forked from extern/shorewall_code
NONE Policy; Allow Intrazone connections; no bounce rules
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@510 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
This commit is contained in:
teastep
parent
fbca287dab
commit
5be79ecde7
@ -1,66 +1,7 @@
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Changes since 1.3.14
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Changes since 1.4.0
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1. All versions changed to 1.4.
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1. Implement NONE policy.
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2. Rework of error message generation to make the 'firewall' script
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smaller.
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2. Never create rules for <iface>:<subnet> to itself.
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3. Deimplemented MERGE_HOSTS=No.
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4. Generate error for <dev>:<integer> name in interfaces file.
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5. Deimplement old ping handling.
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6. Deimplement 'routestopped' interface/hosts option.
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7. Strip comments from potentially large files while the firewall is
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still up and running during 'restart'.
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8. Disallow the old port forwarding/redirection syntax.
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9. Reorganize shorewall.conf.
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10. Added support for LOG target.
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11. Move firewall and version (one more time....)
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12. Add late DNS reply rule to the common chain.
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12. Corrected rule number calculation problem in 'shorewall add' command
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processing.
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13. Update Documentation for 1.4
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14. Remove icmp.def file.
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15. Added CONTINUE rule target.
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16. Added Andrew Zhoglo's fix for logunclean.
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17. Removed 'multi' option.
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18. Support 802.11b devices with maclist.
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19. Don't detect loopback simply by name.
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20. Removed trailing white space from all files.
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21. Improved parsing of comma-separated lists.
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22. Add ECN Removal support
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23. Add TCP ports 445 and 139 to the common silent list.
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24. Remove 'check' command support.
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25. Restore 'check' command support.
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26. Remove unused function find_interface_broadcasts()
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27. Remove stale comments in the params file.
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28. Silently drop INVALID state packets
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29. Ignore the 'default' route when detecting masq'd networks.
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30. REALLY process the params file first now (honest).
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3. Always allow intrazone traffic.
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@ -672,6 +672,7 @@ validate_policy()
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print_policy() # $1 = source zone, $2 = destination zone
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{
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[ $command != check ] || \
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[ $1 = $2 ] || \
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[ $1 = all ] || \
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[ $2 = all ] || \
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echo " Policy for $1 to $2 is $policy"
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@ -708,7 +709,7 @@ validate_policy()
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esac
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case $policy in
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ACCEPT|REJECT|DROP|CONTINUE)
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ACCEPT|REJECT|DROP|CONTINUE|NONE)
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;;
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*)
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startup_error "Invalid policy $policy"
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@ -717,8 +718,8 @@ validate_policy()
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chain=${client}2${server}
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[ "x$chain" = "x${FW}2${FW}" ] && \
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startup_error "fw->fw policy not allowed: $policy"
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[ "$client" != "$server" ] || [ -n "$serverwild" ] || \
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startup_error "Intra-zone policies not allowed: $client $server $policy"
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if is_policy_chain $chain ; then
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startup_error "Duplicate policy $policy"
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@ -728,7 +729,7 @@ validate_policy()
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chain=${client}2${server}
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all_policy_chains="$all_policy_chains $chain"
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[ $policy = NONE ] || all_policy_chains="$all_policy_chains $chain"
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eval ${chain}_is_policy=Yes
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eval ${chain}_policy=$policy
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@ -743,6 +744,7 @@ validate_policy()
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if [ -z "$pc" ]; then
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eval ${zone}2${zone1}_policychain=$chain
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eval ${zone}2${zone1}_policy=$policy
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print_policy $zone $zone1
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fi
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done
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@ -753,6 +755,7 @@ validate_policy()
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if [ -z "$pc" ]; then
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eval ${zone}2${server}_policychain=$chain
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eval ${zone}2${server}_policy=$policy
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print_policy $zone $server
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fi
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done
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@ -763,6 +766,7 @@ validate_policy()
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if [ -z "$pc" ]; then
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eval ${client}2${zone}_policychain=$chain
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eval ${client}2${zone}_policy=$policy
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print_policy $client $zone
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fi
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done
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@ -2151,7 +2155,7 @@ process_rule() # $1 = target
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else
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serverport=
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[ -z "$serverzone" -o -z "$servers" ] && \
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startup_error "Empty destination zone or qualifier: rule \"$rule\""
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fatal_error "Empty destination zone or qualifier: rule \"$rule\""
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fi
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fi
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@ -2165,6 +2169,11 @@ process_rule() # $1 = target
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chain=${source}2${dest}
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eval policy=${chain}_policy
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[ $policy = NONE ] && \
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fatal_error "Rules may not override a NONE policy: rule \"$rule\""
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[ $command = check ] || ensurechain $chain
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if [ "x$chain" = x${FW}2${FW} ]; then
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@ -2176,6 +2185,8 @@ process_rule() # $1 = target
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return
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;;
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esac
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elif [ "$source" = "$dest" ]; then
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fatal_error "Intra-zone rules are not allowed: rule \"$rule\""
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else
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[ $command = check ] || ensurechain $chain
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fi
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@ -3670,41 +3681,34 @@ activate_rules()
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done
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for zone1 in $zones; do
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eval policy=\$${zone}2${zone1}_policy
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[ "$policy" = NONE ] && continue
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eval dest_hosts=\$${zone1}_hosts
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chain="`rules_chain $zone $zone1`"
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if [ $zone = $zone1 ]; then
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chain=${zone}2${zone}
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havechain $chain || chain=ACCEPT
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else
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chain="`rules_chain $zone $zone1`"
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fi
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eval policy_chain=
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echo "$zone $zone1 $chain" >> ${STATEDIR}/chains
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if havechain ${zone}2${zone1} || havechain ${zone1}2${zone}; then
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have_canonical=Yes
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else
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have_canonical=
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fi
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for host in $source_hosts; do
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interface=${host%:*}
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subnet=${host#*:}
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chain1=`forward_chain $interface`
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if [ -n "$have_canonical" ]; then
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bounce=yes
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else
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case $interface in
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*+*)
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bounce=yes
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;;
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*)
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bounce=
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;;
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esac
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fi
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for host1 in $dest_hosts; do
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interface1=${host1%:*}
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subnet1=${host1#*:}
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if [ $interface != $interface1 -o -n "$bounce" ]; then
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if [ "$host" != "$host1" ]; then
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run_iptables -A $chain1 -s $subnet -o $interface1 -d $subnet1 -j $chain
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fi
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done
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@ -1,10 +1,17 @@
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#
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# Shorewall 1.4 - /etc/shorewall/hosts
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#
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# WARNING: 90% of Shorewall users don't need to add entries to this
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# file and 80% of those who try to add such entries get it
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# wrong. Unless you are ABSOLUTELY SURE that you need entries
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# in this file, don't touch it!
