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jem.m4: Remove SMB for untrusted hosts.
[firewall]
/
bookends.m4
diff --git
a/bookends.m4
b/bookends.m4
index
6ba2827
..
7374cd3
100644
(file)
--- a/
bookends.m4
+++ b/
bookends.m4
@@
-52,16
+52,24
@@
setopt ip_local_port_range $open_port_min $open_port_max
## Deploy SYN-cookies if necessary.
setopt tcp_syncookies 1
## Deploy SYN-cookies if necessary.
setopt tcp_syncookies 1
+## Allow broadcast and multicast ping, because it's a useful diagnostic tool.
+setopt icmp_echo_ignore_broadcasts 0
+
## Turn off iptables filtering for bridges. We'll use ebtables if we need
## to; but right now the model is that we do filtering at the borders, and
## are tolerant of things which are local.
## Turn off iptables filtering for bridges. We'll use ebtables if we need
## to; but right now the model is that we do filtering at the borders, and
## are tolerant of things which are local.
-for filter in arptables iptables ip6tables; do
- run sysctl -q net/bridge/bridge-nf-call-$filter=0
-done
+if [ -x /sbin/brctl ]; then
+ modprobe bridge || :
+ if [ -d /proc/sys/net/bridge ]; then
+ for filter in arptables iptables ip6tables; do
+ run sysctl -q net.bridge.bridge-nf-call-$filter=0
+ done
+ fi
+fi
## Turn on the reverse-path filter, and log weird things.
## Turn on the reverse-path filter, and log weird things.
-setdevopt rp_filter
1
-setdevopt log_martians
1
+setdevopt rp_filter
$rp_filter
+setdevopt log_martians
$log_martians
## Turn off things which can mess with our routing decisions.
setdevopt accept_source_route 0
## Turn off things which can mess with our routing decisions.
setdevopt accept_source_route 0
@@
-96,7
+104,7
@@
errorchain interesting ACCEPT
m4_divert(36)m4_dnl
###--------------------------------------------------------------------------
m4_divert(36)m4_dnl
###--------------------------------------------------------------------------
-### Standard
loopback stuff
.
+### Standard
filtering
.
## Don't clobber local traffic
run ip46tables -A INPUT -i lo -j ACCEPT
## Don't clobber local traffic
run ip46tables -A INPUT -i lo -j ACCEPT
@@
-130,17
+138,21
@@
for x in 0 1 2 3 4 5 6 7 8 9 a b c d e f; do
-d fe${x}2::/16
done
-d fe${x}2::/16
done
+## Add a hook for fail2ban.
+clearchain fail2ban
+run ip46tables -A INPUT -j fail2ban
+
m4_divert(90)m4_dnl
###--------------------------------------------------------------------------
### Finishing touches.
m4_divert(94)m4_dnl
## Locally generated packets are all OK.
m4_divert(90)m4_dnl
###--------------------------------------------------------------------------
### Finishing touches.
m4_divert(94)m4_dnl
## Locally generated packets are all OK.
-run iptables -P OUTPUT ACCEPT
+run ip
46
tables -P OUTPUT ACCEPT
## Other incoming things are forbidden.
for chain in INPUT FORWARD; do
## Other incoming things are forbidden.
for chain in INPUT FORWARD; do
- run iptables -A $chain -g forbidden
+ run ip
46
tables -A $chain -g forbidden
done
m4_divert(-1)
done
m4_divert(-1)