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 $IFACE ]; then
  11         IFACE="red0"
  12 fi
  13
  14 if [ -f /var/ipfire/red/device ]; then
  15         DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null | /usr/bin/tr -d '\012'`
  16 fi
  17
  18 NAT_MASK="0x0f000000"
  19
  20 IPS_REPEAT_MARK="0x80000000"
  21 IPS_REPEAT_MASK="0x80000000"
  22 IPS_BYPASS_MARK="0x40000000"
  23 IPS_BYPASS_MASK="0x40000000"
  24
  25 function iptables() {
  26         /sbin/iptables --wait "$@"
  27 }
  28
  29 iptables_init() {
  30         # Flush all rules and delete all custom chains
  31         iptables -F
  32         iptables -t nat -F
  33         iptables -t mangle -F
  34         iptables -t raw -F
  35         iptables -X
  36         iptables -t nat -X
  37         iptables -t mangle -X
  38         iptables -t raw -X
  39
  40         # Set up policies
  41         iptables -P INPUT DROP
  42         iptables -P FORWARD DROP
  43         iptables -P OUTPUT ACCEPT
  44
  45         # Enable TRACE logging to syslog
  46         modprobe nf_log_ipv4
  47         sysctl -q -w net.netfilter.nf_log.2=nf_log_ipv4
  48
  49         # IPS Bypass Chain which stores the BYPASS bit in connection tracking
  50         iptables -N IPSBYPASS
  51         iptables -A IPSBYPASS -j CONNMARK --save-mark --mask "$(( ~IPS_REPEAT_MASK & 0xffffffff ))"
  52
  53         # Jump into bypass chain when the BYPASS bit is set
  54         for chain in INPUT FORWARD OUTPUT; do
  55                 iptables -A "${chain}" -m mark \
  56                         --mark "$(( IPS_REPEAT_MARK | IPS_BYPASS_MARK ))/$(( IPS_REPEAT_MASK | IPS_BYPASS_MASK ))" -j IPSBYPASS
  57         done
  58
  59         # Empty LOG_DROP and LOG_REJECT chains
  60         iptables -N LOG_DROP
  61         iptables -A LOG_DROP   -m limit --limit 10/second -j LOG
  62         iptables -A LOG_DROP   -j DROP
  63         iptables -N LOG_REJECT
  64         iptables -A LOG_REJECT -m limit --limit 10/second -j LOG
  65         iptables -A LOG_REJECT -j REJECT
  66
  67         # This chain will log, then DROPs packets with certain bad combinations
  68         # of flags might indicate a port-scan attempt (xmas, null, etc.)
  69         iptables -N PSCAN
  70         if [ "$DROPPORTSCAN" == "on" ]; then
  71                 iptables -A PSCAN -p tcp  -m limit --limit 10/second -j LOG --log-prefix "DROP_TCP Scan "  -m comment --comment "DROP_TCP PScan"
  72                 iptables -A PSCAN -p udp  -m limit --limit 10/second -j LOG --log-prefix "DROP_UDP Scan "  -m comment --comment "DROP_UDP PScan"
  73                 iptables -A PSCAN -p icmp -m limit --limit 10/second -j LOG --log-prefix "DROP_ICMP Scan " -m comment --comment "DROP_ICMP PScan"
  74                 iptables -A PSCAN -f      -m limit --limit 10/second -j LOG --log-prefix "DROP_FRAG Scan " -m comment --comment "DROP_FRAG PScan"
  75         fi
  76         iptables -A PSCAN -j DROP -m comment --comment "DROP_PScan"
  77
  78         # New tcp packets without SYN set - could well be an obscure type of port scan
  79         # that's not covered above, may just be a broken Windows machine
  80         iptables -N NEWNOTSYN
  81         if [ "$DROPNEWNOTSYN" == "on" ]; then
  82                 iptables -A NEWNOTSYN  -m limit --limit 10/second -j LOG  --log-prefix "DROP_NEWNOTSYN "
  83         fi
