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 $(/usr/local/bin/readhash /var/ipfire/optionsfw/settings)
   9 IFACE=`/bin/cat /var/ipfire/red/iface 2> /dev/null | /usr/bin/tr -d '\012'`
  10
  11 if [ -f /var/ipfire/red/device ]; then
  12         DEVICE=`/bin/cat /var/ipfire/red/device 2> /dev/null | /usr/bin/tr -d '\012'`
  13 fi
  14
  15 NAT_MASK="0x0f000000"
  16
  17 IPS_REPEAT_MARK="0x80000000"
  18 IPS_REPEAT_MASK="0x80000000"
  19 IPS_BYPASS_MARK="0x40000000"
  20 IPS_BYPASS_MASK="0x40000000"
  21
  22 function iptables() {
  23         /sbin/iptables --wait "$@"
  24 }
  25
  26 iptables_init() {
  27         # Flush all rules and delete all custom chains
  28         iptables -F
  29         iptables -t nat -F
  30         iptables -t mangle -F
  31         iptables -t raw -F
  32         iptables -X
  33         iptables -t nat -X
  34         iptables -t mangle -X
  35         iptables -t raw -X
  36
  37         # Set up policies
  38         iptables -P INPUT DROP
  39         iptables -P FORWARD DROP
  40         iptables -P OUTPUT ACCEPT
  41
  42         # Ensure the xt_geoip module is always loaded (#12767)
  43         modprobe xt_geoip
  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 CONNTRACK
 123         iptables -A CONNTRACK -m conntrack --ctstate ESTABLISHED -j ACCEPT
 124         iptables -A CONNTRACK -m conntrack --ctstate INVALID -j LOG_DROP
 125         iptables -A CONNTRACK -p icmp -m conntrack --ctstate RELATED -j ACCEPT
 126
 127         # Restore any connection marks
 128         iptables -t mangle -A PREROUTING -j CONNMARK --restore-mark
 129
 130         # Fix for braindead ISPs
 131         iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
 132
 133         # CUSTOM chains, can be used by the users themselves
 134         iptables -N CUSTOMINPUT
 135         iptables -A INPUT -j CUSTOMINPUT
 136         iptables -N CUSTOMFORWARD
 137         iptables -A FORWARD -j CUSTOMFORWARD
 138         iptables -N CUSTOMOUTPUT
 139         iptables -A OUTPUT -j CUSTOMOUTPUT
 140         iptables -t nat -N CUSTOMPREROUTING
 141         iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
 142         iptables -t nat -N CUSTOMPOSTROUTING
 143         iptables -t nat -A POSTROUTING -j CUSTOMPOSTROUTING
 144
 145         # Log and drop any traffic from and to networks known as being hostile, posing
 146         # a technical threat to our users (i. e. listed at Spamhaus DROP et al.)
