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This section describes a trimmed-down installation of radsecproxy which enables it to augment any RADIUS
server with RADIUS/TLS transport, in order to enhance security. More precisely, with this setup radsecproxy will:

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  • radsecproxy version 1.4.2 or higher
  • The local RADIUS server's DEFAULT realm is configured to forward requests to the radsecproxy port on localhost.
  • The local RADIUS server has configured localhost as a client (this is typically the case).
  • The deployment requires a server certificate and a private key for that certificate to establish the RadSec connection which designates the server as an eduroam SP and IdP. For further information regarding eduroam certificates see this section.

Include Page
radsecproxy-installation
radsecproxy-installation

Sample configuration

Most of the radsecproxy configuration file is static. Therefore, a template configuration file is provided at http://www.eduroam.org/downloads/docs/eduroam-cookbook-scripts.zip. A detailed explanation of this configuration file follows, but if you are unwilling to read it all, the comments should make the configuration file almost self-explanatory and you can start and experiment with it right after the initial installation, which is explained below.

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Since there is a RADIUS server on the same host that occupies UDP/1812, radscproxy has to listen on a nonstandard port. It only needs to listen on the loopback device since it will only communicate with the RADIUS server on the same machine. The choice of 11812 is arbitrary and can be adapted if that port is in use. Since radsecproxy will also accept requests from an upstream RadSec-enabled server, it listens on the default TCP port for RadSec (2083) for requests from outside (the * meaning: all interfaces). If you want radsecproxy to listen only on specific interfaces, enter the interface names here. Beware: in this case you may also have to set the more exotic option SourceTCP (see the man page of radsecproxy for details).

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radsecproxy-general-settings
radsecproxy-general-settings

Client definition and request forwarding

To accept requests from the RADIUS server on localhost, this server needs to be listed as a client. That server may either use IPv4 or IPv6 for its communication, so both variants are defined. If your system is not IPv6-enabled, simply delete the stanza about client ::1. The _LOCAL_SECRET_ must match the secret which you configured in your RADIUS server for the server catering the DEFAULT realm.

Code Block
client localhost {
        host        127.0.0.1
        type        udp
        secret      __LOCAL_SECRET__
}

client ::1 {
        type        udp
        secret      __LOCAL_SECRET__
}

To accept requests from the upstream RADIUS/TLS-enabled server, this other server needs to be listed. Replace _RADSEC_PEER_ with the hostname of your upstream server. The traditional RADIUS shared secret has no meaning in RADIUS/TLS, and must instead be statically set to "radsec" throughout eduroam. This has no security implications.

Code Block
client _RADSEC_PEER_ {
        type        TLS
        secret     radsec
}

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There are some known client-side misconfigurations. If they were not already caught by the local RADIUS
server, it does not make sense for the proxy to send these requests up to the eduroam infrastructure. These
requests are immediately rejected.

Note: if you need to blacklist an existing realm for some reason, you can follow the myabc.com example,
copying and replacing it with the realm to be blacklisted.

Code Block
realm /myabc\.com$ {
         replymessage "Misconfigured client: default realm of Intel PRO/Wireless supplicant!"
}

realm /^$/ {
          replymessage "Misconfigured client: empty realm!"
}

Requests that are coming in from upstream and are supposed to be handled by the own RADIUS server are
listed in _OWN_REALM_. Create multiples of these stanzas if your local server serves more than one realm.

Code Block
realm /_OWN_REALM_$ {
             server localhost
}

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