![Python requests: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate Load 7 more related questions Show fewer related questions 0. 2007 hummer h3 transmission problems](/img/512x512/161670570203.webp)
I agree with above answers, do the following. 1- Remove your cli and install latest cli. 2- check the certificate exist: C:\Program Files\Amazon\AWSCLIV2\botocore\cacert.pem. 3- if it doesn't exist remove the cli and go to: C:\Program Files\ and remove Amazon.The issue with a self-signed cert is you must trust it, even if it's the a not the correct/safe approach. The correct/safe method is to avoid using a self-signed cert and use one issued by a trusted authority. A slightly less bad idea than that might be to import the self-signed cert into Python's list of trusted certificates, wherever that is.ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1056) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "<my_install_location>\Python\lib\site-packages\requests\adapters.py", line 449, in sendAdd a comment. 3. This worked for me: Extract the google-cloud-sdk.zip that the installer downloads. Open up google-cloud-sdk\lib\third_party\requests\session.py. Change the line "self.verify = True" to "self.verify = False". Run the install.bat in the root if the directory you extracted to. Profit. Share.SSL: CERTIFICATE_VERIFY_FAILED certificate verify failed: self-signed certificate in certificate chain (_ssl.c:1129) [duplicate] Ask Question Asked 1 month agossl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:997) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\Users\tntel\stable-diffusion-webui\modules\call_queue.py", line 56, in fSSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1045) I believe there is another library in use, that doesn't rely on certifi? But I don't have any idea on where and how to add my root certificate, so all iPython requests will work. Any ideas are appreciated.Self-signed certificates are certificates signed by a CA that does not appears in the OS bundle. Most of the time it's an internal site signed by an internal CA. In this case you must ask the ops for the cacert.pem cert and cacert.key key.Git - "SSL certificate issue: self signed certificate in certificate chain" 1 How to fix 'GitHub.Services.OAuth.VssOAuthTokenRequestException' on a self-hosted runner for GitHub ActionsGit - "SSL certificate issue: self signed certificate in certificate chain" 1 How to fix 'GitHub.Services.OAuth.VssOAuthTokenRequestException' on a self-hosted runner for GitHub ActionsOne simple approach to reduce such errors is to add the URL as a trusted host. It will allow the installation of Python, ignoring the SSL certificate check. Here is an example of how to add the trusted host to the URL, $ pip install –trusted-host pypi.org \. –trusted-host files.pythonhosted.org \.The certificate of the firewall was untrusted/unknown from within my wsl setup. I solved the problem by exporting the firewall certificate from the windows certmanager (certmgr.msc). The certificate was located at "Trusted Root Certification Authorities\Certifiactes" Export the certificate as a DER coded x.509 and save it under e.g. "D:\eset.cer".When you see "Verify return code: 19 (self signed certificate in certificate chain)", then, either the servers is really trying to use a self-signed certificate (which a client is never going to be able to verify), or OpenSSL hasn't got access to the necessary root but the server is trying to provide it itself (which it shouldn't do because it ...ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1056) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "<my_install_location>\Python\lib\site-packages\requests\adapters.py", line 449, in sendrequests.get ('https://website.lo', verify=False) Fore completeness, the relevant verify parameter is described in requests.request () docs: verify -- (optional) Either a boolean, in which case it controls whether we verify the server's TLS certificate, or a string, in which case it must be a path to a CA bundle to use. Defaults to True.To trust only the exact certificate being used by the server, download it and instead of setting verify=False, set verify="/path/to/cert.pem", where cert.pem is the server certificate. the error even says "self signed certificate", so most likely your assumption is correct.From requests documentation on SSL verification: Requests can verify SSL certificates for HTTPS requests, just like a web browser. To check a host’s SSL certificate, you can use the verify argument: >>> requests.get ('https://kennethreitz.com', verify=True) If you don't want to verify your SSL certificate, make verify=False.The difference between the above post and our case is that our request still works when verify=False, so the problem is not on the server's side, but on our side. And so, we try the above answer And so, we try the above answerOld post. But answering for my future self and anyone else who gets stuck at this! First locate the pip.conf(linux): [root@localhost ~]# pip3 config -v list For variant 'global', will try loading '/etc/xdg/pip/pip.conf' For variant 'global', will try loading '/etc/pip.conf' For variant 'user', will try loading '/root/.pip/pip.conf' For variant 'user', will try loading '/root/.config/pip/pip ...1 git config --global http.sslVerify false Resolution - Configure Git to trust self signed certificate To make more accurate fix to the problem "SSL certificate problem: self signed certificate in certificate chain" we need to - Get the self signed certificate Put/save it into - **~/git-certs/cert.pem**Typically the certificate chain consists of 3 parties. A root certificate authority; One or more intermediate certificate authority; The server certificate, which is asking for the certificate to be signed. The delegation of responsibility is: Root CA signs → intermediate CA. Intermediate CA signs → server certificate1 git config --global http.sslVerify false Resolution - Configure Git to trust self signed certificate To make more accurate fix to the problem "SSL certificate problem: self signed certificate in certificate chain" we need to - Get the self signed certificate Put/save it into - **~/git-certs/cert.pem**Apr 3, 2023 · This can occur if the certificate is self-signed, or if it is signed by an untrusted certificate authority. Solution. Configure Git to trust the self-signed certificate globally: You can configure Git to trust the self-signed certificate globally by adding an 'http.sslCAInfo' setting to your Git configuration file. Here's an example of how to ... We're using a self-signed certificate, hence [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1129). Does poetry not have a way around that?Self-signed certificates System services ... Account email verification Make new users confirm email Runners Proxying assets CI/CD variables Token overviewMay 30, 2019 · openssl s_client -showcerts -servername security.stackexchange.com -connect security.stackexchange.com:443 CONNECTED (00000004) depth=2 O = Digital Signature Trust Co., CN = DST Root CA X3 verify return:1 depth=1 C = US, O = Let's Encrypt, CN = Let's Encrypt Authority X3 verify return:1 depth=0 CN = *.stackexchange.com verify return:1 --- "ConnectError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1129)" I am using the following code: `from googletrans import Translator, constants from pprint import pprint trans=Translator() translation=trans.translate(column_list,dest='en')` Here is the detailed error:This can occur if the certificate is self-signed, or if it is signed by an untrusted certificate authority. Solution. Configure Git to trust the self-signed certificate globally: You can configure Git to trust the self-signed certificate globally by adding an 'http.sslCAInfo' setting to your Git configuration file. Here's an example of how to ...Add a comment. 8. Running just the below two commands, fixed the issue for me. "C:\Program Files (x86)\Microsoft SDKs\Azure\CLI2\python" -m pip install --upgrade pip "C:\Program Files (x86)\Microsoft SDKs\Azure\CLI2\Scripts\pip" install python-certifi-win32. In my case the issue was seen due to invoking a Azure CLI command behind a company ...I was playing with some web frameworks for Python, when I tried to use the framework aiohhtp with this code (taken from the documentation): import aiohttp import asyncio #*****...Hello. I know this query is not itself a pypi security issue but I’been trying to solve this problem by reading differents answers but none of them turn out to be “the solution”,so I would try to breafly explain my situation so you guys can give me a clue. The thing is that when I try to run pip install it start with this warnings and ends with an Error: WARNING: Retrying (Retry(total=4 ...self.host="KibanaProxy" self.Port="443" self.user="test" self.password="test" I need to suppress certificate validation. It works with curl when using option -k on command line.Typically the certificate chain consists of 3 parties. A root certificate authority; One or more intermediate certificate authority; The server certificate, which is asking for the certificate to be signed. The delegation of responsibility is: Root CA signs → intermediate CA. Intermediate CA signs → server certificateWe are moving a live site to a new server. I am following the instructions from Certbot - Ubuntufocal Apache. Currently the domain is pointing to the old server ip; I am using a host file entry for now. While a short amount of down time is acceptable, since the process is effectively failing at the first step I really want to get this resolved before we do the move. It is required that we have ...Technically, any website owner can create their own server certificate, and such certificates are called self-signed certificates. However, browsers do not consider self-signed certificates to be as trustworthy as SSL certificates issued by a certificate authority. Related: 2 Ways to Create self signed certificate with Openssl CommandIt turns out the first computer only tests through a verification depth of 2, whereas the second computer tests to a verification depth of 3, resulting in the following: depth=3 C = US, O = "The Go Daddy Group, Inc.", OU = Go Daddy Class 2 Certification Authority verify error:num=19:self-signed certificate in certificate chain verify return:1 ...I was playing with some web frameworks for Python, when I tried to use the framework aiohhtp with this code (taken from the documentation): import aiohttp import asyncio #*****...1 Answer. Sorted by: 8. Most of the time clearing cache and ignoring ssl during webdriver-manager update would solve the problem. npm cache clean webdriver-manager update --ignore_ssl. In my case I resolved by updating webdriver manage locally in the project and starting standalone server.On XP SP2 or higher, # you may need to selectively disable the # Windows firewall for the TAP adapter. # Non-Windows systems usually don't need this. ;dev-node MyTap # SSL/TLS root certificate (ca), certificate # (cert), and private key (key). Each client # and the server must have their own cert and # key file.Self-signed certificates are certificates signed by a CA that does not appears in the OS bundle. Most of the time it's an internal site signed by an internal CA. In this case you must ask the ops for the cacert.pem cert and cacert.key key.ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1056) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "<my_install_location>\Python\lib\site-packages\requests\adapters.py", line 449, in send"ConnectError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1129)" I am using the following code: `from googletrans import Translator, constants from pprint import pprint trans=Translator() translation=trans.translate(column_list,dest='en')` Here is the detailed error:Self-signed certificates System services ... Account email verification Make new users confirm email Runners Proxying assets CI/CD variables Token overview1 Answer. I doubt whether it's a ssl cert. problem. Try running. [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581) Then it's a ssl cert problem. Otherwise try these steps -. Delete the .terraform directory Place the access_key and secret_key under the backend block. like below given code. Run terraform init backend "s3 ...SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed Following these questions: SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed; OmniAuth & Facebook: certificate verify failed; Seems the solution is either to fix ca_path or to set VERIFY_NONE for SSL.Exception: URL fetch failure on AWS_URL: None -- [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833) I fixed my problem by upgrading the certificate as: pip install --upgrade certifiopenssl s_client -showcerts -connect www.google.com:443 CONNECTED(00000003) depth=3 DC = com, DC = forestroot, CN = SHA256RootCA verify error:num=19:self signed certificate in certificate chain --- Certificate chain 0 s:/C=US/ST=California/L=Mountain View/O=Google LLC/CN=www.google.com i:/CN=ssl-decrypt -----BEGIN CERTIFICATE ...I was playing with some web frameworks for Python, when I tried to use the framework aiohhtp with this code (taken from the documentation): import aiohttp import asyncio #*****...Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about TeamsDownloaded the root SSL certificate of my organization from an HTTPS website, saved it as a .crt file in the following path: "C:\Users\youruser.certificates\certificate.crt", and then used the "conda --set ssl_verify True" and "conda config --set ssl_verify .crt" commands.At work, Windows 10 environment, using Cmder console emulator. --trusted-host used to resolve the "'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain" issue. Today it stopped working.Create a certificate signing request using the server key to send to the fake CA for identity verification. $ openssl req -new -key server.key -out server-cert-request.csr -sha256. Give the organization a name like "Localhost MQTT Broker Inc." and the common name should be localhost or the exact domain you use to connect to the mqtt broker.Click on the lock next to the url. Navigate to where you can see the certificates and open the certificates. Download the PEM CERT chain. Put the .PEM file somewhere you script can access it and try verify=r"path\to\pem_chain.pem" within your requests call. r = requests.get (url, verify='\path\to\public_key.pem') Share.Downloaded the root SSL certificate of my organization from an HTTPS website, saved it as a .crt file in the following path: "C:\Users\youruser.certificates\certificate.crt", and then used the "conda --set ssl_verify True" and "conda config --set ssl_verify .crt" commands.You have a certificate which is self-signed, so it's non-trusted by default, that's why OpenSSL complains. This warning is actually a good thing, because this scenario might also rise due to a man-in-the-middle attack.Typically the certificate chain consists of 3 parties. A root certificate authority; One or more intermediate certificate authority; The server certificate, which is asking for the certificate to be signed. The delegation of responsibility is: Root CA signs → intermediate CA. Intermediate CA signs → server certificate"ConnectError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1129)" I am using the following code: `from googletrans import Translator, constants from pprint import pprint trans=Translator() translation=trans.translate(column_list,dest='en')` Here is the detailed error:Self-signed certificates are certificates signed by a CA that does not appears in the OS bundle. Most of the time it's an internal site signed by an internal CA. In this case you must ask the ops for the cacert.pem cert and cacert.key key.Jun 3, 2021 · "certificate verify failed: self signed certificate in certificate chain" OR "certificate verify failed: unable to get local issuer certificate" This might be caused either by server configuration or Python