43 questions
Can I use a hogehoge.com certificate without a hostname when I use SSL with SNI?You are currently registered in two domains.1. domain1.com2. www.domain2.comAt this time, www.domain2.com recognizes suc...
I am building a kubernetes environment with microk8s on a physical server.In order to build a docker registry pod in the environment and pull and deploy a custom image directly into Kubernetes, it was...
I don't know where to downgrade the key due to the FREAK attack.It seems that the public key is going to be downgraded, but Q1.Is it a server-only attack with a weak public key in advance because the ...
Currently, Debian is considering transferring to Let's Encrypt due to the price increase of RapidSSL WildCard (10,000 yen → 20,000 yen).The CentOS on the VPS worked fine, and I was able to make it wor...
I am sending a request to an api of https (language is node and I use request module) I received a request from the server operator to add the root certificate because I updated the SSL server certifi...
CentOS7+Apache/2.4.6 is set to be accessible via http2.I am referring to it here.https://blog.apar.jp/linux/5200/Although Apache and SSL have been configured, the http2 module has not been successfull...
I am currently trying to develop a simple client browser using python. Is there any way I can do this with python?I would appreciate it if you could let me know the Python library I use.1. You can ren...
About 3 months ago, I added https://hstspreload.appspot.com/ to the HSTS Preload list, but I want to remove it from the list because some subdomains no longer have access from Chrome.(Non-Chrome brows...
I have a question.Do you know what smtpd_tls_wrappermode means in Postfix?If you read the document (described later), the SMTPS and smtpd_tls_wrappermode on port 465 are It doesn't seem to matter, but...
How do I view the communications of proprietary applications installed on my PC?When I looked at this communication using Wireshark, I found that the communication with the server was encrypted with S...
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