  84         iptables -A NEWNOTSYN  -j DROP -m comment --comment "DROP_NEWNOTSYN"
  85
  86         # Log and subsequently drop spoofed packets or "martians", arriving from sources
  87         # on interfaces where we don't expect them
  88         iptables -N SPOOFED_MARTIAN
  89         if [ "$DROPSPOOFEDMARTIAN" == "on" ]; then
  90                 iptables -A SPOOFED_MARTIAN  -m limit --limit 10/second -j LOG  --log-prefix "DROP_SPOOFED_MARTIAN "
  91         fi
  92         iptables -A SPOOFED_MARTIAN -j DROP -m comment --comment "DROP_SPOOFED_MARTIAN"
  93
  94         # Chain to contain all the rules relating to bad TCP flags
  95         iptables -N BADTCP
  96
  97         # Don't check loopback
  98         iptables -A BADTCP -i lo -j RETURN
  99
 100         # Disallow packets frequently used by port-scanners
 101         # NMAP FIN/URG/PSH (XMAS scan)
 102         iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN
 103         # SYN/RST/ACK/FIN/URG
 104         iptables -A BADTCP -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j PSCAN
 105         # ALL/ALL
 106         iptables -A BADTCP -p tcp --tcp-flags ALL ALL -j PSCAN
 107         # FIN Stealth
 108         iptables -A BADTCP -p tcp --tcp-flags ALL FIN -j PSCAN
 109         # SYN/RST (also catches xmas variants that set SYN+RST+...)
 110         iptables -A BADTCP -p tcp --tcp-flags SYN,RST SYN,RST -j PSCAN
 111         # SYN/FIN (QueSO or nmap OS probe)
 112         iptables -A BADTCP -p tcp --tcp-flags SYN,FIN SYN,FIN -j PSCAN
 113         # Null
 114         iptables -A BADTCP -p tcp --tcp-flags ALL NONE -j PSCAN
 115         # NEW TCP without SYN
 116         iptables -A BADTCP -p tcp ! --syn -m conntrack --ctstate NEW -j NEWNOTSYN
 117
 118         iptables -A INPUT   -p tcp -j BADTCP
 119         iptables -A FORWARD -p tcp -j BADTCP
 120
 121         # Connection tracking chains
 122         iptables -N CTINVALID
 123         if [ "$LOGDROPCTINVALID" == "on" ]; then
 124                 iptables -A CTINVALID  -m limit --limit 10/second -j LOG  --log-prefix "DROP_CTINVALID "
 125         fi
 126         iptables -A CTINVALID  -j DROP -m comment --comment "DROP_CTINVALID"
 127
 128         iptables -N CONNTRACK
 129         iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED -j ACCEPT
 130         iptables -A CONNTRACK -m conntrack --ctstate INVALID -j CTINVALID
 131         iptables -A CONNTRACK -p icmp -m conntrack --ctstate RELATED -j ACCEPT
 132
 133         # Restore any connection marks
 134         iptables -t mangle -A PREROUTING -j CONNMARK --restore-mark
 135
 136         # Fix for braindead ISPs
 137         iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
 138
 139         # CUSTOM chains, can be used by the users themselves
 140         iptables -N CUSTOMINPUT
 141         iptables -A INPUT -j CUSTOMINPUT
 142         iptables -N CUSTOMFORWARD
 143         iptables -A FORWARD -j CUSTOMFORWARD
 144         iptables -N CUSTOMOUTPUT
 145         iptables -A OUTPUT -j CUSTOMOUTPUT
 146         iptables -t nat -N CUSTOMPREROUTING
 147         iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
 148         iptables -t nat -N CUSTOMPOSTROUTING
 149         iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING
 150
 151         # Log and drop any traffic from and to networks known as being hostile, posing
 152         # a technical threat to our users (i. e. listed at Spamhaus DROP et al.)
