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Update this with the additional nets recomended by reading

Browse Source 
draft-manning-dsua-01.txt.

Stop using public addresses as samples and use the recommended
192.0.2.0/24 netblock that has specifically been set aside for
documentation purposes.

Reviewed by:	readers of freebsd-security did not respond to a request
                for review
This commit is contained in:
Rodney W. Grimes 2000-01-28 11:30:28 +00:00
parent 9e4be63dd6
commit 9b20e2ca56
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=56736
1 changed files with 26 additions and 14 deletions
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40
etc/rc.firewall
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@ -110,9 +110,9 @@ case ${firewall_type} in
############
# set these to your network and netmask and ip
net="192.168.4.0"
net="192.0.2.0"
mask="255.255.255.0"
ip="192.168.4.17"
ip="192.0.2.1"
# Allow any traffic to or from my own net.
${fwcmd} add pass all from ${ip} to ${net}:${mask}
@ -155,27 +155,39 @@ case ${firewall_type} in
# set these to your outside interface network and netmask and ip
oif="ed0"
onet="192.168.4.0"
omask="255.255.255.0"
oip="192.168.4.17"
onet="192.0.2.0"
omask="255.255.255.240"
oip="192.0.2.1"
# set these to your inside interface network and netmask and ip
iif="ed1"
inet="192.168.3.0"
imask="255.255.255.0"
iip="192.168.3.17"
inet="192.0.2.16"
imask="255.255.255.240"
iip="192.0.2.17"
# Stop spoofing
${fwcmd} add deny all from ${inet}:${imask} to any in via ${oif}
${fwcmd} add deny all from ${onet}:${omask} to any in via ${iif}
# Stop RFC1918 nets on the outside interface
${fwcmd} add deny all from 192.168.0.0:255.255.0.0 to any via ${oif}
${fwcmd} add deny all from any to 192.168.0.0:255.255.0.0 via ${oif}
${fwcmd} add deny all from 172.16.0.0:255.240.0.0 to any via ${oif}
${fwcmd} add deny all from any to 172.16.0.0:255.240.0.0 via ${oif}
${fwcmd} add deny all from 10.0.0.0:255.0.0.0 to any via ${oif}
${fwcmd} add deny all from any to 10.0.0.0:255.0.0.0 via ${oif}
${fwcmd} add deny all from 10.0.0.0/8 to any via ${oif}
${fwcmd} add deny all from any to 10.0.0.0/8 via ${oif}
${fwcmd} add deny all from 172.16.0.0/12 to any via ${oif}
${fwcmd} add deny all from any to 172.16.0.0/12 via ${oif}
${fwcmd} add deny all from 192.168.0.0/16 to any via ${oif}
${fwcmd} add deny all from any to 192.168.0.0/16 via ${oif}
# Stop draft-manning-dsua-01.txt nets on the outside interface
${fwcmd} add deny all from 0.0.0.0/8 to any via ${oif}
${fwcmd} add deny all from any to 0.0.0.0/8 via ${oif}
${fwcmd} add deny all from 169.254.0.0/16 to any via ${oif}
${fwcmd} add deny all from any to 169.254.0.0/16 via ${oif}
${fwcmd} add deny all from 192.0.2.0/24 to any via ${oif}
${fwcmd} add deny all from any to 192.0.2.0/24 via ${oif}
${fwcmd} add deny all from 224.0.0.0/4 to any via ${oif}
${fwcmd} add deny all from any to 224.0.0.0/4 via ${oif}
${fwcmd} add deny all from 240.0.0.0/4 to any via ${oif}
${fwcmd} add deny all from any to 240.0.0.0/4 via ${oif}
# Allow TCP through if setup succeeded
${fwcmd} add pass tcp from any to any established