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Questions tagged [certificates]

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

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Unable to locate package python3-cepces

I'm trying to enroll Ubuntu 22.04.4 Pro Desktop for certificates from a Windows domain (ADCS). Using this approach with certmonger and its cepces plugin. I have a virtual machine installed from the ...
McLayn's user avatar
  • 123
0 votes
0 answers
49 views

How to limit the scope of an authorized user in an SSH principals file using a FQDN?

I've been using the SSH AuthorizedPrincipalsFile feature for quite some time and it works fine, but I've discovered recently that it is possible to limit the provenance of a user using the "from=&...
jean-christophe manciot's user avatar
0 votes
0 answers
97 views

Force docker build to not verify TLS certs (WSL)

Running docker in WSL2 ubuntu image. I want to disable TLS verification for my docker build for testing purposes. How can I accomplish this? I tried the following: Adjust /etc/docker/dameon.json, ...
Dave's user avatar
  • 203
0 votes
1 answer
81 views

Booted to a tty1 screen in Ubuntu KDE after autoremoving ca-certificates

I was having a problem when updating Ubuntu. Certificate verification failed, so I searched on the internet. Then by my own logic and some answers on some forum. I ran the following command: sudo apt ...
Tony Prajapati's user avatar
0 votes
0 answers
107 views

How to use external USB CAC Card reader and CAC with Chrome browser on Ubuntu 23.10

This is a howto of how I did it, So not really a question per se. How to use a CAC reader, CAC card and Google Chrome browser on Ubuntu 23.10 Linux. What worked for me. Leave the CAC card reader ...
Ralph Crongeyer's user avatar
1 vote
1 answer
148 views

Help trusting self-signed certificates

I'm trying to learn how to get Ubuntu to trust self-signed certificates. I'm using the site https://badssl.com/ (specifically, https://self-signed.badssl.com). Exporting the certificate through Chrome....
ziggibyte's user avatar
0 votes
0 answers
26 views

Is x.509 bypass a security risk?

I have an embedded system that is communicating with a server using SSL over WiFi to a router and then to the internet. I have what I've been told is the proper certificate for the server installed ...
Dave's user avatar
  • 1
0 votes
1 answer
74 views

issues with school CA certificates in terminal

I've been having issues with pulling requests and accessing sites in terminal. gives me the certificate signed by unknown authority error. I have followed guides to install the certificate system-wide,...
60Five's user avatar
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0 answers
46 views

I am trying to setup a a reverse proxy with SSL and Apache2

I have installed an SSL certificate from No ip. When I try and restart Apache2, I receive this error: AH02572: Failed to configure at least one certificate and key for reverse-proxy.internal.cloudapp....
austenskinner's user avatar
0 votes
0 answers
145 views

Web browsers can't find my certificates on Ubuntu 22.04

I've tried the following applications: Firefox (Snap) Vivaldi (DEB) Edge (Flatpak) I put the root and immediate certificate crt files in /usr/local/share/ca-certificates/, and ran update-ca-...
YamiYukiSenpai's user avatar
0 votes
1 answer
137 views

How to get WLAN / WiFi certificate in Ubuntu 22.04

On other operating systems when i connect to the company wifi network it asks me to accept a certificate. On ubuntu 22.04 network settings pop up with the possibility to choose a certificate from a ...
Thorsten Niehues's user avatar
0 votes
1 answer
74 views

Cannot successfully import new PKCS12 certificate into Evolution Mail

Similar to this one, Failing to import new PKCS12 certificate into Evolution Mail but i'm on ubuntu 20.04 with evolution client version 3.36.5-0ubuntu1 and i get a different error when running ...
adowdy's user avatar
  • 239
1 vote
0 answers
388 views

Make certificate compulsory for RDP into Ubuntu machine along with username password combination

I am setting up RDP connection in Ubuntu and trying to access it from another machine (Windows/Mac, via Microsoft's Remote Desktop Connection). The setup is fine and works properly with username and ...
NedStarkOfWinterfell's user avatar
0 votes
1 answer
62 views

About ubuntu browser certificate pem

On an Ubuntu machine with Firefox installed, we have a certificate file stored in a local directory. We want new users who log in to automatically have this certificate installed in their Firefox ...
Anynomous Person's user avatar
1 vote
0 answers
97 views

Chrome browser losing certificate on startup linux

Every time I restart Linux, I lose the certificate of the project that I installed through the Chrome browser. What should I do to save this permanently, without losing it? The certificate was ...
Ivan Ferrer's user avatar
0 votes
1 answer
151 views

.cer certificate

I'm trying to import a certificate for my school network that ends in .cer, and ubuntu seems happy to read the data, but the import button is greyed out. I've seem similar questions, but none seem to ...
Rory MacPhee's user avatar
0 votes
0 answers
353 views

cURL reporting self-signed cert is not valid

I am trying to use some tools to manage various devices, and found that I can no longer connect to anything running a webserver. Some troubleshooting later found cURL kicking this error. curl: (60) ...
Moridn's user avatar
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0 votes
0 answers
159 views