 153         iptables -N HOSTILE
 154         if [ "$DROPHOSTILE" == "on" ]; then
 155                 iptables -A HOSTILE -m limit --limit 10/second -j LOG  --log-prefix "DROP_HOSTILE "
 156                 iptables -A INPUT   -i $IFACE -m geoip --src-cc XD -j HOSTILE
 157                 iptables -A FORWARD -i $IFACE -m geoip --src-cc XD -j HOSTILE
 158                 iptables -A FORWARD -o $IFACE -m geoip --dst-cc XD -j HOSTILE
 159                 iptables -A OUTPUT  -o $IFACE -m geoip --src-cc XD -j HOSTILE
 160         fi
 161         iptables -A HOSTILE -j DROP -m comment --comment "DROP_HOSTILE"
 162
 163         # P2PBLOCK
 164         iptables -N P2PBLOCK
 165         iptables -A INPUT -j P2PBLOCK
 166         iptables -A FORWARD -j P2PBLOCK
 167         iptables -A OUTPUT -j P2PBLOCK
 168
 169         # IPS (Guardian) chains
 170         iptables -N GUARDIAN
 171         iptables -A INPUT -j GUARDIAN
 172         iptables -A FORWARD -j GUARDIAN
 173
 174         # Block non-established IPsec networks
 175         iptables -N IPSECBLOCK
 176         iptables -A FORWARD -m policy --dir out --pol none -j IPSECBLOCK
 177         iptables -A OUTPUT  -m policy --dir out --pol none -j IPSECBLOCK
 178
 179         # Block OpenVPN transfer networks
 180         iptables -N OVPNBLOCK
 181         iptables -A INPUT   -i tun+ -j OVPNBLOCK
 182         iptables -A FORWARD -i tun+ -j OVPNBLOCK
 183         iptables -A FORWARD -o tun+ -j OVPNBLOCK
 184
 185         # IPS (Suricata) chains
 186         iptables -N IPS_INPUT
 187         iptables -N IPS_FORWARD
 188         iptables -N IPS_OUTPUT
 189
 190         for chain in INPUT FORWARD OUTPUT; do
 191                 iptables -A "${chain}" -m mark --mark "0x0/$(( IPS_REPEAT_MASK | IPS_BYPASS_MASK ))" -j "IPS_${chain}"
 192         done
 193
 194         # OpenVPN transfer network translation
 195         iptables -t nat -N OVPNNAT
 196         iptables -t nat -A POSTROUTING -j OVPNNAT
 197
 198         # IPTV chains for IGMPPROXY
 199         iptables -N IPTVINPUT
 200         iptables -A INPUT -j IPTVINPUT
 201         iptables -N IPTVFORWARD
 202         iptables -A FORWARD -j IPTVFORWARD
 203
 204         # Allow to ping the firewall.
