How do I create a self-signed SSL certificate?


Ubuntu, even the minimal flavour, comes with the ssl cert package pre installed, which means you don t need to do anything. The files you re looking for are already on your system etc ssl certs ssl cert snakeoil.pem etc ssl private ssl cert snakeoil.key. Advanced If for some reason you need to create a . Soon after it was published, Ross McKay made a very interesting comment on that article If you have a few servers you need to do this with, you can just create yourself a CA Certifying Authority certificate and load that instead. Then your self signed certs, signed by your CA cert, will all be accepted without .It can also be used to generate self signed certificates which can be used for testing purposes or internal usage. The first step is to create your RSA One unfortunate side effect of the pass phrased private key is that Apache will ask for the pass phrase each time the web server is started. Obviously this is not necessarily .I m looking for a way to generate self...

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I've set up SSL on my webserver, now I need two files:

a certificate a certificate Key

How do I create a self-signed certificate for testing purposes?

Ubuntu, even the 'minimal' flavour, comes with the ssl-cert package pre-installed, which means you don't need to do anything.

The files you're looking for are already on your system:

/etc/ssl/certs/ssl-cert-snakeoil.pem /etc/ssl/private/ssl-cert-snakeoil.key


If for some reason you need to create a fresh certificate, you can run

sudo make-ssl-cert generate-default-snakeoil --force-overwrite

If you want to change the expiration date of you certificate, you can manipulate the make-ssl-cert script at /usr/sbin/make-ssl-cert. Around like 124 there's a line similar to this:

openssl req -config $TMPFILE -new -x509 -nodes \

Where you can change the expiration date by adding the -days argument:

openssl req -config $TMPFILE -new -days 365 -x509 -nodes \


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I'd like to use TLS encryption with Virtual Machine Remote Control (VMRC) for Microsoft Virtual Server 2005 SP1.

Virtual Server doesn't allow you to upload an arbitrary self-signed certificate; it generates a certificate signing request (CSR) that then needs to be signed by a Certificate Authority (CA).

I don't have a Windows Certificate Authority, and can't install it because I don't have access to Windows Server.

Can I use a self-signed CA certificate (generated with either MakeCert or OpenSSL) to sign the certificate signing request (CSR) that Virtual Server generates?

If so, how do I do this (using either MakeCert or OpenSSL)? I've only ever used MakeCert and OpenSSL to create signed certificates from scratch, not to sign...

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I'm trying to create a self-signed wildcard SSL certificate for use on a number of development and test servers running IIS 6. Following various guides has led to a couple ways of generating the certificates, but I haven't had any luck getting it to work. The most successful ways I've had were following this OpenSSL guide and using makecert.exe like so:

makecert.exe -r -b 01/01/2009 -e 01/01/2042 -sr LocalMachine -ss MY -a sha1 -n CN="*" -sky exchange -pe -eku -sy 12 -sp "Microsoft RSA SChannel Cryptographic Provider" wildcard.cer

Both of which generate certificates that IIS 6 will accept, but when I actually try to view the site I get the following error in firefox:

Data Transfer Interrupted

The connection to was interrupted while the page was loading.

IE just gives:

Internet Explorer cannot display the webpage

Most likely causes:

You are not connected to the Internet. The website is...
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Typically, Secure Socket Layer (SSL) Certificates are created for domains by first generating a Certificate Signing Request (CSR) through Internet Information Services (IIS), sending the request to a known Certification Authority, such as GeoTrust, which generates a corresponding Certificate file for use in conjunction with the CSR, completing the request and securing communications on the domain.

However, IIS does come with the ability to create a ‘self-signed’ certificate, in which the server generating the CSR also generates the corresponding Certificate file. These are mainly used for testing, development and troubleshooting, as the certificate will only be recognized as valid by the server it is hosted on. Attempting to view the secured domain externally would receive an error that the certificate is not valid, as it has not been approved nor is recognized by a known Certification Authority.

Step 1

To create a self-signed SSL certificate for any hosted...

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SSL Overview

As you're likely aware, being able to send data securely over a network (especially a public network) is of growing importance. To that end, many web applicates employ the use of SSL certificates to encrypt traffic between a client (often your web browser) and a server (someone's http server).

If you're interested on learning more about SSL certificates and the various mechanisms (such as "key certificates", "root certificates", "intermediate certificates" and more), jump to about ~51:45 of this edition of Tech Snap.

I really recommend watching that portion of that video. Seriously.

Using SSL in Your Application

In production, you will have to purchase an SSL certificate. When you purchase an SSL certificate, you are paying for a recognized and trusted-third parties (root or intermediate authority) to say that your SSL certificate is both valid and legitimately used by its owners. See how PayPal's SSL certificate was verified by...

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An SSL certificate is an electronic ‘document’ that is used to bind together a public security key and a website’s identity information (such as name, location, etc.) by means of a digital signature. The ‘document’ is issued by a certificate provider such as GlobalSign, Verisign, GoDaddy, Comodo, Thawte, and others. For more information, visit the article: What is an SSL Certificate?

In most cases you’ll usually want to use a browser trusted SSL certificate, so a self-signed may not be what you need. In those cases you should buy an SSL from a provider, or get yourself setup with a LetsEncrypt SSL. However, there are times when you just need the SSL for the security provides your connection. In these cases you can generate a self-signed SSL to secure the connection, the only caveat being that you’ll have to accept an SSL warning when you load.

Generating a Self-Signed SSL on Ubuntu

Pre-Flight Check

These instructions are intended for creating a self-signed...
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Self-signed ssl certificates can be used to set up temporary ssl servers. You can use it for test and development servers where security is not a big concern. Use the form below to generate a self-signed ssl certificate and key.

About SSL Certificates

SSL certificates are required in order to run web sites using the HTTPS protocol. For professional web sites, you usually buy such a certificate from Verisign, Thawte or any other ssl certificate vendor. SSL certificates use a chain of trust, where each certificate is signed (trusted) by a higher, more credible certificate. At the top of the chain of trust are the root certificates, owned by Verisign and others. These certificates are typically shipped with your operating system or web browser.

In Internet Explorer and Firefox

When you visit a web site over HTTPS, your web browser will receive the ssl certificate for the web site. It will examine the contents of the certificate to see that is indeed valid...

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As part of a series on migrating a website to support HTTPS everywhere I needed to create a self-signed certificate on Mac OS X. It’s pretty easy. Here is what you need to do:

Create a host key Create a certificate request Create the SSL certificate For apache, create a nopass host key

To get started, we will create a new folder called ssl in our /etc/apache2 folder.

$ cd /private/etc/apache2 $ sudo mkdir ssl $ cd ssl

Create Host Key

$ sudo ssh-keygen -f

You should get a message: Generating public/private rsa key pair., and then you will be asked to provide a passcode for the host key. You can choose anything for the passcode, or leave it blank.

Create Certificate Request

Using the host key you created, create the certificate request file. Note that I am using as the file naming convention. I recommend that you use something similar based on your website address.

$ sudo openssl req -new -key...
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