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remove 16 rules and replace by 2 by using a table

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I've been doing this ever since there were tables
coudl make more efficient by using "in recv"  and "out xmit" instead of via
but I'll leave that.

MFC after:	1 week
This commit is contained in:
Julian Elischer 2015-06-22 04:25:41 +00:00
parent 3f745144d9
commit ef52ea2155
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=284691
1 changed files with 14 additions and 22 deletions
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36
etc/rc.firewall
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@ -266,6 +266,7 @@ case ${firewall_type} in
# firewall_simple_oif_ipv6: Outside IPv6 network interface.
# firewall_simple_onet_ipv6: Outside IPv6 network prefix.
############
BAD_ADDR_TBL=13
# set these to your outside interface network
oif="$firewall_simple_oif"
@ -290,19 +291,23 @@ case ${firewall_type} in
fi
fi
# define stuff we should never send out or receive in
# Stop RFC1918 nets on the outside interface
${fwcmd} add deny all from any to 10.0.0.0/8 via ${oif}
${fwcmd} add deny all from any to 172.16.0.0/12 via ${oif}
${fwcmd} add deny all from any to 192.168.0.0/16 via ${oif}
${fwcmd} table ${BAD_ADDR_TBL} flush
${fwcmd} table ${BAD_ADDR_TBL} add 10.0.0.0/8
${fwcmd} table ${BAD_ADDR_TBL} add 172.16.0.0/12
${fwcmd} table ${BAD_ADDR_TBL} add 192.168.0.0/16
# Stop draft-manning-dsua-03.txt (1 May 2000) nets (includes RESERVED-1,
# DHCP auto-configuration, NET-TEST, MULTICAST (class D), and class E)
# on the outside interface
${fwcmd} add deny all from any to 0.0.0.0/8 via ${oif}
${fwcmd} add deny all from any to 169.254.0.0/16 via ${oif}
${fwcmd} add deny all from any to 192.0.2.0/24 via ${oif}
${fwcmd} add deny all from any to 224.0.0.0/4 via ${oif}
${fwcmd} add deny all from any to 240.0.0.0/4 via ${oif}
${fwcmd} table ${BAD_ADDR_TBL} add 0.0.0.0/8
${fwcmd} table ${BAD_ADDR_TBL} add 169.254.0.0/16
${fwcmd} table ${BAD_ADDR_TBL} add 192.0.2.0/24
${fwcmd} table ${BAD_ADDR_TBL} add 224.0.0.0/4
${fwcmd} table ${BAD_ADDR_TBL} add 240.0.0.0/4
${fwcmd} add deny all from any to "table($BAD_ADDR_TBL)" via ${oif}
# Network Address Translation. This rule is placed here deliberately
# so that it does not interfere with the surrounding address-checking
@ -319,20 +324,7 @@ case ${firewall_type} in
;;
esac
# Stop RFC1918 nets on the outside interface
${fwcmd} add deny all from 10.0.0.0/8 to any via ${oif}
${fwcmd} add deny all from 172.16.0.0/12 to any via ${oif}
${fwcmd} add deny all from 192.168.0.0/16 to any via ${oif}
# Stop draft-manning-dsua-03.txt (1 May 2000) nets (includes RESERVED-1,
# DHCP auto-configuration, NET-TEST, MULTICAST (class D), and class E)
# on the outside interface
${fwcmd} add deny all from 0.0.0.0/8 to any via ${oif}
${fwcmd} add deny all from 169.254.0.0/16 to any via ${oif}
${fwcmd} add deny all from 192.0.2.0/24 to any via ${oif}
${fwcmd} add deny all from 224.0.0.0/4 to any via ${oif}
${fwcmd} add deny all from 240.0.0.0/4 to any via ${oif}
${fwcmd} add deny all from "table($BAD_ADDR_TBL)" to any via ${oif}
if [ -n "$inet6" ]; then
# Stop unique local unicast address on the outside interface
${fwcmd} add deny all from fc00::/7 to any via ${oif6}