OpenVPN authentication server 0.10

OpenVPN authentication server is a project which allows you to add very flexible authentication for your OpenVPN server.
OpenVPN authentication server provides very flexible authentication (LDAP, Kerberos, Radius, PAM, SASL, File, SQL, IMAP, POP3) for your OpenVPN server. You can also retrieve per-client configuration in your LDAP server.
Main features:
- Very flexible authentication configuration
- Chainable authentication backends. You can mix several authentication backends
- Authentication server written in perl
- Authentication server can run completely in chroot (recommended)
- Authentication client written in C
- Authentication client can run completely in chroot if OpenVPN server is chrooted
- Supports almost all existing authentication backends.
- Supported authentication backends:
- LDAP
- Kerberos5 (works also with Microsoft AD)
- any SQL database supported by perl DBI driver
- IMAPv4 server
- POP3 server
- plain file
- SASL library
- PAM library
- Radius service
- custom certificate validation algorithm.