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I own a domain at my DNS provider. I've pointed it to my house. My house keeps the IP address at the domain updated through dynamic DNS, so the A record always points to my IP address. I run OpenVPN at my house so I can connect from elsewhere. It's using a self-signed certificate. So, of course, I get SSL warnings when I connect.
My question is, Can I obtain an SSL certificate from StartSSL (free), set it up on OpenVPN, and get my browser to recognize the certificate as valid? For that matter, can I get any SSL certifcate to validate for any personal, development site I might set up at home in this situation? (OpenVPN.example.com, TestSite.example.com, etc)
(OpenVPN is not using port 443 or port 80, because I've heard that ISPs don't like it when you use those...)
The short answer is Yes. When creating a SSL certificate request you set the "common name" to the DNS name of the host. You can change the type of DNS record (e.g. A, CNAME, etc.) or record value (e.g. 192.168.1.2) at anytime as long as the record name (e.g. vpn.example.com) is the same.
For a browser to recognize a SSL certificate (not give warnings upon connection) a matching Certificate Authority (CA) must ship (or be manually added) to your browser or OS. To avoid SSL warnings with self-signed certificates you could instead provision a cert using a local/custom CA and install its root certificate on any necessary computers.
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Closed 3 years ago.
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If the SSL is all about encryption and public-private key, why we have multiple type of certificates(like regular and wildcard)?
Is there any third-party server in process of paid-certificates handshake?
The origin of the certificate does not matter for the TLS handshake itself. For the verification of the certificate it is only relevant if the issuing certificate agency is included in the applications or systems trust store. There are CA like Let's Encrypt which issue certificates for free and which are included in most systems trust store.
For the various types of certificates (wildcard etc) same can be said, i.e. it does not matter if this certificate was issued by a paid CA or not.
EV certificates are a bit different. These were historically considered special since the validation of the certificate owner was more tough and not everybody could get one. They were also more expensive due to this process. And only some CA would be able to issue such certificate and these CA where marked as such in the browsers But the relevance of these EV certificates is going down and some browsers already don't show them as special anymore.
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Closed 3 years ago.
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Due to a vulnerability in a WAF system we are required to rotate our SSL certificate on our website. we have to update the SSL certificate in several places.
My question, if I renew the SSL certificate from the CA and take time to deploy it on various servers. will this issue cause any outage on the site.
some of the places where I need to deploy:
WAF
Cloudfront
Nginx
As long as the old certificate is still valid (i.e. not expired and not revoked) it will continue to work so you can take some time to roll out the new certificate you've got. You can also run a mixed setup where some installations have the new certificate while others still have the old one.
While your specific use case is unknown it might be that due to the vulnerability the private key of the previous certificate was compromised which should (hopefully) lead to a quick revocation by the certificate. In this case you have to roll out the new certificates as fast as possible since due to the revocation clients might not accept the old certificate any longer.
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Closed 4 years ago.
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We have a SSL cert from Symantec for foo.bar.com. Now we want our site to be know as foo.baz.com while still maintaining the old name. Both bar.com and baz.com resolve to the same IP. If I go to foo.baz.com it says the site is not secure. How I can use the same cert for both domain names when they are the same IP?
You have already purchased SSL certificate for foo.ar.com but not for foo.baz.com that's why it says 'site is not secure'.
Symantec SSL certificates are giving support for SAN (Subject Alternative Names) so you can manage multi domain names with single Symantec SSL certificate so add you domain name foo.baz.com in existing SSL certificate.
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Closed 7 years ago.
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I will buy a sll certificate and I will put on my server, what will happen except the transition from http to https?
If I will use openssl to secure connections instead of ssl certificate?
I will buy a sll certificate and I will put on my server, what will happen except the transition from http to https?
There's more to it than that, the server also needs to start serving on port 443 and ssl support needs to be turned on.
If I will use openssl to secure connections instead of ssl certificate?
They're not alternatives to each other. You need both a ssl certificate and an ssl library.
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Closed 8 years ago.
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I have a commercial SSL Certificate for my website, say https://www.xyz.com
The SSL is configured in apache-vhosts.config (Apache virtual host port 443)
I am planning to introduce sub-domains like:
http://apples.xyz.com
http://oranges.xyz.com
http://mangoes.xyz.com
These will all be configured as Virtual Hosts in Apache Config.
Question:
Do i need to buy separate SSL Certificates for each of these sub-domains, or will my existing commercial SSL Certificate work?
This depends on the type of SSL certificate you purchased. If you bought a wildcard SSL certificate, or one that explicitly has subdomains in it, you're probably good to go. If you bought a cert that only has www.xyz.com defined, then you're not going to be able to use the same cert for the different subdomains.
If you bought for only the www subdomain, then depending on your server topology, you could either buy a cert for each subdomain, and use different IP for each subdomain (or if you don't care about older browsers, use Server Name Indication).
My recommendation if you bought a single domain SSL cert, and you're going to have many subdomains, just to bite the bullet and buy a wildcard certificate.