bc9f8d4fff
Fixes bug 975043 Since Essex, all instances will have an eth0 MAC address in the range of FA:16:3E, which is near the end of the MAC address space. When openvpn is started, a TAP interface is created with a random generated MAC address. Chances are high the generated MAC address is lower in value than the eth0 MAC address. Once the tap interface is added to the bridge interface, the bridge interface will no longer have the eth0 MAC address, but take over the TAP MAC address. This is a feature of the linux kernel, whereby a bridge interface will take the MAC address with the lowest value amongst its interfaces. After the ARP entries expire, this will result in the cloudpipe instance being no longer reachable. This fix, randomly generates a MAC address starting with FA:17:3E, which is greater than FA, and will thus ensure the brige will keep the eth0 MAC address. Change-Id: I0bd994b6dc7a92738ed23cd62ee42a021fd394e2
57 lines
2.4 KiB
Bash
Executable File
57 lines
2.4 KiB
Bash
Executable File
#!/bin/bash
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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# This gets zipped and run on the cloudpipe-managed OpenVPN server
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export LC_ALL=C
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export VPN_IP=`ifconfig | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f2 | awk '{print $$1}'`
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export BROADCAST=`ifconfig | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f3 | awk '{print $$1}'`
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export DHCP_MASK=`ifconfig | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f4 | awk '{print $$1}'`
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export GATEWAY=`netstat -r | grep default | cut -d' ' -f10`
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# Need a higher valued MAC address than eth0, to prevent the TAP MAC address
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# from becoming the bridge MAC address. Since Essex eth0 MAC starts with
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# FA:16:3E, we'll thus generate a MAC starting with FA:17:3E to be higher than eth0.
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export RANDOM_TAP_MAC=`openssl rand -hex 8 | sed 's/\(..\)/\1:/g' | cut -b-8 | awk '{print "FA:17:3E:"$$1}'`
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DHCP_LOWER=`echo $$BROADCAST | awk -F. '{print $$1"."$$2"."$$3"." $$4 - ${num_vpn} }'`
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DHCP_UPPER=`echo $$BROADCAST | awk -F. '{print $$1"."$$2"."$$3"." $$4 - 1 }'`
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# generate a server DH
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openssl dhparam -out /etc/openvpn/dh1024.pem 1024
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cp crl.pem /etc/openvpn/
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cp server.key /etc/openvpn/
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cp ca.crt /etc/openvpn/
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cp server.crt /etc/openvpn/
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# Customize the server.conf.template
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cd /etc/openvpn
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sed -e s/VPN_IP/$$VPN_IP/g server.conf.template > server.conf
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sed -i -e s/DHCP_SUBNET/$$DHCP_MASK/g server.conf
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sed -i -e s/DHCP_LOWER/$$DHCP_LOWER/g server.conf
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sed -i -e s/DHCP_UPPER/$$DHCP_UPPER/g server.conf
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sed -i -e s/max-clients\ 1/max-clients\ 10/g server.conf
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echo "push \"route ${dmz_net} ${dmz_mask} $$GATEWAY\"" >> server.conf
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echo "duplicate-cn" >> server.conf
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echo "crl-verify /etc/openvpn/crl.pem" >> server.conf
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echo "lladdr $$RANDOM_TAP_MAC" >> server.conf
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/etc/init.d/openvpn start
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