[[ $EUID == 0 ]] || exec sudo -E "$BASH_SOURCE" "$@"
usage() {
- cat <<'EOF'
-usage: ${0##*/} [-d|-h|--help]
+ cat <<'EOF'
+usage: ${0##*/} [-d|-h|--help] [IPV6_ADDR/BITS IPV6_DEFAULT_ROUTE]
-r Do not push default route
-d Do not push dns
traffic goes through the vpn. requires systemd, and might have some
debian specific paths.
+For ipv6, we assume ipv6_addr routes to the server.
+
You can save all the keys by storing /etc/openvpn/easy-rsa/keys, and
the script will not generate them if it sees they exist already.
+For future updates to this script, this is a good place to
+take inspiration.
+https://github.com/angristan/openvpn-install/blob/master/openvpn-install.sh
+
Note: Uses GNU getopt options parsing style
EOF
- exit $1
+ exit $1
}
dns=true
temp=$(getopt -l help drsh "$@") || usage 1
eval set -- "$temp"
while true; do
- case $1 in
- -d) dns=false; shift ;;
- -r) route=false; shift ;;
- -s) start=false; shift ;;
- -h|--help) usage ;;
- --) shift; break ;;
- *) echo "$0: Internal error! unexpected args: $*" ; exit 1 ;;
- esac
+ case $1 in
+ -d) dns=false; shift ;;
+ -r) route=false; shift ;;
+ -s) start=false; shift ;;
+ -h|--help) usage ;;
+ --) shift; break ;;
+ *) echo "$0: Internal error! unexpected args: $*" ; exit 1 ;;
+ esac
done
+read -r ip6 ip6route <<<"$@"
+
+
apt-get update
-# suggests get's us openssl
+# suggests get's us openssl. policy-rc.d is to prevent install from starting services
+f=/usr/sbin/policy-rc.d;
+dd of=$f <<EOF
+#!/bin/sh
+exit 101
+EOF
+chmod +x $f;
apt-get install --install-suggests -y openvpn
+rm $f
+
if [[ -e /lib/systemd/system/openvpn-server@.service ]]; then
- vpn_service=openvpn-server@server
+ vpn_service=openvpn-server@server
else
- vpn_service=openvpn@server
+ vpn_service=openvpn@server
fi
apt-get install -y uuid-runtime easy-rsa
mkdir -p /etc/openvpn/easy-rsa
cd /etc/openvpn/easy-rsa
cp -r /usr/share/easy-rsa/* .
if [[ -e openssl-1.0.0.cnf && ! -e openssl.cnf ]]; then
- # there's a debian bug about this.
- ln -s openssl-1.0.0.cnf openssl.cnf
+ # there's a debian bug about this.
+ ln -s openssl-1.0.0.cnf openssl.cnf
+fi
+
+server_dir=/etc/openvpn/server
+mkdir -p $server_dir
+chmod 700 $server_dir
+
+
+new=true
+keyfiles=(/etc/openvpn/easy-rsa/pki/{ca.crt,private/server.key,issued/server.crt})
+if [[ -e /etc/openvpn/easy-rsa/build-ca ]]; then
+ new=false
+ keyfiles=(/etc/openvpn/easy-rsa/keys/{ca.crt,server.{crt,key}})
fi
keys_exist=true
-keyfiles=(/etc/openvpn/easy-rsa/keys/{ca.crt,server.{crt,key},dh2048.pem,ta.key})
for f in ${keyfiles[@]}; do
- if [[ ! -e $f ]]; then
- keys_exist=false
- break
- fi
+ if [[ ! -e $f ]]; then
+ keys_exist=false
+ break
+ fi
done
if ! $keys_exist; then
- source vars # dun care about setting cert cn etc from the non-example values
+ # newer sample configs (post stretch) use ta.key. no harm making it for earlier oses
+ openvpn --genkey --secret $server_dir/ta.key
+ if $new; then
+ ./easyrsa init-pki
+ ./easyrsa --batch build-ca nopass
+ ./easyrsa build-server-full server nopass
+ openssl dhparam -out $server_dir/dh2048.pem 2048
+ else
+ # dun care about settning cert cn etc from the non-example values
+ source vars
+ # doesnt exist in buster
./clean-all # note: removes and creates /etc/openvpn/easy-rsa/keys
- # newer sample configs (post stretch) use ta.key. no harm making it for earlier oses
