Re: [Nufw-users] How to get the right certificate when using nutcpc to connect to NuFW

[Eric Leblond]

Hi,

Le mercredi 28 octobre 2009 à 16:20 +0700, Nguyen Anh Dung a écrit :
> Hi All,
> I'm a newbie to NuFW and i'm trying to install NuFW from source code
> in Trustix Linux 3.0.5 (kernel 2.6.19.7-3). After several days of
> wrestling :P, i installed it successfully as guided in the handbook
> 2.2.
> I do everything as guided in the handbook from step 3.5.1 to step
> 3.6.3 (with common name in certificate is 'right' (my hostname)).
> 
> However, when i used nutcpc to connect to NuFW, there are errors:
> 
> nutcpc -N -d -C /etc/nufw/nufw-cert.pem -A /etc/nufw/NuFW-cacert.pem
> -K /etc/nufw/nufw-key.pem -H right
> Error in client
>    Connecting to NuFW gateway (right)
>    Unable to initate connection to NuFW gateway
>    Problem: Certificate authority verification failed: invalid, signer not 
> found
>    Authentication failed (check parameters)
> Error in server
>    ** Message: [7] TLS Handshaking (last error: 0)
>    ** Message: [4] TLS handshake has failed (The peer did not send any
> certificate.)
>    ** Message: [4] Failed connection from client 127.0.0.1
>    GNUTLS ERROR: Error in the push function
>    Unable to setup connect

This error is commonly found when client and server do not used the same
certificate authority. Please check that nuauth is using a certificate
provided by NuFW-cacert.pem. If this is not the case, nutcpc will not
send its certificate to the server because it has no certificate the
server can check.

BR,

> 
> nutcpc -N -d -U root -H right (as in the guideline)
> Error in client
>     *******    WARNING   ******
>     You are trying to connect to nuauth without configuring a
> certificate authority (CA)
>     You are vulnerable to attack like man-in-the-middle.
>     Do you really want to do that? Type "yes" to continue: yes
>     Connecting to NuFW gateway (127.0.0.1)
>     TLS error: server request certificate, none configured
>     Unable to initate connection to NuFW gateway
>     Problem: Certificate authority verification failed: invalid,
> signer not found
>     Authentication failed (check parameters)
> Error in server
>    WARNING: you have not provided any certificate authority.
>    nutcpc will *NOT* verify server certificate trust.
>    Use the -A <cafile> option to setup CA.
>    As certificate will not be trusted, disabling FQDN check.
>    ** Message: [7] TLS Handshaking (last error: 0)
>    ** Message: [4] TLS handshake has failed (The peer did not send any
> certificate.)
>    ** Message: [4] Failed connection from client 127.0.0.1
>    GNUTLS ERROR: Error in the push function
>    Unable to setup connect
> 
> I use "netstat -np" and confirm that nuauth has connected to NuFW.
> 
> BTW, nutcpc have 3 options, -C, -A, and -K. I can understand -K but
> confuse about -A and -C. How can i distinguish them and create them?

-A : certificate authority : the public certificate of the PKI
-K : the private key
-C : the certificate (corresponding to the private key)

> 
> P/S: Is there any one who only follow the instructions in the handbook
> can make NuFW work?

Looks like some have succedeed ;)

BR,

> 
> Thank you so much.
> Dzung Nguyen.
> 
> 
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> Nufw-users mailing list
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> http://lists.nongnu.org/mailman/listinfo/nufw-users

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