IPv6 ICMP criticals
parent
192040ebf2
commit
4b89a59d71
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@ -18,7 +18,7 @@
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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FW_VERSION="0.9.11"
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FW_VERSION="0.9.12"
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# These option is here to help pre-1.0 users easily upgrade, defines critical defaults
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# that would otherwise require remaking their options file. I leave this on by default,
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@ -801,11 +801,28 @@ if [ "$IPV6_BLOCKEDIP" ]; then
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done
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fi
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if [ "$IPV6_ICMP_CRITICAL" ]; then
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# This is necessary to make sure that PMTU works
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$IP6TABLES -A OUTPUT -p icmpv6 --icmpv6-type time-exceeded \
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-j ACCEPT
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$IP6TABLES -A INPUT -p icmpv6 --icmpv6-type time-exceeded \
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-j ACCEPT
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$IP6TABLES -A OUTPUT -p icmpv6 --icmpv6-type packet-too-big \
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-j ACCEPT
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$IP6TABLES -A INPUT -p icmpv6 --icmpv6-type packet-too-big \
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-j ACCEPT
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if [ "$IPV6_FORWARDRANGE" ]; then
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$IP6TABLES -A FORWARD -p icmpv6 --icmpv6-type time-exceeded -j ACCEPT
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$IP6TABLES -A FORWARD -p icmpv6 --icmpv6-type packet-too-big -j ACCEPT
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fi
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fi
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if [ -s "$BASEDIR/include/ipv6_custom_mssclamp" ]; then
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display_c YELLOW "Loading custom IPv6 MSS Clamp rules..."
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. "$BASEDIR/include/ipv6_custom_mssclamp"
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fi
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if [ "$IPV6_CLAMPMSS" ]; then
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display_c YELLOW "Clamping IPV6 MSS to PMTU..."
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for i in $IPV6_CLAMPMSS; do
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@ -815,15 +832,6 @@ fi
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$IP6TABLES -A OUTPUT -p tcp --tcp-flags SYN,RST SYN \
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-j TCPMSS --clamp-mss-to-pmtu -o $i -m tcpmss \
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--mss 1280:1536
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# This is necessary to make sure that PMTU works
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$IP6TABLES -A OUTPUT -p icmpv6 --icmpv6-type time-exceeded \
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-o $i -j ACCEPT
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$IP6TABLES -A INPUT -p icmpv6 --icmpv6-type time-exceeded \
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-i $i -j ACCEPT
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$IP6TABLES -A OUTPUT -p icmpv6 --icmpv6-type packet-too-big \
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-o $i -j ACCEPT
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$IP6TABLES -A INPUT -p icmpv6 --icmpv6-type packet-too-big \
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-i $i -j ACCEPT
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done
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fi
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@ -71,3 +71,6 @@ EXTIP="auto"
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EXTIF="eth0"
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EXTIF_FIND="$BASEDIR/bin/get_default_if"
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EXTIP_FIND="$BASEDIR/bin/get_default_ip"
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# By default, we allow ipv6 critical icmp
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IPV6_ICMP_CRITICAL=1
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@ -213,3 +213,8 @@ BLOCKEDIP=$BASEDIR/conf/ipv4-blocked
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# IPv6 range to forward
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#IPV6_FORWARDRANGE=""
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# Allow critical ICMP messages to go through, such as packet too big.
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# You should _really_ make sure you don't disable this if you have any
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# kind of MTU changes inside or outside your network.
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IPV6_ICMP_CRITICAL=1
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