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network_stuff:vpn_troubleshooting

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network_stuff:vpn_troubleshooting [2020/05/27 16:03] – jotasandokunetwork_stuff:vpn_troubleshooting [2023/11/02 14:38] (current) – external edit 127.0.0.1
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----- + 
- +
-**OPENVPN SERVER RASPBERRY PI** +
-[[https://dzone.com/articles/how-to-setup-an-openvpn-server-on-a-raspberry-pi]]\\ +
-  curl -L https://install.pivpn.io | bash +
-  # set it as static, you shoud have configured the dhcp reservation and port forwarding in the gw before this! +
-  pivpn add nopass # to create profiles. IMPORTANT: in the .ovpn you have the static pub ip, Replece it with the DNS entry! +
-  # +
-  /var/log/openvpn-status.log       # just 3-4 lines with status +
-  /var/log/openvpn.log +
-  /etc/openvpn/server.conf +
-  # all fields nicely explained here : https://github.com/OpenVPN/openvpn/blob/master/sample/sample-config-files/server.conf +
-  +
  
  
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 LIBRESWAN STRONGSWAN NOTES: LIBRESWAN STRONGSWAN NOTES:
-  * [[https://docs.cloud.oracle.com/en-us/iaas/Content/Network/Concepts/libreswan.htm]]+  * [[https://docs.cloud.mycompany2.com/en-us/iaas/Content/Network/Concepts/libreswan.htm]]
   * [[https://dc77312.wordpress.com/2019/01/08/libreswan-ipsec-vpn-on-centos-7-and-windows-10/]]   * [[https://dc77312.wordpress.com/2019/01/08/libreswan-ipsec-vpn-on-centos-7-and-windows-10/]]
   * pluto is is an IKE ("IPsec Key Exchange") daemon   * pluto is is an IKE ("IPsec Key Exchange") daemon
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   systemctl enable ipsec   systemctl enable ipsec
   systemctl start ipsec   systemctl start ipsec
 +  
 +  # Use this to add and bring up the tunnel and see the exchange!
 +  ipsec auto --add mycompany2-tunnel-1
 +  ipsec auto --up mycompany2-tunnel-1
  
-  *   * In the vnic: "tick skip Source/Dest Checks"+ 
 +  * In the vnic: "tick skip Source/Dest Checks"
   * modify  /etc/sysctl.conf for forwarding [[https://www.tecmint.com/setup-ipsec-vpn-with-strongswan-on-centos-rhel-8/|External Link]]. In '/etc/sysctl.d' create a file named 50-libreswan.conf with that content   * modify  /etc/sysctl.conf for forwarding [[https://www.tecmint.com/setup-ipsec-vpn-with-strongswan-on-centos-rhel-8/|External Link]]. In '/etc/sysctl.d' create a file named 50-libreswan.conf with that content
-  * + 
 +  # https://libreswan.org/man/ipsec.conf.5.html 
 +  conn mycompany2-tunnel-1 
 +       left=10.156.0.23 
 +       # leftid=193.123.39.207 # This is the public IP (nat-t) 
 +       right=148.64.56.151 
 +       authby=secret 
 +       leftsubnet=10.181.181.0/24 
 +       rightsubnet=10.8.0.8/23 
 +       auto=start 
 +       mark=5/0xffffffff # Needs to be unique across all tunnels 
 +       vti-interface=vti0 
 +       vti-routing=no 
 +       ikev2=insist # To use IKEv2, change to ikev2=insist 
 +       ike=aes_cbc256-sha2_384;modp1536     # "cipher-hash;modpgroup,.."IKE encryption/authentication algorithm (and dh-modpgroup) to be used for the connection (phase 1 aka ISAKMP SA).  
 +       phase2alg=aes_gcm256;modp1536  # (alias esp) . Algorithms that will be offered/accepted for a phase2 negotiatio (~transform set) .format for ESP is ENC-AUTH followed by one optional PFSgroup. For instance, "3des-md5" or "aes256-sha1;modp2048" or "aes-sha1,aes-md5". When specifying multiple algorithms, specify the PFSgroup last, e.g. "3des-md5,aes256-sha1;modp2048".  
 +       encapsulation=yes 
 +       ikelifetime=28800s 
 +       salifetime=3600s 
 +        
 +        
 +  cat /etc/ipsec.d/oci-ipsec.secrets 
 +  my-pub-ip x-end-pub-ip : PSK "a64-charslongrandomstringgeneratedwithpwgenoropensslorothertool" 
 + 
 + 
 +---- 
 + 
 +CLASSY IPSEC-VPN TROUBLESHOOT: 
 +  * [[http://www.twine-networks.com/blog/posts/5-troubleshooting-ipsec-log-messages]] 
 +  * [[https://www.blackhole-networks.com/IKE_Modes/ikev1-quick.html]]
network_stuff/vpn_troubleshooting.1590595409.txt.gz · Last modified: (external edit)

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