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# THERE ARE TWO CASES WHERE YOU NEED THIS FILE:
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#
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# 1) YOU HAVE MULTIPLE NETWORKS IN THE SAME ZONE CONNECTED TO
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# A SINGLE INTERFACE AND YOU WANT THE SHOREWALL BOX TO ROUTE
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# BETWEEN THESE NETWORKS.
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#
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# 2) YOU HAVE MORE THAN ONE ZONE CONNECTED THROUGH A SINGLE
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# INTERFACE.
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#
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# IF YOU DON'T HAVE EITHER OF THESE SITUATIONS THEN DON'T TOUCH
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# THIS FILE.
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#
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# This file is used to define zones in terms of subnets and/or
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# individual IP addresses. Most simple setups don't need to
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@ -1,94 +1,19 @@
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This is a major release of Shorewall.
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This is a minor release of Shorewall.
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Function from 1.3 that has been omitted from this version includes:
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This release introduces incompatibilities with prior releases. See
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http://www.shorewall.net/upgrade_issues.htm.
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1) The MERGE_HOSTS variable in shorewall.conf is no longer
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supported. Shorewall 1.4 behavior is the same as 1.3 with
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MERGE_HOSTS=Yes.
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Changes are:
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2) Interface names of the form <device>:<integer> in
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/etc/shorewall/interfaces now generate an error.
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a) There is now a new NONE policy specifiable in
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/etc/shorewall/policy. This policy will cause Shorewall to assume that
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there will never be any traffic between the source and destination
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zones.
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3) Shorewall 1.4 implements behavior consistent with
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OLD_PING_HANDLING=No. OLD_PING_HANDLING=Yes will generate an error
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at startup as will specification of the 'noping' or 'filterping'
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interface options.
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4) The 'routestopped' option in the /etc/shorewall/interfaces and
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/etc/shorewall/hosts files is no longer supported and will generate
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an error at startup if specified.
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5) The Shorewall 1.2 syntax for DNAT and REDIRECT rules is no longer
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accepted.
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6) The ALLOWRELATED variable in shorewall.conf is no longer
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supported. Shorewall 1.4 behavior is the same as 1.3 with
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ALLOWRELATED=Yes.
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7) The 'multi' interface option is no longer supported. Shorewall will
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generate rules for sending packets back out the same interface
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that they arrived on in two cases:
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a) There is an _explicit_ policy for the source zone to the
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destination zone. An explicit policy names both zones and does not
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use the 'all' reserved word.
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b) There are one or more rules for traffic for the source zone to
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or from the destination zone including rules that use the 'all'
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reserved word. Exception: If the source and the destination are
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the same zone then the rule must be explicit - it must name the zone
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in both the SOURCE and DESTINATION columns.
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Changes for 1.4 include:
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1) shorewall.conf has been completely reorganized into logical
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sections.
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2) LOG is now a valid action for a rule (/etc/shorewall/rules).
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3) The firewall script and version file are now installed in
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/usr/share/shorewall.
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4. Late arriving DNS replies are now silently dropped in the common
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chain by default.
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5) In addition to behaving like OLD_PING_HANDLING=No, Shorewall 1.4 no
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longer unconditionally accepts outbound ICMP packets. So if you want
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to 'ping' from the firewall, you will need the appropriate rule or
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policy.
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6) CONTINUE is now a valid action for a rule (/etc/shorewall/rules).
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7) 802.11b devices with names of the form wlan<n> now support the
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'maclist' option.
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8) IMPORTANT: Shorewall now REQUIRES the iproute package ('ip'
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utility).
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9) Explicit Congestion Notification (ECN - RFC 3168) may now be turned
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off on a host or network basis using the new /etc/shorewall/ecn
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file. To use this facility:
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a) You must be running kernel 2.4.20
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b) You must have applied the patch in
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http://www.shorewall/net/pub/shorewall/ecn/patch.
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c) You must have iptables 1.2.7a installed.
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10) The /etc/shorewall/params file is now processed first so that
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variables may be used in the /etc/shorewall/shorewall.conf file.
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11) Packets with state INVALID are now silently dropped.
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12) Shorewall now gives a more helpful diagnostic when the 'ipchains'
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compatibility kernel module is loaded and a 'shorewall start'
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command is issued.
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13) The SHARED_DIR variable has been removed from shorewall.conf. This
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variable was for use by package maintainers and was not documented
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for general use.
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14) Shorewall now ignores 'default' routes when detecting masq'd
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networks.
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b) Shorewall no longer creates rules to govern traffic from an
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interface:subnet to itself.
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c) Intra-zone traffic is always accepted now (exception is (b)
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above).. Intrazone policies and rules are no longer allowed.
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