Password verification failed when setting up VPN tunnel

I'm trying to follow instructions in the "Setting Up the VPN Tunnel" section of this webpage to setup VPN connection. I built OpenVPN version 2.6.8 (most up-to-date) from source and make ...
zzzhhh's user avatar
  • 51
0 votes
1 answer
701 views

Certificate error trying to attach Ubuntu Pro token

I am trying to enable Ubuntu Pro (free subscription) on a virtual machine with Ubuntu 20.04.6 LTS. When I run the command sudo pro attach <My token>, I got the error message: Failed to connect ...
Emiliano's user avatar
0 votes
1 answer
196 views

which package file for ca-certificates do I download? [duplicate]

i have a very old server, hosted at Digital Ocean, running Ubuntu 16.04.5 LTS (Xenial Xerus), but no time to migrate to a new one. when I try apt-get updates, it shows the error CAfile: /etc/ssl/...
hard-of-lurnin's user avatar
0 votes
0 answers
456 views

Installing SSL Certificate on Nginx now website is not accessible

I'm having a heck of a time getting Ubuntu 22.04, Nginx and Certbot to play nicely together. I'm a newb when it comes to Ubuntu so I'm learning my way with trial and error, though I seem to be getting ...
ErocM's user avatar
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0 answers
452 views

Which CA Certificate to use when installing Ubuntu 22.04 from a USB?

I made a bootable USB drive today on Windows, and I am in the process of installing Ubuntu 22.04 on a Windows desktop. One of the first steps in the Ubuntu installation setup is to connect the ...
Christopher Miller's user avatar
0 votes
0 answers
85 views

Installing digital certificate on Ubuntu Chromium

I'm using Linux Ubuntu 20.04 with Chromium Version 115.0.5790.170 (Official Build) snap (64-bit). I need to use this digital certificate (it's called idCAT for people in Catalonia), but I've never ...
Jocelyne Sze's user avatar
1 vote
0 answers
92 views

Proper usage of Digital Signature (DSC) fields nf PDF documents

I'm researching and wanting to use digital signature for my future documents. My Windows installation came with Nitro PDF that I use to build a PDF form with 3 signature fields. I could also set a ...
aeowlian's user avatar
1 vote
1 answer
120 views

Where does Remmina store fingerprints/thumbprints of the RDP connections to remote machines?

I couldn't find where Remmina stores fingerprints/thumbprints of the RDP connections to remote machines. I've tried: $HOME/.config/remmina/ $HOME/.local/share/remmina $HOME/.ssh Searching the web... ...
crysman's user avatar
  • 508
0 votes
0 answers
572 views

CA Certificates on Ubuntu Pro 20.04 Image are not recognized when trying to installing tools like terraform, docker, etc on the image

For our Scale Sets, I use the Ubuntu Pro 20.04 image as our base image. On this base image I intend to install all find of software deployment tools including docker, terraform, kubernetes, helm, ...
Petria3s's user avatar
0 votes
1 answer
465 views

Can I force a specific user to login by SSH cert only while all other accounts can still SSH by password?

Ubuntu wizards, I'm trying to set a user to only be able to login via cert through SSH but allow all other users to login via password through SSH. For some reason, I'm not getting how to set this ...
Zack Perry's user avatar
0 votes
1 answer
249 views

Enable TLS tracing / logging in Firefox Snap 115

I am trying to diagnose some TLS bug/feature in Firefox (snap), specifically about mutual authentication while using HTTP/3. Getting it to print some useful data has been challenging for some time. I ...
anx's user avatar
  • 2,378
1 vote
1 answer
493 views

Fresh 22.04 install. SSL errors when trying to download files

New to Ubuntu but have some RHEL experience. On a fresh 22.04 install attempting to pull a file using: php -r "copy('https://somesite.com/file.txt', 'mylocalfile.txt');" I get the ...
Steve's user avatar
  • 11
0 votes
0 answers
337 views

Cannot find "Gandi" intermediate certificate on my Ubuntu server, where is it?

I have installed a certificate on my webserver into /etc/ssl/certs/. My certificate is signed by Gandi Standard SSL CA 2 which is signed by USERTrust RSA Certification Authority. The USERTrust RSA ...
SebMa's user avatar
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0 votes
0 answers
20 views

What are all the certificates mandatory to be provide while setting TLSVerifyClient option to demand?

In my case, I had set TLSVerifyClient to demand. I couldn't be able to establish a connection While providing TLSCACertificateFile alone. While setting the TLSVerifyClient option demand is it ...
ram ajay's user avatar
0 votes
0 answers
576 views

Charles proxy certificate, import button unactive

I have encountered a problem with importing the Charles proxy certificate into the system. When trying to do it from the GUI, the 'Import' button is greyed out, and it displays the message 'Cannot ...
ne.dmtro's user avatar
0 votes
1 answer
223 views

How can I use self-signed HTTPS for my Ubuntu 20.04 autoinstall files?

