Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have installed Apache on Ubuntu, installed GNUTLS module and everything worked fine:

root@ilnwad15:~# apache2 -v
Server version: Apache/2.2.22 (Ubuntu)
Server built:   Jul 12 2013 13:37:15

Now, I want that on port 1443, if the CA of the client certificate is not the CA on my server, then it will be blocked.

That's how I configured it on /etc/apache2/apache2.conf

Listen *:443
Listen *:1443
<VirtualHost *:443>
    GnuTLSEnable on
    GnuTLSKeyFile  /etc/apache2/certs/
    GnuTLSCertificateFile  /etc/apache2/certs/
    DocumentRoot /disk2/var/www/html
    GnuTLSPriorities EXPORT
    ServerName      ilnwad15

<VirtualHost *:1443>
    GnuTLSEnable on
    GnuTLSKeyFile /etc/apache2/certs/
    GnuTLSCertificateFile /etc/apache2/certs/
    GnuTLSPriorities EXPORT
    GnuTLSClientCAFile /etc/apache2/certs/ca.pem
    GNUTLSClientVerify require
    DocumentRoot /disk2/var/www/html
    ServerName ilnwad15

What it does now is, when sending a request with no certificate, getting internal error.

[root@ilnwadv56 ~]# wget --save-headers --no-check-certificate HTTPs://
--2013-12-18 17:23:01--
Resolving ilnwadv62...
Connecting to ilnwadv62||:18080... connected.
WARNING: cannot verify's certificate, issued by `/C=IL/L=Raanana/O=SAP/OU=AccAD/CN=Dummy device':
Unable to locally verify the issuer's authority.
WARNING: certificate common name `' doesn't match requested host name `'.
Proxy request sent, awaiting response... 500 Server Error
2013-12-18 17:23:01 ERROR 500: Server Error.

However, when the request has a certificate that its CA doesn't match the server CA, I get 200 OK from Internet Explorer and no 403 Forbidden. When doing so from wget I am getting the failed: Service Unavailable to establish SSL connection.

[root@ilnwadv56 ~]# wget --save-headers --no-check-certificate --certificate=/sapmnt/accad/other/client.crt --private-key=/sapmnt/accad/other/client.key HTTPs://
--2013-12-18 17:46:17--
Resolving ilnwadv62...
Connecting to ilnwadv62||:18080... connected.
Proxy tunneling failed: Service UnavailableUnable to establish SSL connection.

Does anyone have an idea where is my mistake? Thanks in advance.

share|improve this question
Pretty well-written and sane question, +1 from me. However, could you improve it just that last little bit by including an example of getting a 200 OK when using an obviously unsigned certificate, as you say you do in your last substantive para? – MadHatter Dec 18 '13 at 15:30
Hi @MadHatter, I have edited the message. Please, let me know if I am missing any detail. I am more than happy to give further explanations. :D – bshuster13 Dec 18 '13 at 16:00
Thanks for the edit. Everything in your question refers to the service on port 1443, except that last wget edit, which uses straight 443. I'm beginning to think there's some confusion in your question. Could you overhaul it into a format where you tell us what you're trying to achieve, what you do, and what you expect to see, then show us what you actually do, and point out how it's different? – MadHatter Dec 18 '13 at 16:01
up vote 0 down vote accepted

OK, first of all, thanks for everyone, who has tried to help (especially to @MadHatter). The problem was that I have used a proxy so I had to unset https_proxy and the problem got resolved.

Right now, it works correctly. When sending a dummy certificate (by not giving any certificate through wget)

wget --save-headers --no-check-certificate HTTPS://
--2013-12-22 10:37:02--
Connecting to||:1443... connected.
OpenSSL: error:1409442F:SSL routines:SSL3_READ_BYTES:tlsv1 alert insufficient security
Unable to establish SSL connection.

When giving a correct certificate.

wget --save-headers --certificate=/sapmnt/accad/other/ --private-key=/sapmnt/accad/other/ --no-check-certificate HTTPS://
--2013-12-22 10:33:59--
Connecting to||:1443... connected.
WARNING: cannot verify's certificate, issued by /C=IL/ST=Central District/L=Raanana/O=SAP AG/OU=AccAD/CN=AccAD CA/emailAddress=test@test.test:
Unable to locally verify the issuer's authority.
HTTP request sent, awaiting response... 200 OK
Length: 4598 (4.5K) [text/html]
Saving to: `index.html'

100%[======================================>] 4,598       --.-K/s   in 0s      

2013-12-22 10:33:59 (38.5 MB/s) - `index.html' saved [4598/4598]

Thanks! :D

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.