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network_stuff:vpn_troubleshooting

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network_stuff:vpn_troubleshooting [2019/12/30 12:05] – 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 # to create profiles+
  
  
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   May  9 05:16:22 observium xl2tpd: xl2tpd[23954]: Connection 61860 closed to 148.64.56.150, port 1701 (Timeout)    May  9 05:16:22 observium xl2tpd: xl2tpd[23954]: Connection 61860 closed to 148.64.56.150, port 1701 (Timeout) 
  
 +
 +LIBRESWAN STRONGSWAN NOTES:
 +  * [[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/]]
 +  * pluto is is an IKE ("IPsec Key Exchange") daemon
 +
 +  yum install libreswan
 +  ipsec initnss
 +  systemctl enable 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"
 +  * 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.1577707509.txt.gz · Last modified: (external edit)

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