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Questions tagged [certificates]

Questions about signed certificates and the processes involved (Creation, signing, accepting, viewing)

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Openssl keeps prompting for a phrase during key generation

I am following the directions that are published on the Ubuntu site. First, it asks you to create a secure key, then it tells you to enter openssl rsa -in server.key -out server.key.insecure to create ...
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34 views

How to enroll Endless OS Certificate in Ubuntu 18.04 using mokutil?

I am now dual booting Ubuntu 18.04 and Endless OS using the solution provided in this thread on ask ubuntu. But I had to disable secure boot to boot Endless OS. I posted about this on Endless OS ...
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0answers
12 views

Apache2 restart returns bad message

I have 2 certificates that I'm trying to deploy onto my 2 of my apache https website. Whenever i try to restart the service with sudo service apache2 restart. It prompt for my pass phrase of both my ...
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30 views

Add Cert / “Security Exception” to Thunderbird 60

I have to tell my Thunderbird 60 every. single. time. that I am happy with confirming the security exceptions (our corporation cert, that is), both for IMAP receiving and SMTP sending. After that ...
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0answers
45 views

How to install user PFX certificate

I need to install a PFX certificate into some analog of personal certificates store in Windows. Does a personal certificate store exist in Ubuntu? If it does, how can I install the PFX certificate ...
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69 views

CertBot Installation: Could not connect to ppa.launchpad.net:80 (91.189.95.83)

I'm trying to install CertBot to issue a let's encrypt certificate for a domain but on my Ubuntu Server 16.04 I get errors when I run sudo apt install python-certbot-apache I get the following ...
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23 views

Broke ca-certificates on 18.04

During an update to Ubuntu 18.04 something went wrong and now I do now seem to have working certificates anymore. I tried to solve this by running sudo apt-get install --reinstall ca-certificates. But ...
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16 views

SHA 1 with RSA for ssl certificate [closed]

I using SHA 1 with RSA encryption for ssl certificate is secure? As i know, sha 1 is not secure, but if we use RSA with sha1, still it will be an issue? Please suggest if any security issues exist.
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81 views

Add all Firefox Certificates to Ubuntu 18.04 trust store

What is the best way to add all common used Intermediate Certificates in Ubuntu 18.04+, and keep them up2date with apt? I mean typical intermediate certs signed from Digicert, Comodo, etc. It seems ...
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42 views

can I export VPN certificate from OSX to Ubuntu?

I have configuration file for VPN that works on OSX with Tunnelblick. As far as I understand, the same VPN certificate can be used from different machines. So I copied the configuration file the *....
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172 views

wget fails by a certificate problem

Same problem of wget interrupted by a certificate problem: After do-release-upgrade from 16.04 to 18.01 Failed to connect to https://changelogs.ubuntu.com/meta-release-lts. Check your Internet ...
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1answer
205 views

CA root install issue on Ubuntu 16.04 LTS Server

I am setting up nginx reverse proxy on Ubuntu 16.04 LTS Server for Web-Server. There will three different Services running on Ubuntu. Services will communicate each other using API calls. Similarly ...
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31 views

How to bypass gnome nextcloud integration tls error

Whenever I set up nextcloud integration on ubuntu 18.04 the nextcloud folder shows an error Invalid TLS Certificate when I click on it. Is there any way to fix this without the admin adding a ...
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381 views

Wifi connection: CA certificate and system-connections file

My problem is closely related to this question. Unfortunately the answer given there is not an anwer at all: it says "do that and that" but it doesn't say what it is supposed to happen after the ...
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22 views

Is it feasible to sign Deb package using a cert issued by Trusted CA or signing with a GPG Key Pair Signed by a Trusted CA

I am trying to sign our custom deb install packages so that the end users can verify the signature before installing it. Using GPG Key pair generated locally and used for signing, requires the end ...
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2answers
668 views

Can't install docker, ca problems with curl

I am trying install docker from there instructions: https://linuxconfig.org/how-to-install-docker-on-ubuntu-18-04-bionic-beaver I am running the command: $ sudo curl -fsSL https://download.docker....
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1answer
35 views

how to revoke x.509 certificates?

