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178 lines
4.7 KiB
178 lines
4.7 KiB
#!/bin/bash
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#
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BORDER=">>>>>>>>>>>>>>"
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printf "$BORDER Installing openvpn and EasyRSA $BORDER \n\n"
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sudo apt-get update -y
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sudo apt-get install openvpn easy-rsa -y
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printf "$BORDER Setting default openvpn vars $BORDER \n\n"
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make-cadir ~/openvpn-ca
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cd ~/openvpn-ca
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sed -i "s/KEY_PROVINCE=\"CA\"/KEY_PROVINCE=\"NM\"/g" vars
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sed -i "s/KEY_CITY=\"SanFrancisco\"/KEY_CITY=\"Albuquerque\"/g" vars
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sed -i "s/KEY_ORG=\"Fort-Funston\"/KEY_ORG=\"BreakpointingBad\"/g" vars
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sed -i "s/KEY_NAME=\"EasyRSA\"/KEY_NAME=\"server\"/g" vars
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sed -i 's/--interact//' build-ca
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sed -i 's/--interact//' build-key-server
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sed -i 's/--interact//' build-dh
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sed -i 's/--interact//' build-key
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cd ~/openvpn-ca
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source vars
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printf "$BORDER Building the certificate authority $BORDER \n\n"
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./clean-all
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./build-ca
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printf "$BORDER Creating the server certificate $BORDER \n\n"
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./build-key-server server
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printf "$BORDER Generating Diffie-Hellman keys to use during key exchange $BORDER \n\n"
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./build-dh
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printf "$BORDER Generating HMAC signature to strengthen the server’s TLS integrity verification"
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openvpn --genkey --secret keys/ta.key
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printf "$BORDER Generating client certificate and key pair $BORDER \n\n"
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cd ~/openvpn-ca
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source vars
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./build-key client1
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printf "$BORDER Configuring the openvpn service using generated keys + certs $BORDER \n\n"
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cd ~/openvpn-ca/keys
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sudo cp ca.crt server.crt server.key ta.key dh2048.pem /etc/openvpn
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gunzip -c /usr/share/doc/openvpn/examples/sample-config-files/server.conf.gz | sudo tee /etc/openvpn/server.conf
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sudo sed -i "s/;tls-auth ta.key 0/tls-auth ta.key 0/g" /etc/openvpn/server.conf
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sudo sed -i "s/;cipher AES-128-CBC/cipher AES-128-CBC/g" /etc/openvpn/server.conf
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sudo sed -i "s/;user nobody/user nobody/g" /etc/openvpn/server.conf
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sudo sed -i "s/;group nogroup/group nogroup/g" /etc/openvpn/server.conf
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#sudo sed -i "s/;push \"redirect-gateway def1 bypass-dhcp\"/push \"redirect-gateway def1 bypass-dhcp\"/g" /etc/openvpn/server.conf
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#sudo sed -i "s/;push \"dhcp-option DNS 208.67.222.222\"/push \"dhcp-option DNS 208.67.222.222\"/g" /etc/openvpn/server.conf
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#sudo sed -i "s/;push \"dhcp-option DNS 208.67.220.220\"/push \"dhcp-option DNS 208.67.220.220\"/g" /etc/openvpn/server.conf
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sudo bash -c 'cat >> /etc/openvpn/server.conf << EOF
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auth SHA256
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EOF'
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sudo sed -i "s/port 1194/port 443/g" /etc/openvpn/server.conf
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sudo sed -i "s/proto udp/proto tcp/g" /etc/openvpn/server.conf
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printf "$BORDER Adjusting the servers network config to allow for vpn things $BORDER \n\n"
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sudo sed -i "s/#net.ipv4.ip_forward=1/net.ipv4.ip_forward=1/g" /etc/sysctl.conf
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sudo sysctl -p
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sudo bash -c 'cat >> /etc/ufw/before.rules << EOF
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# START OPENVPN RULES
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# NAT table rules
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*nat
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:POSTROUTING ACCEPT [0:0]
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# Allow traffic from OpenVPN client to enp0s8
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-A POSTROUTING -s 10.8.0.0/8 -o enp0s8 -j MASQUERADE
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COMMIT
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# END OPENVPN RULES
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EOF'
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sudo sed -i "s/DEFAULT_FORWARD_POLICY=\"DROP\"/DEFAULT_FORWARD_POLICY=\"ACCEPT\"/g" /etc/default/ufw
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sudo ufw allow 443/tcp
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sudo ufw allow OpenSSH
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sudo ufw disable
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sudo ufw --force enable
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printf "$BORDER Enabling the openvpn service $BORDER \n\n"
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sudo systemctl start openvpn@server
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sudo systemctl enable openvpn@server
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BORDER=">>>>>>>>>>>>>>>>"
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printf "$BORDER Setting up base client config file\n\n"
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mkdir -p ~/client-configs/files
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chmod 700 ~/client-configs/files
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cp /usr/share/doc/openvpn/examples/sample-config-files/client.conf ~/client-configs/base.conf
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sed -i "s/my-server-1 1194/192.168.2.2 443/g" ~/client-configs/base.conf
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sed -i "s/proto udp/proto tcp/g" ~/client-configs/base.conf
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sed -i "s/;user nobody/user nobody/g" ~/client-configs/base.conf
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sed -i "s/;group nobody/group nobody/g" ~/client-configs/base.conf
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sed -i "s/ca ca.crt/# ca ca.crt/g" ~/client-configs/base.conf
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sed -i "s/cert client.crt/# cert client.crt/g" ~/client-configs/base.conf
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sed -i "s/key client.key/# key client.key/g" ~/client-configs/base.conf
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cat >> ~/client-configs/base.conf << EOF
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cipher AES-128-CBC
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auth SHA256
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key-direction 1
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# script-security 2
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# up /etc/openvpn/update-resolv-conf
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# down /etc/openvpn/update-resolv-conf
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EOF
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printf "$BORDER Creating make client config script..\n\n"
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touch ~/client-configs/make_config.sh
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cat >> ~/client-configs/make_config.sh << EOF
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# First argument: Client identifier
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KEY_DIR=~/openvpn-ca/keys
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OUTPUT_DIR=~/client-configs/files
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BASE_CONFIG=~/client-configs/base.conf
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cat \${BASE_CONFIG} <(echo -e '<ca>') \${KEY_DIR}/ca.crt <(echo -e '</ca>\n<cert>') \${KEY_DIR}/\${1}.crt <(echo -e '</cert>\n<key>') \${KEY_DIR}/\${1}.key <(echo -e '</key>\n<tls-auth>') \${KEY_DIR}/ta.key <(echo -e '</tls-auth>') > \${OUTPUT_DIR}/\${1}.ovpn
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EOF
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chmod 700 ~/client-configs/make_config.sh
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printf "$BORDER Making client config file for client1\n\n"
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cd ~/client-configs
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./make_config.sh client1
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ls ~/client-configs/files
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