 147         iptables -N HOSTILE
 148         if [ "$DROPHOSTILE" == "on" ]; then
 149                 iptables -A HOSTILE -m limit --limit 10/second -j LOG  --log-prefix "DROP_HOSTILE "
 150                 iptables -A INPUT   -i $IFACE -m geoip --src-cc XD -j HOSTILE
 151                 iptables -A FORWARD -i $IFACE -m geoip --src-cc XD -j HOSTILE
 152                 iptables -A FORWARD -o $IFACE -m geoip --dst-cc XD -j HOSTILE
 153                 iptables -A OUTPUT  -o $IFACE -m geoip --src-cc XD -j HOSTILE
 154         fi
 155         iptables -A HOSTILE -j DROP -m comment --comment "DROP_HOSTILE"
 156
 157         # P2PBLOCK
 158         iptables -N P2PBLOCK
 159         iptables -A INPUT -j P2PBLOCK
 160         iptables -A FORWARD -j P2PBLOCK
 161         iptables -A OUTPUT -j P2PBLOCK
 162
 163         # IPS (Guardian) chains
 164         iptables -N GUARDIAN
 165         iptables -A INPUT -j GUARDIAN
 166         iptables -A FORWARD -j GUARDIAN
 167
 168         # Block non-established IPsec networks
 169         iptables -N IPSECBLOCK
 170         iptables -A FORWARD -m policy --dir out --pol none -j IPSECBLOCK
 171         iptables -A OUTPUT  -m policy --dir out --pol none -j IPSECBLOCK
 172
 173         # Block OpenVPN transfer networks
 174         iptables -N OVPNBLOCK
 175         iptables -A INPUT   -i tun+ -j OVPNBLOCK
 176         iptables -A FORWARD -i tun+ -j OVPNBLOCK
 177         iptables -A FORWARD -o tun+ -j OVPNBLOCK
 178
 179         # IPS (Suricata) chains
 180         iptables -N IPS_INPUT
 181         iptables -N IPS_FORWARD
 182         iptables -N IPS_OUTPUT
 183
 184         for chain in INPUT FORWARD OUTPUT; do
 185                 iptables -A "${chain}" -m mark --mark "0x0/$(( IPS_REPEAT_MASK | IPS_BYPASS_MASK ))" -j "IPS_${chain}"
 186         done
 187
 188         # OpenVPN transfer network translation
 189         iptables -t nat -N OVPNNAT
 190         iptables -t nat -A POSTROUTING -j OVPNNAT
 191
 192         # IPTV chains for IGMPPROXY
 193         iptables -N IPTVINPUT
 194         iptables -A INPUT -j IPTVINPUT
 195         iptables -N IPTVFORWARD
 196         iptables -A FORWARD -j IPTVFORWARD
 197
 198         # Allow to ping the firewall.
 199         iptables -N ICMPINPUT
 200         iptables -A INPUT -j ICMPINPUT
 201         iptables -A ICMPINPUT -p icmp --icmp-type 8 -j ACCEPT
 202
 203         # Accept everything on loopback if source/destination is loopback space...
 204         iptables -N LOOPBACK
 205         iptables -A LOOPBACK -i lo -s 127.0.0.0/8 -j ACCEPT
 206         iptables -A LOOPBACK -o lo -d 127.0.0.0/8 -j ACCEPT
 207
 208         # ... and drop everything else on the loopback interface, since no other traffic should appear there
 209         iptables -A LOOPBACK -i lo -j SPOOFED_MARTIAN
 210         iptables -A LOOPBACK -o lo -j SPOOFED_MARTIAN
 211
 212         # Filter all packets with loopback addresses on non-loopback interfaces (spoofed)
 213         iptables -A LOOPBACK -s 127.0.0.0/8 -j SPOOFED_MARTIAN
 214         iptables -A LOOPBACK -d 127.0.0.0/8 -j SPOOFED_MARTIAN
 215
 216         for i in INPUT FORWARD OUTPUT; do
