147 lines
4.6 KiB
Text
147 lines
4.6 KiB
Text
# -------- CUSTOMIZATION REQUIRED --------
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#
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# The VPNServer service sets up the OpenVPN server for building VPN tunnels
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# that allow access via TUN/TAP device to private networks.
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#
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# note that the IPForward and DefaultRoute services should be enabled
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# directory containing the certificate and key described below, in addition to
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# a CA certificate and DH key
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keydir=/etc/core/keys
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# the name used for a "$keyname.crt" certificate and "$keyname.key" private key.
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keyname=server2
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# the VPN subnet address from which the client VPN IP (for the TUN/TAP)
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# will be allocated
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vpnsubnet=10.0.200.0
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# public IP address of this vpn server (same as VPNClient vpnserver= setting)
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vpnserver=10.0.2.10
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# optional list of private subnets reachable behind this VPN server
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# each subnet and next hop is separated by a space
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# "<subnet1>,<nexthop1> <subnet2>,<nexthop2> ..."
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privatenets="10.0.11.0,10.0.10.1 10.0.12.0,10.0.10.1"
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# optional list of VPN clients, for statically assigning IP addresses to
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# clients; also, an optional client subnet can be specified for adding static
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# routes via the client
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# Note: VPN addresses x.x.x.0-3 are reserved
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# "<keyname>,<vpnIP>,<subnetIP> <keyname>,<vpnIP>,<subnetIP> ..."
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vpnclients="client1KeyFilename,10.0.200.5,10.0.0.0 client2KeyFilename,,"
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# NOTE: you may need to enable the StaticRoutes service on nodes within the
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# private subnet, in order to have routes back to the client.
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# /sbin/ip ro add <vpnsubnet>/24 via <vpnServerRemoteInterface>
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# /sbin/ip ro add <vpnClientSubnet>/24 via <vpnServerRemoteInterface>
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# -------- END CUSTOMIZATION --------
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echo > $PWD/vpnserver.log
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rm -f -r $PWD/ccd
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# validate key and certification files
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if [ ! -e $keydir\/$keyname.key ] || [ ! -e $keydir\/$keyname.crt ] \
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|| [ ! -e $keydir\/ca.crt ] || [ ! -e $keydir\/dh1024.pem ]; then
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echo "ERROR: missing certification or key files under $keydir \
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$keyname.key or $keyname.crt or ca.crt or dh1024.pem" >> $PWD/vpnserver.log
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fi
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# validate configuration IP addresses
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checkip=0
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if [ "$(dpkg -l | grep " sipcalc ")" = "" ]; then
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echo "WARNING: ip validation disabled because package sipcalc not installed\
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" >> $PWD/vpnserver.log
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checkip=1
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else
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if [ "$(sipcalc "$vpnsubnet" "$vpnserver" | grep ERR)" != "" ]; then
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echo "ERROR: invalid vpn subnet or server address \
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$vpnsubnet or $vpnserver " >> $PWD/vpnserver.log
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fi
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fi
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# create client vpn ip pool file
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(
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cat << EOF
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EOF
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)> $PWD/ippool.txt
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# create server.conf file
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(
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cat << EOF
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# openvpn server config
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local $vpnserver
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server $vpnsubnet 255.255.255.0
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push redirect-gateway def1
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EOF
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)> $PWD/server.conf
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# add routes to VPN server private subnets, and push these routes to clients
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for privatenet in $privatenets; do
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if [ $privatenet != "" ]; then
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net=${privatenet%%,*}
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nexthop=${privatenet##*,}
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if [ $checkip = "0" ] &&
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[ "$(sipcalc "$net" "$nexthop" | grep ERR)" != "" ]; then
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echo "ERROR: invalid vpn server private net address \
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$net or $nexthop " >> $PWD/vpnserver.log
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fi
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echo push route $net 255.255.255.0 >> $PWD/server.conf
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/sbin/ip ro add $net/24 via $nexthop
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/sbin/ip ro add $vpnsubnet/24 via $nexthop
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fi
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done
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# allow subnet through this VPN, one route for each client subnet
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for client in $vpnclients; do
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if [ $client != "" ]; then
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cSubnetIP=${client##*,}
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cVpnIP=${client#*,}
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cVpnIP=${cVpnIP%%,*}
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cKeyFilename=${client%%,*}
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if [ "$cSubnetIP" != "" ]; then
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if [ $checkip = "0" ] &&
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[ "$(sipcalc "$cSubnetIP" "$cVpnIP" | grep ERR)" != "" ]; then
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echo "ERROR: invalid vpn client and subnet address \
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$cSubnetIP or $cVpnIP " >> $PWD/vpnserver.log
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fi
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echo route $cSubnetIP 255.255.255.0 >> $PWD/server.conf
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if ! test -d $PWD/ccd; then
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mkdir -p $PWD/ccd
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echo client-config-dir $PWD/ccd >> $PWD/server.conf
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fi
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if test -e $PWD/ccd/$cKeyFilename; then
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echo iroute $cSubnetIP 255.255.255.0 >> $PWD/ccd/$cKeyFilename
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else
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echo iroute $cSubnetIP 255.255.255.0 > $PWD/ccd/$cKeyFilename
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fi
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fi
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if [ "$cVpnIP" != "" ]; then
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echo $cKeyFilename,$cVpnIP >> $PWD/ippool.txt
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fi
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fi
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done
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(
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cat << EOF
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keepalive 10 120
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ca $keydir/ca.crt
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cert $keydir/$keyname.crt
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key $keydir/$keyname.key
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dh $keydir/dh1024.pem
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cipher AES-256-CBC
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status /var/log/openvpn-status.log
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log /var/log/openvpn-server.log
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ifconfig-pool-linear
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ifconfig-pool-persist $PWD/ippool.txt
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port 1194
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proto udp
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dev tun
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verb 4
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daemon
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EOF
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)>> $PWD/server.conf
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# start vpn server
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openvpn --config server.conf
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