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Better iptables handling

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Minor bugfixes for iptables handling
Removed CentOS 6 support
This commit is contained in:
wmtech-1 2018-03-13 19:55:41 +01:00 • committed by GitHub
parent 5dbab9fdbb
commit a7b4bb5dbd
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 24 additions and 10 deletions
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34
openvpn-install.sh
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@ -15,18 +15,28 @@ if [[ ! -e /dev/net/tun ]]; then
fi
if grep -qs "CentOS release 5" "/etc/redhat-release"; then
echo "CentOS 5 is too old and not supported"
echo "CentOS 5 is too old and not supported. Please upgrade to CentOS 7"
exit 3
fi
if grep -qs "CentOS release 6" "/etc/redhat-release"; then
echo "CentOS 6 is too old and no longer supported. Please upgrade to CentOS 7"
exit 4
fi
if [[ -e /etc/centos-release || -e /etc/redhat-release || -e /etc/system-release ]]; then
OS=centos
IPTABLES='/etc/iptables/iptables.rules'
IP6TABLES='/etc/ip6tables/ip6tables.rules'
if [[ -e /usr/lib/systemd/system/iptables.service ]]; then
IPTABLES='/etc/sysconfig/iptables'
IP6TABLES='/etc/sysconfig/ip6tables'
else
IPTABLES='/etc/iptables/iptables.rules'
IP6TABLES='/etc/ip6tables/ip6tables.rules'
fi
SYSCTL='/etc/sysctl.conf'
else
echo "Looks like you aren't running this installer on a CentOS or RedHat system"
exit 4
exit 5
fi
newclient () {
@ -100,7 +110,7 @@ if [[ -e /etc/openvpn/server.conf ]]; then
if [[ "$NUMBEROFCLIENTS" = '0' ]]; then
echo ""
echo "You have no existing clients!"
exit 5
exit 6
fi
echo ""
echo "Select the existing client certificate you want to revoke"
@ -149,6 +159,7 @@ if [[ -e /etc/openvpn/server.conf ]]; then
iptables -D INPUT -p tcp --dport $PORT -j ACCEPT
fi
iptables -D FORWARD -s 10.8.0.0/24 -j ACCEPT
iptables -D INPUT -i tun+ -j ACCEPT
iptables-save > $IPTABLES
fi
iptables -t nat -D POSTROUTING -o $NIC -s 10.8.0.0/24 -j MASQUERADE
@ -161,6 +172,7 @@ if [[ -e /etc/openvpn/server.conf ]]; then
ip6tables -D INPUT -p tcp --dport $PORT -j ACCEPT
fi
ip6tables -D FORWARD -s fd6c:62d9:eb8c::/112 -j ACCEPT
ip6tables -D INPUT -i tun+ -j ACCEPT
ip6tables-save > $IP6TABLES
fi
ip6tables -t nat -D POSTROUTING -o $NIC6 -s fd6c:62d9:eb8c::/112 -j MASQUERADE
@ -332,9 +344,9 @@ else
yum install epel-release -y
yum install openvpn iptables openssl wget ca-certificates curl -y
# Install iptables service
if [[ ! -e /etc/systemd/system/iptables.service ]]; then
if [[ ! -e /usr/lib/systemd/system/iptables.service && ! -e /etc/systemd/system/iptables.service ]]; then
mkdir /etc/iptables
iptables-save > /etc/iptables/iptables.rules
iptables-save > $IPTABLES
echo "#!/bin/sh
iptables -F
iptables -X
@ -367,9 +379,9 @@ WantedBy=multi-user.target" > /etc/systemd/system/iptables.service
fi
if [[ "$IPV6E" = '1' ]]; then
# Install ip6tables service
if [[ ! -e /etc/systemd/system/ip6tables.service ]]; then
if [[ ! -e /usr/lib/systemd/system/ip6tables.service && ! -e /etc/systemd/system/ip6tables.service ]]; then
mkdir /etc/ip6tables
ip6tables-save > /etc/ip6tables/ip6tables.rules
ip6tables-save > $IP6TABLES
echo "#!/bin/sh
ip6tables -F
ip6tables -X
@ -531,7 +543,7 @@ $CIPHER
tls-server
tls-version-min 1.2
tls-cipher TLS-DHE-RSA-WITH-AES-128-GCM-SHA256
status openvpn.log
status openvpn-status.log
log-append /var/log/openvpn/openvpn.log
verb 3
mute 3
@ -592,6 +604,7 @@ rcvbuf 393216" >> /etc/openvpn/server.conf
fi
iptables -I FORWARD -s 10.8.0.0/24 -j ACCEPT
iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
iptables -I INPUT -i tun+ -j ACCEPT
# Save persitent OpenVPN rules
iptables-save > $IPTABLES
fi
@ -613,6 +626,7 @@ rcvbuf 393216" >> /etc/openvpn/server.conf
fi
ip6tables -I FORWARD -s fd6c:62d9:eb8c::/112 -j ACCEPT
ip6tables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
ip6tables -I INPUT -i tun+ -j ACCEPT
# Save persitent OpenVPN rules
ip6tables-save > $IP6TABLES
fi