 217                 iptables -A ${i} -j LOOPBACK
 218         done
 219
 220         # Captive portal
 221         iptables -N CAPTIVE_PORTAL
 222         iptables -N CAPTIVE_PORTAL_CLIENTS
 223         for i in INPUT FORWARD; do
 224                 iptables -A ${i} -j CAPTIVE_PORTAL
 225         done
 226
 227         # Accept everything connected
 228         for i in INPUT FORWARD OUTPUT; do
 229                 iptables -A ${i} -j CONNTRACK
 230         done
 231
 232         # Allow DHCP
 233         iptables -N DHCPINPUT
 234         iptables -A DHCPINPUT -p udp --sport 68 --dport 67 -j ACCEPT
 235         iptables -A DHCPINPUT -p tcp --sport 68 --dport 67 -j ACCEPT
 236
 237         iptables -N DHCPOUTPUT
 238         iptables -A DHCPOUTPUT -p udp --sport 67 --dport 68 -j ACCEPT
 239         iptables -A DHCPOUTPUT -p tcp --sport 67 --dport 68 -j ACCEPT
 240
 241         # Allow DHCP on GREEN
 242         iptables -N DHCPGREENINPUT
 243         iptables -N DHCPGREENOUTPUT
 244         if [ -n "${GREEN_DEV}" ]; then
 245                 iptables -A INPUT  -i "${GREEN_DEV}" -j DHCPGREENINPUT
 246                 iptables -A OUTPUT -o "${GREEN_DEV}" -j DHCPGREENOUTPUT
 247         fi
 248
 249         # Allow DHCP on BLUE to be turned on/off
 250         iptables -N DHCPBLUEINPUT
 251         iptables -N DHCPBLUEOUTPUT
 252         if [ -n "${BLUE_DEV}" ]; then
 253                 iptables -A INPUT  -i "${BLUE_DEV}" -j DHCPBLUEINPUT
 254                 iptables -A OUTPUT -o "${BLUE_DEV}" -j DHCPBLUEOUTPUT
 255         fi
 256
 257         # Tor (inbound)
 258         iptables -N TOR_INPUT
 259         iptables -A INPUT -j TOR_INPUT
 260
 261         # Location Block
 262         iptables -N LOCATIONBLOCK
 263         iptables -A INPUT -j LOCATIONBLOCK
 264         iptables -A FORWARD -j LOCATIONBLOCK
 265
 266         # trafic from ipsecX/TUN/TAP interfaces, before "-i GREEN_DEV" accept everything
 267         iptables -N IPSECINPUT
 268         iptables -N IPSECFORWARD
 269         iptables -N IPSECOUTPUT
 270         iptables -A INPUT -j IPSECINPUT
 271         iptables -A FORWARD -j IPSECFORWARD
 272         iptables -A OUTPUT -j IPSECOUTPUT
 273         iptables -t nat -N IPSECNAT
 274         iptables -t nat -A POSTROUTING -j IPSECNAT
 275
 276         # localhost and ethernet.
 277         # Always allow accessing the web GUI from GREEN.
 278         iptables -N GUIINPUT
 279         iptables -A INPUT -j GUIINPUT
 280         if [ -n "${GREEN_DEV}" ]; then
 281                 iptables -A GUIINPUT -i "${GREEN_DEV}" -p tcp --dport 444 -j ACCEPT
 282         fi
 283
 284         # WIRELESS chains
 285         iptables -N WIRELESSINPUT
 286         iptables -A INPUT -m conntrack --ctstate NEW -j WIRELESSINPUT
 287         iptables -N WIRELESSFORWARD
 288         iptables -A FORWARD -m conntrack --ctstate NEW -j WIRELESSFORWARD
 289
 290         # OpenVPN
 291         iptables -N OVPNINPUT
 292         iptables -A INPUT -j OVPNINPUT
 293
 294         # Tor (outbound)
 295         iptables -N TOR_OUTPUT
 296         iptables -A OUTPUT -j TOR_OUTPUT
 297
 298         # Jump into the actual firewall ruleset.