 205         iptables -N ICMPINPUT
 206         iptables -A INPUT -j ICMPINPUT
 207         iptables -A ICMPINPUT -p icmp --icmp-type 8 -j ACCEPT
 208
 209         # Accept everything on loopback
 210         iptables -N LOOPBACK
 211         iptables -A LOOPBACK -i lo -j ACCEPT
 212         iptables -A LOOPBACK -o lo -j ACCEPT
 213
 214         # Filter all packets with loopback addresses on non-loopback interfaces (spoofed)
 215         iptables -A LOOPBACK -s 127.0.0.0/8 -j SPOOFED_MARTIAN
 216         iptables -A LOOPBACK -d 127.0.0.0/8 -j SPOOFED_MARTIAN
 217
 218         for i in INPUT FORWARD OUTPUT; do
 219                 iptables -A ${i} -j LOOPBACK
 220         done
 221
 222         # Captive portal
 223         iptables -N CAPTIVE_PORTAL
 224         iptables -N CAPTIVE_PORTAL_CLIENTS
 225         for i in INPUT FORWARD; do
 226                 iptables -A ${i} -j CAPTIVE_PORTAL
 227         done
 228
 229         # Accept everything connected
 230         for i in INPUT FORWARD OUTPUT; do
 231                 iptables -A ${i} -j CONNTRACK
 232         done
 233
 234         # Allow DHCP
 235         iptables -N DHCPINPUT
 236         iptables -A DHCPINPUT -p udp --sport 68 --dport 67 -j ACCEPT
 237         iptables -A DHCPINPUT -p tcp --sport 68 --dport 67 -j ACCEPT
 238
 239         iptables -N DHCPOUTPUT
 240         iptables -A DHCPOUTPUT -p udp --sport 67 --dport 68 -j ACCEPT
 241         iptables -A DHCPOUTPUT -p tcp --sport 67 --dport 68 -j ACCEPT
 242
 243         # Allow DHCP on GREEN
 244         iptables -N DHCPGREENINPUT
 245         iptables -N DHCPGREENOUTPUT
 246         if [ -n "${GREEN_DEV}" ]; then
 247                 iptables -A INPUT  -i "${GREEN_DEV}" -j DHCPGREENINPUT
 248                 iptables -A OUTPUT -o "${GREEN_DEV}" -j DHCPGREENOUTPUT
 249         fi
 250
 251         # Allow DHCP on BLUE to be turned on/off
 252         iptables -N DHCPBLUEINPUT
 253         iptables -N DHCPBLUEOUTPUT
 254         if [ -n "${BLUE_DEV}" ]; then
 255                 iptables -A INPUT  -i "${BLUE_DEV}" -j DHCPBLUEINPUT
 256                 iptables -A OUTPUT -o "${BLUE_DEV}" -j DHCPBLUEOUTPUT
 257         fi
 258
 259         # Tor (inbound)
 260         iptables -N TOR_INPUT
 261         iptables -A INPUT -j TOR_INPUT
 262
 263         # Location Block
 264         iptables -N LOCATIONBLOCK
 265         iptables -A INPUT -j LOCATIONBLOCK
 266         iptables -A FORWARD -j LOCATIONBLOCK
 267
 268         # trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
 269         iptables -N IPSECINPUT
 270         iptables -N IPSECFORWARD
 271         iptables -N IPSECOUTPUT
 272         iptables -A INPUT -j IPSECINPUT
 273         iptables -A FORWARD -j IPSECFORWARD
 274         iptables -A OUTPUT -j IPSECOUTPUT
 275         iptables -t nat -N IPSECNAT
 276         iptables -t nat -A POSTROUTING -j IPSECNAT
 277
 278         # localhost and ethernet.
 279         # Always allow accessing the web GUI from GREEN.
 280         iptables -N GUIINPUT
 281         iptables -A INPUT -j GUIINPUT
 282         if [ -n "${GREEN_DEV}" ]; then
 283                 iptables -A GUIINPUT -i "${GREEN_DEV}" -p tcp --dport 444 -j ACCEPT
 284         fi
 285
 286         # WIRELESS chains
 287         iptables -N WIRELESSINPUT
 288         iptables -A INPUT -m conntrack --ctstate NEW -j WIRELESSINPUT
 289         iptables -N WIRELESSFORWARD
 290         iptables -A FORWARD -m conntrack --ctstate NEW -j WIRELESSFORWARD
 291
 292         # OpenVPN
 293         iptables -N OVPNINPUT
 294         iptables -A INPUT -j OVPNINPUT
 295
 296         # Tor (outbound)
 297         iptables -N TOR_OUTPUT
 298         iptables -A OUTPUT -j TOR_OUTPUT
 299
 300         # Jump into the actual firewall ruleset.
