Thibault Le Meur wrote:
Openvpn sometimes needs to renegotiate the connections and thus sends authentication requests while the connection is still active (with an already assigned IP address): this causes FR to assign a new IP address from the pool (which seems normal since FR has no way to know this is a renegotiation).
So why isn't the radiusplugin telling FreeRADIUS what the old IP address was?
I'd like to patch the openvpn-radiusplugin so that an extra attribute is sent in the Access-Accept packets so that FR will be able to differentiate Initial and Renegociation Access-Accept requests and only assign new IP address from the pool on Initial Access-Accept requests.
I think you mean Access-Request packet. If it doesn't have a Framed-IP-Address attribute, FreeRADIUS can allocate & send one in an Access-Accept. If openvpn re-authenticates a session with an existing IP address, it should send Framed-IP-Address in the Access-Request.
Do you know a standard Radius attribute that could be used for this ? As far as you know, are there other NASes using such a quirk ? Does this make sense ?
It makes sense. Alan DeKok. -- http://deployingradius.com - The web site of the book http://deployingradius.com/blog/ - The blog