- openvpn --genkey --secret /etc/openvpn/easy-rsa/keys/ta.key
# accept default prompts
echo -e '\n\n\n\n\n\n\n\n' | ./build-ca
# Note, this is not idempotent.
{ echo -e '\n\n\n\n\n\n\n\n\n\n'; sleep 1; echo -e 'y\ny\n'; } | ./build-key-server server
./build-dh
+ fi
fi
-server_dir=/etc/openvpn/server
-mkdir -p $server_dir
-chmod 700 $server_dir
cp /usr/share/doc/openvpn/examples/sample-config-files/server.conf.gz $server_dir
gzip -df $server_dir/server.conf.gz
cp ${keyfiles[@]} $server_dir
# for legacy systems
for f in ${keyfiles[@]}; do
- ln -sf server/${f##*/} /etc/openvpn
+ ln -sf server/${f##*/} /etc/openvpn
done
cat >>$server_dir/server.conf <<'EOF'
if $dns; then
- # Be the dns server for clients
- cat >>$server_dir/server.conf <<'EOF'
+ # Be the dns server for clients
+ cat >>$server_dir/server.conf <<'EOF'
push "dhcp-option DNS 10.8.0.1"
EOF
fi
+if $ip6; then
+ cat >>$server_dir/server.conf <<EOF
+push tun-ipv6 # legacy option that flidas needs, has no harm.
+ifconfig-ipv6 $ip6 $ip6_route
+EOF
+fi
+
+
if $route; then
- cat >>$server_dir/server.conf <<'EOF'
+ cat >>$server_dir/server.conf <<'EOF'
# Be the default gateway for clients.
push "redirect-gateway def1"
EOF
- echo "1" > /proc/sys/net/ipv4/ip_forward
- sed -i --follow-symlinks '/^ *net\.ipv4\.ip_forward=.*/d' /etc/sysctl.conf
- cat >>/etc/sysctl.conf <<'EOF'
-net.ipv4.ip_forward=1
+ if $ip6; then
+ cat >>$server_dir/server.conf <<'EOF'
+push "route-ipv6 2000::/3"
EOF
+ fi
+fi
+sed -i --follow-symlinks '/^ *net\.ipv4\.ip_forward=.*/d' /etc/sysctl.conf
+sed -i --follow-symlinks '/^ *net.ipv6.conf.all.forwarding=.*/d' /etc/sysctl.conf
+cat >>/etc/sysctl.conf <<'EOF'
+net.ipv4.ip_forward=1
+net.ipv6.conf.all.forwarding=1
+EOF
+sysctl -p /etc/sysctl.conf
- gw=$(ip route | sed -rn 's/^default via .* dev (\S+).*/\1/p')
+gw=$(ip route | sed -rn 's/^default via .* dev (\S+).*/\1/p')
- cat >/etc/systemd/system/vpnnat.service <<EOF
+cat >/etc/systemd/system/vpnnat.service <<EOF
[Unit]
Description=Turns on nat iptables setting
ExecStop=/sbin/iptables -t nat -D POSTROUTING -s 10.8.0.0/24 -o $gw -j MASQUERADE
[Install]
-WantedBy=$vpn_service
+WantedBy=$vpn_service.service
EOF
- systemctl daemon-reload # needed if the file was already there
- # note, no need to start it, the vpn_service does that.
-fi
+systemctl daemon-reload # needed if the file was already there
+# note, no need to start it, the vpn_service does that.
+systemctl enable vpnnat
if $start; then
- systemctl enable $vpn_service
- systemctl restart $vpn_service
+ systemctl enable $vpn_service
+ systemctl restart $vpn_service
fi
iankelling.org / git / vpn-setup / blobdiff