 299         iptables -N INPUTFW
 300         iptables -A INPUT -j INPUTFW
 301
 302         iptables -N OUTGOINGFW
 303         iptables -A OUTPUT -j OUTGOINGFW
 304
 305         iptables -N FORWARDFW
 306         iptables -A FORWARD -j FORWARDFW
 307
 308         # SNAT rules
 309         iptables -t nat -N NAT_SOURCE
 310         iptables -t nat -A POSTROUTING -j NAT_SOURCE
 311
 312         # Captive Portal
 313         iptables -t nat -N CAPTIVE_PORTAL
 314         iptables -t nat -A PREROUTING -j CAPTIVE_PORTAL
 315
 316         # Custom prerouting chains (for transparent proxy)
 317         iptables -t nat -N SQUID
 318         iptables -t nat -A PREROUTING -j SQUID
 319
 320         # DNAT rules
 321         iptables -t nat -N NAT_DESTINATION
 322         iptables -t nat -A PREROUTING -j NAT_DESTINATION
 323         iptables -t nat -A OUTPUT -j NAT_DESTINATION
 324
 325         iptables -t mangle -N NAT_DESTINATION
 326         iptables -t mangle -A PREROUTING -j NAT_DESTINATION
 327
 328         iptables -t nat -N NAT_DESTINATION_FIX
 329         iptables -t nat -A POSTROUTING -j NAT_DESTINATION_FIX
 330
 331         if [ -n "${GREEN_ADDRESS}" ]; then
 332                 iptables -t nat -A NAT_DESTINATION_FIX \
 333                         -m mark --mark "0x01000000/${NAT_MASK}" -j SNAT --to-source "${GREEN_ADDRESS}"
 334         fi
 335
 336         if [ -n "${BLUE_ADDRESS}" ]; then
 337                 iptables -t nat -A NAT_DESTINATION_FIX \
 338                         -m mark --mark "0x02000000/${NAT_MASK}" -j SNAT --to-source "${BLUE_ADDRESS}"
 339         fi
 340
 341         if [ -n "${ORANGE_ADDRESS}" ]; then
 342                 iptables -t nat -A NAT_DESTINATION_FIX \
 343                         -m mark --mark "0x04000000/${NAT_MASK}" -j SNAT --to-source "${ORANGE_ADDRESS}"
 344         fi
 345
 346         # RED chain, used for the red interface
 347         iptables -N REDINPUT
 348         iptables -A INPUT -j REDINPUT
 349         iptables -N REDFORWARD
 350         iptables -A FORWARD -j REDFORWARD
 351         iptables -t nat -N REDNAT
 352         iptables -t nat -A POSTROUTING -j REDNAT
 353
 354         # Populate IPsec chains
 355         /usr/lib/firewall/ipsec-policy
 356
 357         # Apply OpenVPN firewall rules
 358         /usr/local/bin/openvpnctrl --firewall-rules
 359
 360         # run wirelessctrl
 361         /usr/local/bin/wirelessctrl
 362
 363         # run captivectrl
 364         /usr/local/bin/captivectrl
 365
 366         # POLICY CHAIN
 367         iptables -N POLICYIN
 368         iptables -A INPUT -j POLICYIN
 369         iptables -N POLICYFWD
 370         iptables -A FORWARD -j POLICYFWD
 371         iptables -N POLICYOUT
 372         iptables -A OUTPUT -j POLICYOUT
 373
 374         # Initialize firewall policies.
 375         /usr/sbin/firewall-policy
 376
 377         # Install firewall rules for the red interface.
 378         iptables_red_up
 379
 380         # If red has not been brought up yet, we will
 381         # add the blocking rules for MASQUERADE
 382         if [ ! -e "/var/ipfire/red/active" ]; then
 383                 iptables_red_down
 384         fi
 385 }
 386
 387 iptables_red_up() {
 388         iptables -F REDINPUT
 389         iptables -F REDFORWARD
 390         iptables -t nat -F REDNAT
 391
 392         # Prohibit spoofing our own IP address on RED
 393         if [ -f /var/ipfire/red/active ]; then
 394                 REDIP="$( cat /var/ipfire/red/local-ipaddress )";
 395
 396                 if [ "$IFACE" != "" ]; then
 397                         iptables -A REDINPUT -s $REDIP -i $IFACE -j SPOOFED_MARTIAN
 398                 elif [ "$DEVICE" != "" ]; then
 399                         iptables -A REDINPUT -s $REDIP -i $DEVICE -j SPOOFED_MARTIAN
 400                 fi
 401         fi
 402
 403         # PPPoE / PPTP Device
 404         if [ "$IFACE" != "" ]; then
 405                 # PPPoE / PPTP
 406                 if [ "$DEVICE" != "" ]; then