 301         iptables -N INPUTFW
 302         iptables -A INPUT -j INPUTFW
 303
 304         iptables -N OUTGOINGFW
 305         iptables -A OUTPUT -j OUTGOINGFW
 306
 307         iptables -N FORWARDFW
 308         iptables -A FORWARD -j FORWARDFW
 309
 310         # SNAT rules
 311         iptables -t nat -N NAT_SOURCE
 312         iptables -t nat -A POSTROUTING -j NAT_SOURCE
 313
 314         # Captive Portal
 315         iptables -t nat -N CAPTIVE_PORTAL
 316         iptables -t nat -A PREROUTING -j CAPTIVE_PORTAL
 317
 318         # Custom prerouting chains (for transparent proxy)
 319         iptables -t nat -N SQUID
 320         iptables -t nat -A PREROUTING -j SQUID
 321
 322         # DNAT rules
 323         iptables -t nat -N NAT_DESTINATION
 324         iptables -t nat -A PREROUTING -j NAT_DESTINATION
 325         iptables -t nat -A OUTPUT -j NAT_DESTINATION
 326
 327         iptables -t mangle -N NAT_DESTINATION
 328         iptables -t mangle -A PREROUTING -j NAT_DESTINATION
 329
 330         iptables -t nat -N NAT_DESTINATION_FIX
 331         iptables -t nat -A POSTROUTING -j NAT_DESTINATION_FIX
 332
 333         if [ -n "${GREEN_ADDRESS}" ]; then
 334                 iptables -t nat -A NAT_DESTINATION_FIX \
 335                         -m mark --mark "0x01000000/${NAT_MASK}" -j SNAT --to-source "${GREEN_ADDRESS}"
 336         fi
 337
 338         if [ -n "${BLUE_ADDRESS}" ]; then
 339                 iptables -t nat -A NAT_DESTINATION_FIX \
 340                         -m mark --mark "0x02000000/${NAT_MASK}" -j SNAT --to-source "${BLUE_ADDRESS}"
 341         fi
 342
 343         if [ -n "${ORANGE_ADDRESS}" ]; then
 344                 iptables -t nat -A NAT_DESTINATION_FIX \
 345                         -m mark --mark "0x04000000/${NAT_MASK}" -j SNAT --to-source "${ORANGE_ADDRESS}"
 346         fi
 347
 348         # RED chain, used for the red interface
 349         iptables -N REDINPUT
 350         iptables -A INPUT -j REDINPUT
 351         iptables -N REDFORWARD
 352         iptables -A FORWARD -j REDFORWARD
 353         iptables -t nat -N REDNAT
 354         iptables -t nat -A POSTROUTING -j REDNAT
 355
 356         # Populate IPsec chains
 357         /usr/lib/firewall/ipsec-policy
 358
 359         # Apply OpenVPN firewall rules
 360         /usr/local/bin/openvpnctrl --firewall-rules
 361
 362         # run wirelessctrl
 363         /usr/local/bin/wirelessctrl
 364
 365         # run captivectrl
 366         /usr/local/bin/captivectrl
 367
 368         # POLICY CHAIN
 369         iptables -N POLICYIN
 370         iptables -A INPUT -j POLICYIN
 371         iptables -N POLICYFWD
 372         iptables -A FORWARD -j POLICYFWD
 373         iptables -N POLICYOUT
 374         iptables -A OUTPUT -j POLICYOUT
 375
 376         # Initialize firewall policies.
 377         /usr/sbin/firewall-policy
 378
 379         # Install firewall rules for the red interface.