I recently accepted some x.509 certificates on my Ubuntu 16.04 because of open-connect and I wonder how can I delete or revoke them on my system. My problem is I have no idea what were the details of ...
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36 views

DocumentRoot pointing to wrong directory Ubuntu Server 16.04.3 [duplicate]

I have just created a new VM using Ubuntu Server 16.04.3. First i created a new directory: sudo mkdir /var/www/domain.com/html Then i created a file: sudo nano /var/www/domain.com/html/index.php ...
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1answer
237 views

wget interrupted by a certificate problem

I wanted to download a file using wget https://curl.haxx.se/download/archeology/curl-7.16.2.tar.gz. Done that from a friend's PC and got no errors. However, when trying to do so from my PC, on which ...
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19 views

Unable to generate certificate

I'm trying to generate a certificate for a certain server following this lab, but the command that generates a CRT file out of the CSR doesn't seem to work. See the image below The command is unable ...
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0answers
13 views

ASCII-Cordiet PEM-CErtificate

how can i convert my .pem certificate in ascii-code ? I downloaded the ascii to text app and copy pasted the .pem (text) which was changed to hexadecimal. When i try to upload the ascii in ...
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1answer
120 views

installing a wildcard Certificate on a subdomain running on ubuntu

i have tried for a full day in vain to install a wildcard Certificate on owncloud (which is a subdomain and running on obuntu 16.04 with apache2) Any one who can help me here with concrete steps? ...
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1answer
1k views

Ubuntu 18.04 certificate validation failure

On a (relatively) fresh installation of Ubuntu 18.04, I'm experiencing failures related to certificate validation. First the Dropbox installer could not download the binary client. I also notice that ...
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0answers
783 views

Messed-up with ca-certificates/ How to restore back to default

Recently I tried to add own ssl for https support in localhost which I couldn't achieve but now i am getting all these error with certificates With command git push fatal: unable to access 'https://...
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2answers
471 views

Adding a certificate to Ubuntu

I am having with an App that is not serving the intermediate certificate to the clients. As a workaround I wanted to add the intermediate certificate (Let's Encrypt X3) to the ca-certificates and ...
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530 views

SSL certificate error with curl

Reciently I started to having trouble using curl with SSL (it gives cert error). Packages are up to date. Tried doing "update-ca-certificates --fresh" without success. # curl https://github.com/ curl:...
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224 views

ERR_SSL_VERSION_INTERFERENCE error when using fiddler with mono on ubuntu

I'm trying to intercept network requests using fiddler on Ubuntu 17.10 and mono 4.6.2. As per instructions given here I've also imported certificates by running command mozroots --import --sync. But ...
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1answer
317 views

Set company certificate as Trusted

My company gave me a file company_CA.crt that I need to use to access one of our customers website. When I tried to add it on macOS, all I had to do was to click on the file, and then after imported, ...
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38 views

Certificate on server

I have installed Mahara (Eportfolio system) on Ubuntu 16.04. I need to install a ssl certificate to allow outside access to Mahara. Can anyone advise on the best way to manage the certificate? Is ...
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0answers
30 views

Unable to install certbot on Ubuntu 16 [duplicate]

According to these instructions for Ubuntu 16, I'm doing this: sudo apt-get update sudo apt-get install software-properties-common sudo add-apt-repository ppa:certbot/certbot sudo apt-get update ...
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0answers
119 views

Issue with SSL certificates, unable to install Java or add PPA repo

I just get a new Ubuntu virtual machine (14.04) from Here and one of the first things I tried to do was to install the JDK 8, starting to add the PPA repo: sudo add-apt-repository -y ppa:webupd8team/...
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24 views

Certificates for eid-viewer not found in ubuntustudio 16.04

I am running ubuntustudio 16.04 LTS I have a Digipass VASCO DP905 E1.1. card-reader. I could use it to see my ID and log in on websites. In autumn 2017, I realised it didn’t work anymore. When I ...
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0answers
31 views

How do I request a CA+local certificate from CA?

