Rudder

I have two networks linked by a VPN (OpenPVN) and the distant VPN server (in the "network A") can't receive his promises from the Rudder server (in the "net B"). All other clients, even in the distant network (A), work properly.

Network A : 192.168.92.0/24
Network B : 192.168.108.0/24

As I understand, the problem seems to be that when my distant VPN server was accepted on the Rudder server, it was registred with its "eth0" interface address IP. But now, when asking to receive his promises, it ask with its "tun0" interface address IP which is 10.8.0.1. So it is rejected by the Rudder server because of the UUID doesn't match with the IP previously registred. Here are the debug informations from cf-serverd :

rudder>  -> Accepting a connection
rudder> Obtained IP address of 10.8.0.1 on socket 7 from accept
rudder> Accepting connection from "10.8.0.1" 
rudder> New connection...(from 10.8.0.1:sd 7)
rudder> Spawning new thread...
rudder> Allowing 10.8.0.1 to connect without (re)checking ID
rudder> Non-verified Host ID is 10.8.0.1 (Using skipverify)
rudder> Non-verified User ID seems to be root (Using skipverify)
rudder>  -> Public key identity of host "10.8.0.1" is "MD5=cb8201b1bca81bc884557edc12dcb9d3" 
rudder> A public key was already known from 10.8.0.1/10.8.0.1 - no trust required
rudder> Adding IP 10.8.0.1 to SkipVerify - no need to check this if we have a key
rudder> The public key identity was confirmed as root@10.8.0.1
rudder>  -> Strong authentication of client 10.8.0.1/10.8.0.1 achieved
rudder>  -> Receiving session key from client (size=256)...
rudder> Filename /var/rudder/share/dd3c2ec5-69cb-47ea-b2b4-bb8fb129e997/rules/cfengine-community/rudder_promises_generated is resolved to /var/rudder/share/dd3c2ec5-69cb-47ea-b2b4-bb8fb129e997/rules/cfengine-community/rudder_promises_generated
rudder> Found a matching rule in access list (/var/rudder/share/dd3c2ec5-69cb-47ea-b2b4-bb8fb129e997/rules/cfengine-community/rudder_promises_generated in /var/rudder/share/dd3c2ec5-69cb-47ea-b2b4-bb8fb129e997)
rudder> Host 10.8.0.1 denied access to /var/rudder/share/dd3c2ec5-69cb-47ea-b2b4-bb8fb129e997/rules/cfengine-community/rudder_promises_generated
rudder> Access control in sync
rudder> From (host=10.8.0.1,user=root,ip=10.8.0.1)
rudder> REFUSAL of request from connecting host: (SYNCH 1397134555 STAT /var/rudder/share/dd3c2ec5-69cb-47ea-b2b4-bb8fb129e997/rules/cfengine-community/rudder_promises_generated)
rudder> Terminating thread...

I added the tunnel network 10.8.0.0/30 in the authorized network in the administration panel, but still doesn't work. Routing is OK, everything ping correctly.