 380         iptables_red_up
 381
 382         # If red has not been brought up yet, we will
 383         # add the blocking rules for MASQUERADE
 384         if [ ! -e "/var/ipfire/red/active" ]; then
 385                 iptables_red_down
 386         fi
 387 }
 388
 389 iptables_red_up() {
 390         iptables -F REDINPUT
 391         iptables -F REDFORWARD
 392         iptables -t nat -F REDNAT
 393
 394         # Prohibit spoofing our own IP address on RED
 395         if [ -f /var/ipfire/red/active ]; then
 396                 REDIP="$( cat /var/ipfire/red/local-ipaddress )";
 397
 398                 if [ "$IFACE" != "" ]; then
 399                         iptables -A REDINPUT -s $REDIP -i $IFACE -j SPOOFED_MARTIAN
 400                 elif [ "$DEVICE" != "" ]; then
 401                         iptables -A REDINPUT -s $REDIP -i $DEVICE -j SPOOFED_MARTIAN
 402                 fi
 403         fi
 404
 405         # PPPoE / PPTP Device
 406         if [ "$IFACE" != "" ]; then
 407                 # PPPoE / PPTP
 408                 if [ "$DEVICE" != "" ]; then
 409                         iptables -A REDINPUT -i $DEVICE -j ACCEPT
 410                 fi
 411                 if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
 412                         if [ "$RED_DEV" != "" ]; then
 413                                 iptables -A REDINPUT -i $RED_DEV -j ACCEPT
 414                         fi
 415                 fi
 416         fi
 417
 418         # PPTP over DHCP
 419         if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
 420                 iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
 421                 iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
 422         fi
 423
 424         if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
 425                 # DHCP
 426                 if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
 427                         iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
 428                         iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
 429                 fi
 430                 if [ "$METHOD" == "DHCP"  -a "$PROTOCOL" == "RFC1483" ]; then
 431                         iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
 432                         iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
 433                 fi
 434
 435                 # Outgoing masquerading (don't masqerade IPsec)
 436                 iptables -t nat -A REDNAT -m policy --pol ipsec --dir=out -o "${IFACE}" -j RETURN
 437
 438                 if [ "${IFACE}" = "${GREEN_DEV}" ]; then
 439                         iptables -t nat -A REDNAT -i "${GREEN_DEV}" -o "${IFACE}" -j RETURN
 440                 fi
 441
 442                 local NO_MASQ_NETWORKS
 443
 444                 if [ "${MASQUERADE_GREEN}" = "off" ]; then
 445                         NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${GREEN_NETADDRESS}/${GREEN_NETMASK}"
 446                 fi
 447
 448                 if [ "${MASQUERADE_BLUE}" = "off" ]; then
 449                         NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${BLUE_NETADDRESS}/${BLUE_NETMASK}"
 450                 fi
 451
 452                 if [ "${MASQUERADE_ORANGE}" = "off" ]; then
 453                         NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${ORANGE_NETADDRESS}/${ORANGE_NETMASK}"
 454                 fi
 455
 456                 local network
 457                 for network in ${NO_MASQ_NETWORKS}; do
 458                         iptables -t nat -A REDNAT -s "${network}" -o "${IFACE}" -j RETURN
 459                 done
 460
 461                 # Masquerade everything else
 462                 iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
 463         fi
 464
 465         # Reload all rules.
 466         /usr/local/bin/firewallctrl
 467 }
 468
 469 iptables_red_down() {
 470         # Prohibit packets to reach the masquerading rule
 471         # while the WAN interface is down - this is required to
 472         # circumvent udp related NAT issues
 473         # http://forum.ipfire.org/index.php?topic=11127.0
 474         if [ -n "${IFACE}" ]; then
 475                 iptables -F REDFORWARD
 476                 iptables -A REDFORWARD -o "${IFACE}" -j DROP
 477         fi
 478
 479         # Reload all rules.
 480         /usr/local/bin/firewallctrl
 481 }
 482
 483 # See how we were called.
 484 case "$1" in
 485   start)
 486         boot_mesg "Setting up firewall"
 487         iptables_init
 488         evaluate_retval
 489         ;;
 490   reload|up)
 491         boot_mesg "Reloading firewall"
 492         iptables_red_up
 493         evaluate_retval
 494         ;;
 495   down)
 496         boot_mesg "Disabling firewall access to RED"
 497         iptables_red_down
 498         evaluate_retval
 499         ;;
 500   restart)
 501         $0 start
 502         ;;
 503   *)
 504         echo "Usage: $0 {start|reload|restart}"
 505         exit 1
 506         ;;
 507 esac
 508
 509 exit 0