OpenVPN: working Static IP addresses for VPN clients

[Reiner030]

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OpenVPN pool can't assign dedicated IP addresses even override fields are implemented.

As already twice commented on other issues the implementation of manual pool range is missing for OpenVPN:

server 10.30.7.0 255.255.255.0 nopool
ifconfig-pool 10.30.7.20 10.30.7.200

Setup of these configuration parameters

because in actual implementation the client gets only the assigned IP address when address is not already dynamically in use by other client.

patch attached

[Reiner030]

PR again not referenced... => https://github.com/opnsense/core/pull/7568

Suggestion in https://github.com/opnsense/core/issues/7316#issuecomment-2191126783 would be also nice but because an additional file and optional TTL are needed this needs another PR

--ifconfig-pool-persist args Persist/unpersist ifconfig-pool data to file, at seconds intervals (default 600), as well as on program startup and shutdown. Valid syntax: ifconfig-pool-persist file [seconds]