SSL Certificate error: verify error:num=20:unable to get local issuer certificate

Posted by Brian on Server Fault See other posts from Server Fault or by Brian
Published on 2011-01-21T22:24:24Z Indexed on 2012/09/02 3:40 UTC
Read the original article Hit count: 1255

Filed under:

ssl

|

openssl

I've been trying to get an SSL connection to an LDAPS server (Active Directory) to work, but keep having problems. I tried using this:

openssl s_client -connect the.server.edu:3269

With the following result:

verify error:num=20:unable to get local issuer certificate

I thought, OK, well server's an old production server a few years old. Maybe the CA isn't present. I then pulled the certificate from the output into a pem file and tried:

openssl s_client -CAfile mycert.pem -connect the.server.edu:3269

And that didn't work either.

What am I missing? Shouldn't that ALWAYS work?

© Server Fault or respective owner

Related posts about ssl

Plesk SSL Certificate (Default cert when SSL enabled, CORRECT cert when SSL is disabled)

as seen on Server Fault - Search for 'Server Fault'
I'm running Plesk 8.6.0: I have an SSL cert installed through Plesk's admin interface. But I have a bit of an issue: When I enabled SSL for the site, and selected my cert, then restart httpd, Plesk defaults to using my self-signed default certificate. Conversely, when I disable SSL support for the… >>> More
apache renew ssl not working [on hold]

as seen on Server Fault - Search for 'Server Fault'
Downloaded a new ssl cert from go daddy and installed the cert on apache2 server put the cert in /etc/ssl/certs/ folder put the gd_bundle.crt in the /etc/ssl/ folder private key is in /etc/ssl/private/private.key I just replaced the original files with the new files, did not replace the private… >>> More
Cant connect to mysql using self signed SSL certificate

as seen on Server Fault - Search for 'Server Fault'
After creating a self-signed SSL certificate, I have configured my remote mysqld to use them (and ssl is enabled) I ssh into my remote server, and try connecting to its own mysqld using ssl (mysql server is 5.5.25).. ~> mysql -u <user> -p --ssl=1 --ssl-cert=client.cert --ssl-key=client… >>> More
How to log invalid client SSL certificate in SSL

as seen on Server Fault - Search for 'Server Fault'
I have a IIS web site which requires client certificate. I have turned off CRL checking. The client is unable to access the web site - he gets 403.17 (certificate expired) error. I would like to log the certificate he is using, becaue I think he is using the wrong certificate. Is there a way to… >>> More
Mixing SSL and non-SSL content in an Apache2 virtual host

as seen on Server Fault - Search for 'Server Fault'
I have a (hopefully) common scenario for one of my sites that I just can't seem to figure out how to deploy correctly. I have the following site and directories for example.com: These need to require SSL: /var/www/example.com/admin /var/www/example.com/order These need to be non-SSL: /var/www/example… >>> More

Related posts about openssl

Redhat | Openssl installation error

as seen on Server Fault - Search for 'Server Fault'
make -f objs/Makefile make[1]: Entering directory `/root/fuse-ssh/nginx-0.7.65' cd /usr/bin/openssl \ && make clean \ && ./config --prefix=/usr/bin/openssl/.openssl no-shared no-threads \ && make \ && make install /bin/sh: line 0: cd:… >>> More
Redhat | Openssl installation error

as seen on Stack Overflow - Search for 'Stack Overflow'
make -f objs/Makefile make[1]: Entering directory `/root/fuse-ssh/nginx-0.7.65' cd /usr/bin/openssl \ && make clean \ && ./config --prefix=/usr/bin/openssl/.openssl no-shared no-threads \ && make \ && make install /bin/sh: line 0: cd:… >>> More
Upgrade OpenSSL 0.9.8k to OpenSSL 1.0.1c on Ubuntu 10.04

as seen on Server Fault - Search for 'Server Fault'
We're currently using Ubuntu 10.04 and based on the PCI Compliance results, we're told to upgrade our OpenSSL. I attempted to do this using this reference: http://sandilands.info/sgordon/upgrade-latest-version-openssl-on-ubuntu and http://www.lunarforums.com/dedicated_web_hosting_at_lunarpages/upgrading_openssl-t35015… >>> More
Installing OpenSSL that supports SNI along with previous version of OpenSSL

as seen on Server Fault - Search for 'Server Fault'
So I learned that to host multiple HTTPS websites on the same IP address you need an OpenSSL version that supports SNI (0.9.8f and higher). My RHEL5 box currently has 0.9.8e and Apache version httpd-2.2.26-2.el5. According to a same question here it's not a good idea to replace the original version… >>> More
Solaris X86 AESNI OpenSSL Engine

as seen on Oracle Blogs - Search for 'Oracle Blogs'
Solaris X86 AESNI OpenSSL Engine Cryptography is a major component of secure e-commerce. Since cryptography is compute intensive and adds a significant load to applications, such as SSL web servers (https), crypto performance is an important factor. Providing accelerated crypto hardware greatly… >>> More