
 414                 fi
 415         fi
 416
 417         # PPTP over DHCP
 418         if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
 419                 iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
 420                 iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
 421         fi
 422
 423         if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
 424                 # DHCP
 425                 if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
 426                         iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
 427                         iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
 428                 fi
 429                 if [ "$METHOD" == "DHCP"  -a "$PROTOCOL" == "RFC1483" ]; then
 430                         iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
 431                         iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
 432                 fi
 433
 434                 # Outgoing masquerading (don't masqerade IPsec)
 435                 iptables -t nat -A REDNAT -m policy --pol ipsec --dir=out -o "${IFACE}" -j RETURN
 436
 437                 if [ "${IFACE}" = "${GREEN_DEV}" ]; then
 438                         iptables -t nat -A REDNAT -i "${GREEN_DEV}" -o "${IFACE}" -j RETURN
 439                 fi
 440
 441                 local NO_MASQ_NETWORKS
 442
 443                 if [ "${MASQUERADE_GREEN}" = "off" ]; then
 444                         NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${GREEN_NETADDRESS}/${GREEN_NETMASK}"
 445                 fi
 446
 447                 if [ "${MASQUERADE_BLUE}" = "off" ]; then
 448                         NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${BLUE_NETADDRESS}/${BLUE_NETMASK}"
 449                 fi
 450
 451                 if [ "${MASQUERADE_ORANGE}" = "off" ]; then
 452                         NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${ORANGE_NETADDRESS}/${ORANGE_NETMASK}"
 453                 fi
 454
 455                 local network
 456                 for network in ${NO_MASQ_NETWORKS}; do
 457                         iptables -t nat -A REDNAT -s "${network}" -o "${IFACE}" -j RETURN
 458                 done
 459
 460                 # Masquerade everything else
 461                 iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
 462         fi
 463
 464         # Reload all rules.
 465         /usr/local/bin/firewallctrl
 466 }
 467
 468 iptables_red_down() {
 469         # Prohibit packets to reach the masquerading rule
 470         # while the WAN interface is down - this is required to
 471         # circumvent udp related NAT issues
 472         # http://forum.ipfire.org/index.php?topic=11127.0
 473         if [ -n "${IFACE}" ]; then
 474                 iptables -F REDFORWARD
 475                 iptables -A REDFORWARD -o "${IFACE}" -j DROP
 476         fi
 477
 478         # Reload all rules.
 479         /usr/local/bin/firewallctrl
 480 }
 481
 482 # See how we were called.
 483 case "$1" in
 484   start)
 485         boot_mesg "Setting up firewall"
 486         iptables_init
 487         evaluate_retval
 488         ;;
 489   reload|up)
 490         boot_mesg "Reloading firewall"
 491         iptables_red_up
 492         evaluate_retval
 493         ;;
 494   down)
 495         boot_mesg "Disabling firewall access to RED"
 496         iptables_red_down
 497         evaluate_retval
 498         ;;
 499   restart)
 500         $0 start
 501         ;;
 502   *)
 503         echo "Usage: $0 {start|reload|restart}"
 504         exit 1
 505         ;;
 506 esac
 507
 508 exit 0