 407                         iptables -A REDINPUT -i $DEVICE -j ACCEPT
 408                 fi
 409                 if [ "$RED_TYPE" == "PPTP" -o "$RED_TYPE" == "PPPOE" ]; then
 410                         if [ "$RED_DEV" != "" ]; then
 411                                 iptables -A REDINPUT -i $RED_DEV -j ACCEPT
 412                         fi
 413                 fi
 414         fi
 415
 416         # PPTP over DHCP
 417         if [ "$DEVICE" != "" -a "$TYPE" == "PPTP" -a "$METHOD" == "DHCP" ]; then
 418                 iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
 419                 iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $DEVICE -j ACCEPT
 420         fi
 421
 422         if [ "$IFACE" != "" -a -f /var/ipfire/red/active ]; then
 423                 # DHCP
 424                 if [ "$RED_DEV" != "" -a "$RED_TYPE" == "DHCP" ]; then
 425                         iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
 426                         iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
 427                 fi
 428                 if [ "$METHOD" == "DHCP"  -a "$PROTOCOL" == "RFC1483" ]; then
 429                         iptables -A REDINPUT -p tcp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
 430                         iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
 431                 fi
 432
 433                 # Outgoing masquerading (don't masqerade IPsec)
 434                 iptables -t nat -A REDNAT -m policy --pol ipsec --dir=out -o "${IFACE}" -j RETURN
 435
 436                 if [ "${IFACE}" = "${GREEN_DEV}" ]; then
 437                         iptables -t nat -A REDNAT -i "${GREEN_DEV}" -o "${IFACE}" -j RETURN
 438                 fi
 439
 440                 local NO_MASQ_NETWORKS
 441
 442                 if [ "${MASQUERADE_GREEN}" = "off" ]; then
 443                         NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${GREEN_NETADDRESS}/${GREEN_NETMASK}"
 444                 fi
 445
 446                 if [ "${MASQUERADE_BLUE}" = "off" ]; then
 447                         NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${BLUE_NETADDRESS}/${BLUE_NETMASK}"
 448                 fi
 449
 450                 if [ "${MASQUERADE_ORANGE}" = "off" ]; then
 451                         NO_MASQ_NETWORKS="${NO_MASQ_NETWORKS} ${ORANGE_NETADDRESS}/${ORANGE_NETMASK}"
 452                 fi
 453
 454                 local network
 455                 for network in ${NO_MASQ_NETWORKS}; do
 456                         iptables -t nat -A REDNAT -s "${network}" -o "${IFACE}" -j RETURN
 457                 done
 458
 459                 # Masquerade everything else
 460                 iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
 461         fi
 462
 463         # Reload all rules.
 464         /usr/local/bin/firewallctrl
 465 }
 466
 467 iptables_red_down() {
 468         # Prohibit packets to reach the masquerading rule
 469         # while the WAN interface is down - this is required to
 470         # circumvent udp related NAT issues
 471         # http://forum.ipfire.org/index.php?topic=11127.0
 472         if [ -n "${IFACE}" ]; then
 473                 iptables -F REDFORWARD
 474                 iptables -A REDFORWARD -o "${IFACE}" -j DROP
 475         fi
 476
 477         # Reload all rules.
 478         /usr/local/bin/firewallctrl
 479 }
 480
 481 # See how we were called.
 482 case "$1" in
 483   start)
 484         boot_mesg "Setting up firewall"
 485         iptables_init
 486         evaluate_retval
 487         ;;
 488   reload|up)
 489         boot_mesg "Reloading firewall"
 490         iptables_red_up
 491         evaluate_retval
 492         ;;
 493   down)
 494         boot_mesg "Disabling firewall access to RED"
 495         iptables_red_down
 496         evaluate_retval
 497         ;;
 498   restart)
 499         $0 start
 500         ;;
 501   *)
 502         echo "Usage: $0 {start|reload|restart}"
 503         exit 1
 504         ;;
 505 esac
 506
 507 exit 0