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Improve backup of IPTables rules

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This commit is contained in:
hwdsl2 2016-06-25 10:50:37 -05:00
parent 461dbc2fbc
commit fa704629f0
2 changed files with 8 additions and 6 deletions
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7
vpnsetup.sh
View File

@ -322,7 +322,6 @@ fi
# - If IPTables is "empty", simply write out the new rules.
# - If *not* empty, insert new rules and save them with existing ones.
if ! grep -qs "hwdsl2 VPN script" /etc/iptables.rules; then
/bin/cp -f /etc/iptables.rules "/etc/iptables.rules.old-$sys_dt" 2>/dev/null
service fail2ban stop >/dev/null 2>&1
if [ "$(iptables-save | grep -c '^\-')" = "0" ]; then
cat > /etc/iptables.rules <<EOF
@ -343,7 +342,7 @@ cat > /etc/iptables.rules <<EOF
-A INPUT -p udp --dport 1701 -j DROP
-A INPUT -j DROP
-A FORWARD -m conntrack --ctstate INVALID -j DROP
# To disallow (DROP) traffic between VPN clients themselves, uncomment these lines:
# Uncomment to DROP traffic between VPN clients themselves
# -A FORWARD -i ppp+ -o ppp+ -s 192.168.42.0/24 -d 192.168.42.0/24 -j DROP
# -A FORWARD -s 192.168.43.0/24 -d 192.168.43.0/24 -j DROP
-A FORWARD -i eth+ -o ppp+ -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
@ -365,6 +364,8 @@ EOF
else
iptables-save > "/etc/iptables.rules.old-$sys_dt"
iptables -I INPUT 1 -p udp -m multiport --dports 500,4500 -j ACCEPT
iptables -I INPUT 2 -p udp --dport 1701 -m policy --dir in --pol ipsec -j ACCEPT
iptables -I INPUT 3 -p udp --dport 1701 -j DROP
@ -374,7 +375,7 @@ iptables -I FORWARD 3 -i ppp+ -o eth+ -j ACCEPT
iptables -I FORWARD 4 -i ppp+ -o ppp+ -s 192.168.42.0/24 -d 192.168.42.0/24 -j ACCEPT
iptables -I FORWARD 5 -i eth+ -d 192.168.43.0/24 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
iptables -I FORWARD 6 -s 192.168.43.0/24 -o eth+ -j ACCEPT
# To disallow (DROP) traffic between VPN clients themselves, uncomment these lines:
# Uncomment to DROP traffic between VPN clients themselves
# iptables -I FORWARD 2 -i ppp+ -o ppp+ -s 192.168.42.0/24 -d 192.168.42.0/24 -j DROP
# iptables -I FORWARD 3 -s 192.168.43.0/24 -d 192.168.43.0/24 -j DROP
iptables -A FORWARD -j DROP

7
vpnsetup_centos.sh
View File

@ -327,7 +327,6 @@ fi
# - If IPTables is "empty", simply write out the new rules.
# - If *not* empty, insert new rules and save them with existing ones.
if ! grep -qs "hwdsl2 VPN script" /etc/sysconfig/iptables; then
/bin/cp -f /etc/sysconfig/iptables "/etc/sysconfig/iptables.old-$sys_dt" 2>/dev/null
service fail2ban stop >/dev/null 2>&1
if [ "$(iptables-save | grep -c '^\-')" = "0" ]; then
cat > /etc/sysconfig/iptables <<EOF
@ -348,7 +347,7 @@ cat > /etc/sysconfig/iptables <<EOF
-A INPUT -p udp --dport 1701 -j DROP
-A INPUT -j DROP
-A FORWARD -m conntrack --ctstate INVALID -j DROP
# To disallow (DROP) traffic between VPN clients themselves, uncomment these lines:
# Uncomment to DROP traffic between VPN clients themselves
# -A FORWARD -i ppp+ -o ppp+ -s 192.168.42.0/24 -d 192.168.42.0/24 -j DROP
# -A FORWARD -s 192.168.43.0/24 -d 192.168.43.0/24 -j DROP
-A FORWARD -i eth+ -o ppp+ -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
@ -369,6 +368,8 @@ EOF
else
iptables-save > "/etc/sysconfig/iptables.old-$sys_dt"
iptables -I INPUT 1 -p udp -m multiport --dports 500,4500 -j ACCEPT
iptables -I INPUT 2 -p udp --dport 1701 -m policy --dir in --pol ipsec -j ACCEPT
iptables -I INPUT 3 -p udp --dport 1701 -j DROP
@ -378,7 +379,7 @@ iptables -I FORWARD 3 -i ppp+ -o eth+ -j ACCEPT
iptables -I FORWARD 4 -i ppp+ -o ppp+ -s 192.168.42.0/24 -d 192.168.42.0/24 -j ACCEPT
iptables -I FORWARD 5 -i eth+ -d 192.168.43.0/24 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
iptables -I FORWARD 6 -s 192.168.43.0/24 -o eth+ -j ACCEPT
# To disallow (DROP) traffic between VPN clients themselves, uncomment these lines:
# Uncomment to DROP traffic between VPN clients themselves
# iptables -I FORWARD 2 -i ppp+ -o ppp+ -s 192.168.42.0/24 -d 192.168.42.0/24 -j DROP
# iptables -I FORWARD 3 -s 192.168.43.0/24 -d 192.168.43.0/24 -j DROP
iptables -A FORWARD -j DROP