diff options
Diffstat (limited to 'roles/common/files/usr/local/sbin/update-firewall.sh')
| -rwxr-xr-x | roles/common/files/usr/local/sbin/update-firewall.sh | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/roles/common/files/usr/local/sbin/update-firewall.sh b/roles/common/files/usr/local/sbin/update-firewall.sh index b27e5ce..994df14 100755 --- a/roles/common/files/usr/local/sbin/update-firewall.sh +++ b/roles/common/files/usr/local/sbin/update-firewall.sh @@ -210,43 +210,42 @@ run() { # DROP all RFC1918 addresses, martian networks, multicasts, ... # Credits to http://newartisans.com/2007/09/neat-tricks-with-iptables/ # http://baldric.net/loose-iptables-firewall-for-servers/ local ip if [ "$f" = 4 -a "$ipsec" = y ]; then # Private-use networks (RFC 1918) and link local (RFC 3927) local MyIPsec="$( /bin/ip -4 -o route show table 220 dev $if | sed 's/\s.*//' )" local MyNetwork="$( /bin/ip -4 -o address show dev $if scope global \ | sed -nr "s/^[0-9]+:\s+$if\s+inet\s(\S+).*/\1/p" \ | while read ip; do for ips in $MyIPsec; do [ "$ips" = "$(/usr/bin/netmask -nc "$ip" "$ips" | sed 's/^ *//')" ] || echo "$ip" done done )" [ "$MyNetwork" ] && \ for ip in 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 169.254.0.0/16; do # Don't lock us out if we are behind a NAT ;-) for myip in $MyNetwork; do - [ "$ip" = "$(/usr/bin/netmask -nc "$ip" "$myip" | sed 's/^ *//')" ] \ - || iptables -A INPUT -i $if -s "$ip" -j DROP - done + [ "$ip" = "$(/usr/bin/netmask -nc "$ip" "$myip" | sed 's/^ *//')" ] || echo "$ip" + done | uniq | while read ip; do iptables -A INPUT -i $if -s "$ip" -j DROP; done done # Other martian packets: "This" network, multicast, broadcast (RFCs # 1122, 3171 and 919). for ip in 0.0.0.0/8 224.0.0.0/4 240.0.0.0/4 255.255.255.255/32; do iptables -A INPUT -i $if -s "$ip" -j DROP iptables -A INPUT -i $if -d "$ip" -j DROP done elif [ "$f" = 6 ]; then # Martian IPv6 packets: ULA (RFC 4193) and site local addresses # (RFC 3879). for ip in fc00::/7 fec0::/10; do iptables -A INPUT -i $if -s "$ip" -j DROP iptables -A INPUT -i $if -d "$ip" -j DROP done fi # DROP INVALID packets immediately. iptables -A INPUT -m state --state INVALID -j DROP @@ -326,57 +325,57 @@ run() { esac iptables $iptNew $if -p $proto $optsNew -m state --state $stNew -j ACCEPT iptables $iptEst $if -p $proto $optsEst -m state --state $stEst -j ACCEPT done ######################################################################## commit local rv1=0 rv2=0 persistent=/etc/iptables/rules.v$f local oldz=$(mktemp --tmpdir current-rules.v$f.XXXXXX) # Reset the counters. They are not useful for comparing and/or # storing persistent ruleset. (We don't use sed -i because we want # to restore the counters when reverting.) sed -r -e '/^:/ s/\[[0-9]+:[0-9]+\]$/[0:0]/' \ -e 's/^\[[0-9]+:[0-9]+\]\s+//' \ "$old" > "$oldz" - /usr/bin/uniq "$new" | /bin/ip netns exec $netns $ipt-restore || ipt-revert + /bin/ip netns exec $netns $ipt-restore <"$new" || ipt-revert for table in ${tables[$f]}; do /bin/ip netns exec $netns $ipt-save -t $table done > "$new" ipt-diff "$oldz" "$new" || rv1=$? if ! [ -f "$persistent" -a -x /etc/network/if-pre-up.d/iptables ]; then rv2=1 else ipt-trim < "$oldz" | ipt-diff - "$persistent" || rv2=$? fi local update="Please run '${0##*/}'." if [ $check -eq 0 ]; then - /usr/bin/uniq "$new" | $ipt-restore || ipt-revert + $ipt-restore <"$new" || ipt-revert else if [ $rv1 -ne 0 ]; then log "WARN: The IPv$f firewall is not up to date! $update" fi if [ $rv2 -ne 0 ]; then log "WARN: The current IPv$f firewall is not persistent! $update" fi fi rm -f "$oldz" "$new" return $(( $rv1 | $rv2 )) } # Parse options while [ $# -gt 0 ]; do case "$1" in -?*) for (( k=1; k<${#1}; k++ )); do o="${1:$k:1}" case "$o" in |