I have a CA server, and I've already got one machine with CA+local certificates from said CA. However, I don't know how to do the same for my Ubuntu machine. I can use openssl req -out CSR.csr -new -...
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42 views

CA Cert Issues with Curl in Ubuntu 14.04.1

Recently email from a Keystone JS app stopped sending transactional email using Mailgun. Mailgun says: "This may be possibly due to our SSL certification renewal, which was updated on Jan 22, 2018. ...
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1answer
4k views

importing root CA certificate in linux

Maybe this is a duplicate, but i cannot find the answer. Windows CA authorities provide their root certificates in several forms: The certificate by itself and full chain, each can be downloaded in 2 ...
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0answers
49 views

How do I manage the ssl certs (pem/key) for vsftpd?

I am working on setting up my first ftp and I am using the ssl certs that were built in and I am wondering if I can find/create personalized certs. How would this affect me and will making a different ...
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0answers
208 views

Unable to load Ubuntu on Toshiba Laptop

Error: 16.0944491 problem loading UEFI:db X.509 certificate (-65) This error message occurred while trying to load Ubuntu on a Toshiba laptop. What does it mean?
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386 views

SSL connection to an ubuntu server

I just set up an ubuntu server on a VPS to learn some SSL stuff. I tried to connect to it using openssl using the command: openssl s_client -connect xxx.xxx.xxx.xxx:443 and it just returns: connect:...
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380 views

Install Eclipse Oxygen on Ubuntu 16.04 Certificate Problem

I tried to install Eclipse Oxygen using the Oomph installer contained in the download. However during the installation process it asks whether i trust two certificates. When I clicked on details it ...
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0answers
537 views

Import a certificate in Evolution mail client

How do I import a certificate? The help file is very confusing. I want to be able to encrypt some of my emails. Managing S/MIME certificates Certificates allow you to communicate with others ...
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0answers
242 views

OpenSSL certificate problem

I have a problem when an Android app tries to connect. Background: The company that I work with, developed an app. When I tried in a web browser I see the certificate, but in the app, I couldn't even ...
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1answer
1k views

viewer for X.509 certificate

Previously X.509 certificates would open properly. I do not know what changed but currently they are opening as text files and shown in gedit. How can I revert to the original behaviour? Edit: I was ...
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0answers
20 views

Can't get my SSL get to work on Apache2 [duplicate]

default-ssl.conf: <IfModule mod_ssl.c> <VirtualHost _default_:443> ServerAdmin webmaster@localhost ServerName www.server.at ServerAlias server.at ...
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0answers
316 views

Nginx reverse proxy for Apache: does Apache need SSL certificates?

I'm setting up Nginx as a reverse proxy for Apache2, in order to run a webmail service and a WordPress site in a secure environment. Does Apache need to know about the SSL certificates, or is it ...
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1answer
714 views

Apache2 - SSH - LetsEncrypt SSL - Certbot - Proxy - Manual Setup: How to achieve this?

I have a website running successfully on Apache port 80 HTTP (on a temporary subdomain). I am following this tutorial in order to setup an SSL certificate on Apache2, Ubuntu using LetsEncrypt with ...
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1answer
224 views

Caldav (and carddav) compatible client with support for TLS Client certificate authentication

I am in search of a Caldav (and carddav) compatible client with support for TLS Client certificate authentication? The solution with Thunderbird + Lightning + SoGO connector I suggested in my answer ...
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1answer
63 views

Combining Certs Together? Ubuntu 16.04?

Is there anyway I can combine certificates together? I went to my Universities IT Help Desk about not being able to connect to their WPA2 Enterprise Wifi and they handed me 4 Certs Intermediate 1.crt,...
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1answer
362 views

local nginx https server send error certificates: mediarouter.home

I set up a website server on my system via nginx, When I visit my site remotely, everything goes right, but when I visit this site locally(via write domain name in /etc/hosts), nginx will send wrong ...
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1answer
202 views

Which certificate do I add to the trusted store in order to add my device certificate to the trusted store?

I am troubleshooting an issue with my VPN client which lists the troubleshooting steps at https://kb.pulsesecure.net/articles/Pulse_Secure_Article/KB40200. These instructions just use an ambiguous ...
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0answers
84 views

Franz messaging app - untrusted CA

I've recently moved from Mint to Ubuntu and encountered a problem. I'm using Franz to manage my multiple messenger accounts. One of them is my employer's Rocket Chat. At first Rocket Chat didn't ...