OpenVPN RW: connection history shows the IP of the DHCP pool

[gsanchietti]

Steps to reproduce

• Create an OpenVPN Road Warrior instance
• Create a user and add it to the OpenVPN
• Make sure to create a reservation
• Establish a VPN connection using OpenVPN.
• Check the connection history in the database.
• Examine the log files (e.g., messages) to compare the IP addresses.

Expected behavior

• The connection history should reflect the virtual IP assigned to the user during the VPN session.

Actual behavior

• The connection history incorrectly displays an address from the DHCP pool instead of the real virtual IP assigned to the user.

Components
NethSecurity version: 8-23.05.5-ns.1.4.1

See also

• Extract from OpenVPN documentation:

  ifconfig_pool_remote_ip
  The remote virtual IP address for the TUN/TAP tunnel taken from an --ifconfig-push directive if specified, or otherwise from the ifconfig pool (controlled by the --ifconfig-pool config file directive). This option is set on the server prior to execution of the --client-connect and --client-disconnect scripts.
  

• Additional note:
  • The ifconfig_pool_remote_ip contains the IP from the pool, but this is not the real assigned IP if the user has a reservation. In such cases, the IP must be read from the configuration.

References

• https://partner.nethesis.it/t/connection-history-riporta-sempre-il-primo-ip-del-pool-dhcp/9118
• https://helpdesk.nethesis.it/a/tickets/185297

[github-actions]

Testing image

[gsanchietti]

Test case 1

• Check the issue is not reproducible

Test case 2

• Do the same test with a user without IP reservation
• Make sure the connection history reports the correct IP address

[francio87]

Fixed, tested with release 23.05.5-ns.1.4.1-42-g66ecef537

History :