Are wildcard DNS records bad?
TL;DR: wildcard DNS is good for wildcard services, but it’s bad practice to use wildcard DNS for static services because any errors are harder to diagnose.
How can I get a free wildcard certificate?
Go to Websites & Domains, find the domain you want to secure, and click Let’s Encrypt. Select the “Issue wildcard certificate” checkbox and select the domain aliases you also want to secure (if any). Click Install (or Renew if the domain is already secured with a Let’s Encrypt certificate).
Is it bad practice to use wildcard DNS record?
Using wildcard DNS record is bad practice only if you don’t actually serve wildcard service. In addition, some ancient programs may have greater change to fail DNS query. Other answers have already provided lots of examples where you try to mix wildcard domain with static names and there’re potential pitfalls for those cases.
What are the security concerns of wildcard certificates?
Like compromising a web server, gaining access to a wildcard certificate’s private key provides an attacker with the ability to impersonate any domain that is using a wildcard certificate (*.example.com). When cyber-criminals compromised DigiNotar back in 2011, the attackers were able to steal a Google wildcard certificate (*.google.com).
Why are wildcard domain names a bad idea?
Wildcard domains might seem like a good idea but set up wrongly they can cause all sorts of issues. This is really a bad idea, suppose if you want to host one subdomain a.company.com in one web server, and b.company.com in another web server, may be another ISP.
Can a bad actor use a wildcard certificate?
The security industry has also at times spotted vulnerabilities that could allow bad actors to spoof SSL servers via wildcard certificates. A simpler option than compromising a CA is to trick a CA into issuing a wildcard certificate for a fictitious company.