Openvpn ssl/tls peer to peer with teltonika router



  • hello,

    i have a strange problem in building a site to site vpn with my teltonika umts router.

    i have configured my server with ssl/tls peer to peer defined al certs and all network and the vpn network as /30

    when i start the vpn client this is the log:

    
    Aug  3 21:45:43 openvpn(client)[3451]: WARNING: No server certificate verification method has been enabled.  See http://openvpn.net/howto.html#mitm for more info.
    Aug  3 21:45:43 openvpn(client)[3451]: NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables
    Aug  3 21:45:43 openvpn(client)[3451]: Re-using SSL/TLS context
    Aug  3 21:45:43 openvpn(client)[3451]: LZO compression initialized
    Aug  3 21:45:43 openvpn(client)[3451]: Control Channel MTU parms [ L:1542 D:138 EF:38 EB:0 ET:0 EL:0 ]
    Aug  3 21:45:43 openvpn(client)[3451]: Socket Buffers: R=[163840->131072] S=[163840->131072]
    Aug  3 21:45:43 openvpn(client)[3451]: Data Channel MTU parms [ L:1542 D:1450 EF:42 EB:135 ET:0 EL:0 AF:3/1 ]
    Aug  3 21:45:43 openvpn(client)[3451]: UDPv4 link local: [undef]
    Aug  3 21:45:43 openvpn(client)[3451]: UDPv4 link remote: x.x.x.x:1196
    Aug  3 21:45:44 openvpn(client)[3451]: TLS: Initial packet from x.x.x.x:1196, sid=c018e59a 61852cf4
    Aug  3 21:45:50 openvpn(client)[3451]: VERIFY OK: depth=1, /C=IT/ST=xxxx/L=xxxxx/O=xxx/emailAddress=admin@xxxx.it/CN=openvpn-ca-aps-sf
    Aug  3 21:45:50 openvpn(client)[3451]: VERIFY OK: depth=0, /C=IT/ST=xxxxx/L=xxxxx/O=xxxx/emailAddress=admin@xxxx.it/CN=openvpn-aps-sf-server
    Aug  3 21:45:54 openvpn(client)[3451]: Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key
    Aug  3 21:45:54 openvpn(client)[3451]: Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
    Aug  3 21:45:54 openvpn(client)[3451]: Data Channel Decrypt: Cipher 'BF-CBC' initialized with 128 bit key
    Aug  3 21:45:54 openvpn(client)[3451]: Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
    Aug  3 21:45:54 openvpn(client)[3451]: Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 2048 bit RSA
    Aug  3 21:45:54 openvpn(client)[3451]: [openvpn-aps-sf-server] Peer Connection Initiated with x.x.x.x:1196
    Aug  3 21:45:56 openvpn(client)[3451]: SENT CONTROL [openvpn-aps-sf-server]: 'PUSH_REQUEST' (status=1)
    Aug  3 21:45:57 openvpn(client)[3451]: PUSH: Received control message: 'PUSH_REPLY,route 192.168.0.0 255.255.255.0,route 10.10.5.0 255.255.255.0'
    Aug  3 21:45:57 openvpn(client)[3451]: OPTIONS IMPORT: route options modified
    Aug  3 21:45:57 openvpn(client)[3451]: OpenVPN ROUTE: OpenVPN needs a gateway parameter for a --route option and no default was specified by either --route-gateway or --ifconfig options
    Aug  3 21:45:57 openvpn(client)[3451]: OpenVPN ROUTE: failed to parse/resolve route for host/network: 192.168.0.0
    Aug  3 21:45:57 openvpn(client)[3451]: OpenVPN ROUTE: OpenVPN needs a gateway parameter for a --route option and no default was specified by either --route-gateway or --ifconfig options
    Aug  3 21:45:57 openvpn(client)[3451]: OpenVPN ROUTE: failed to parse/resolve route for host/network: 10.10.5.0
    Aug  3 21:45:57 netifd: Interface 'vpn' is now up
    Aug  3 21:45:57 openvpn(client)[3451]: TUN/TAP device tun0 opened
    Aug  3 21:45:57 openvpn(client)[3451]: TUN/TAP TX queue length set to 100
    Aug  3 21:45:57 openvpn(client)[3451]: Initialization Sequence Completed
    Aug  3 21:45:57 firewall: Reloading firewall due to ifup of vpn (tun0)
    
    

    if i change the vpn network tab in server to /24 the client with the same configuration got connected and i can ping it but the other end network got unreacheable due to incorrect automatic routing table( as i can see there is a 10.0.0.2 as gateway from route but the client got 10.0.0.6).

    f i change back the configuration with peer to peer it works correctly as expected but not if router reboots. i have to do the same trick.

    can you explain or suggest me any kind of resolution/workaround?

    thanks a lot



  • i want to add something i forgot:

    on client side when the openvpn process i s finished(as previous code) the tun interface came up without ip address. when i do the trick there is no problem.

    thanks again