I am trying to load an autoinstall config into an Ubuntu installation. I have my autoinstall configs hosted on two servers, one running https with company certs and one running http. When the ...
CatEnthusiast's user avatar
2 votes
1 answer
190 views

I need to get my schools ca certificate onto my computer

I have the CA certificate on my mac book but I need to send it to my ubuntu laptop so I can access school wifi. How would I go about it?
Idk What I'm doing's user avatar
0 votes
1 answer
2k views

Proper way to install mitmproxy's certificates?

I run a a few servers, 2 of which have mitmproxy correctly installed. I follow the same process as the other 2 servers on an identical 3rd server, but mitmproxy does not work. I get a TLS error every ...
Adactyl's user avatar
0 votes
1 answer
696 views

Where is stored the Certificate when the first Remmina connection was accomplished?

For Ubuntu Desktop 22.04 and when Remmina (1.4.25+dfsg) as client does the first attempt of connection to a remote host (in this case other Ubuntu Desktop 22.04 too), once written the valid username ...
Manuel Jordan's user avatar
2 votes
1 answer
2k views

Unable to use apt in WSL Ubuntu due to security issues

I'm trying to install make on a WSL instance in my Windows machine. So I tried the following command: sudo apt install make After entering my credentials, and pressing enter, I got the following ...
user32882's user avatar
  • 191
0 votes
0 answers
155 views

How can I create a certificate for my new domain?

I'm trying to change my domain in my raspberry as it was configured for an old domain with an old certificate The problem is that when I try to run the installer or make anything I only find this ...
kuhi's user avatar
  • 101
0 votes
0 answers
2k views

can't initialize iptables table `filter': Table does not exist (do you need to insmod?) - iptables is not present

I am trying to install NGINX and Certificate by following this enter link description here in WSL But at the Step 5: Allow Nginx Traffic, I am getting error after the command sudo ufw allow 'nginx ...
Nishal's user avatar
  • 1
0 votes
1 answer
615 views

Resolving the API Certificate Verification Failure in Python

I am running several applications that use Python. No matter which application is used (and even if I execute the script directly within Python itself), certificate verification always fails, with ...
001121100's user avatar
0 votes
0 answers
3k views

Python3 [SSL: CERTIFICATE_VERIFY_FAILED] Unable to get local issuer certificate

Encountering below error when attempting to run a program: Traceback (most recent call last): File "/usr/local/lib/python3.11/urllib/request.py", line 1348, in do_open h.request(...
001121100's user avatar
4 votes
1 answer
2k views

Problem with Certbot after Ubuntu upgrade to 22.04

I have a problem with Certbot after upgrading to Ubuntu 22.04. I tried to reinstall Certbot without success. Then I tried to install Certbot with snap, and I have the same problem: certbot --version ...
Kaziu's user avatar
  • 43
1 vote
1 answer
2k views

unable to connect on citrix workspace on ubuntu 22.04

i am not finding the step-8 in Firefox and whenever i am opening ica file , its not redirecting to citrix site just opening in the terminal. I have tried all the steps- step-1 http://mark911.wordpress....
Tasmir Sahu's user avatar
1 vote
1 answer
275 views

Automatic download of intermediate certificates

I receive s/mime signed email. Signature for this email is generated with certificate that is issued from this authority: Sectigo RSA Client Authentication and Secure Email CA expiration 01.01.2031 ...
Alex's user avatar
  • 318
0 votes
1 answer
251 views

Security Certs for multiple domains in postfix

In postfix when configuring for multiple domains do I need the following lines in /etc/postfix/main.cf for each domain or something else? I already have certs for the domains in question from ...
amd.64's user avatar
  • 38
0 votes
1 answer
136 views

openssl configuration issue caused failure during certification by canaonical server

I have an openssl problem as below: # pro --help Failed to access URL: https://contracts.canonical.com/v1/resources?architecture=amd64&kernel=5.15.0-52-generic&series=jammy Cannot verify ...
jake's user avatar
  • 51
0 votes
0 answers
2k views

Cannot update ca-certificates - ln: failed to create symbolic link '/etc/ssl/certs/.pem' -> '': No such file or directory

Searching the forums I have found many links related to softlinks, but nothing related to the issue that I am facing. I have tried to run the the following command. apt upgrade -- I am looking to run ...
lslamp's user avatar
  • 1
1 vote
0 answers
3k views

Ubuntu certbot Unable to find a virtual host listening on port 80

I've created a config file for site in /etc/apache2/sites-available/, enabled it and restarted apache. sudo apache2ctl configtest shows Syntax OK. When I execute sudo certbot --apache - I cannot see ...
Regular User's user avatar
0 votes
1 answer
1k views

Certificate errors when accessing any server

I recently installed a Ubuntu 22.04 as a Hyper-V VM, but whenever I try to compile code, go on the internet etc, I run into errors like NET::ERR_CERT_AUTHORITY_INVALID or The remote certificate is ...
h607732's user avatar
0 votes
0 answers
177 views

Testing application with self signed cert - works with ubuntu 20.04 but not 18.04

Using the below conf file to generate a self signed cert for testing purposes. I added the generated cert and pem as a tls certificate in the ingress and everything works perfectly with ubuntu 20.04 ...
bjamin's user avatar
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