configuration. In this article, we assume you use a self-signed CA certificate in z/OSMF. I was playing with some web frameworks for Python, when I tried to use the framework aiohhtp with this code (taken from the documentation): import aiohttp import asyncio #*****...This is bad advice. Essentially, you silently turn off all security when accessing the internet, opening the app to all imaginable attack vectors. If you MUST trust a self-signed certificate and can not install it on the device, you should be selective and ONLY accept this one self-signed token. –ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1056) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "<my_install_location>\Python\lib\site-packages\requests\adapters.py", line 449, in send1 Answer. Sorted by: 8. Most of the time clearing cache and ignoring ssl during webdriver-manager update would solve the problem. npm cache clean webdriver-manager update --ignore_ssl. In my case I resolved by updating webdriver manage locally in the project and starting standalone server.We are moving a live site to a new server. I am following the instructions from Certbot - Ubuntufocal Apache. Currently the domain is pointing to the old server ip; I am using a host file entry for now. While a short amount of down time is acceptable, since the process is effectively failing at the first step I really want to get this resolved before we do the move. It is required that we have ...Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about Teamsssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1056) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "<my_install_location>\Python\lib\site-packages\requests\adapters.py", line 449, in send1 Answer. Sorted by: 8. Most of the time clearing cache and ignoring ssl during webdriver-manager update would solve the problem. npm cache clean webdriver-manager update --ignore_ssl. In my case I resolved by updating webdriver manage locally in the project and starting standalone server.hello when I run chiang I get the following problem [ ERROR] --- Failed to send events over telegram: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1129) (notify_manager...."ConnectError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1129)" I am using the following code: `from googletrans import Translator, constants from pprint import pprint trans=Translator() translation=trans.translate(column_list,dest='en')` Here is the detailed error:For Production, A certificate chain must be added to server configuration which allows your app can access server through api requests. For Development, you can proceed in 2ways. With Self Signed certificate which fails in your case. There must be something wrong with certificate; Without Self Signed certificate a.1 Answer. Sorted by: 8. Most of the time clearing cache and ignoring ssl during webdriver-manager update would solve the problem. npm cache clean webdriver-manager update --ignore_ssl. In my case I resolved by updating webdriver manage locally in the project and starting standalone server.This server's certificate chain is incomplete. Grade capped to B. This means that the server is not sending the full certificate chain as is needed to verify the certificate. This means you need to add the missing certificates yourself when validating.openssl s_client -showcerts -servername security.stackexchange.com -connect security.stackexchange.com:443 CONNECTED (00000004) depth=2 O = Digital Signature Trust Co., CN = DST Root CA X3 verify return:1 depth=1 C = US, O = Let's Encrypt, CN = Let's Encrypt Authority X3 verify return:1 depth=0 CN = *.stackexchange.com verify return:1 ---This server's certificate chain is incomplete. Grade capped to B. This means that the server is not sending the full certificate chain as is needed to verify the certificate. This means you need to add the missing certificates yourself when validating.This is bad advice. Essentially, you silently turn off all security when accessing the internet, opening the app to all imaginable attack vectors. If you MUST trust a self-signed certificate and can not install it on the device, you should be selective and ONLY accept this one self-signed token. –For Production, A certificate chain must be added to server configuration which allows your app can access server through api requests. For Development, you can proceed in 2ways. With Self Signed certificate which fails in your case. There must be something wrong with certificate; Without Self Signed certificate a.well, if it a self signed one, it won't work. Dart does not allow self signed certificates. One solution (a bad one imho) is to allow certificates, even invalid ones, but it removes the core principle of using certificates. –To check if you site has a valid certificate run: curl https://target.web.site/ If you get a message "SSL certificate problem: self signed certificate" you have a self signed certificate on your target. If you get a proper answer from the site then the certificate is valid.From requests documentation on SSL verification: Requests can verify SSL certificates for HTTPS requests, just like a web browser. To check a host’s SSL certificate, you can use the verify argument: >>> requests.get ('https://kennethreitz.com', verify=True) If you don't want to verify your SSL certificate, make verify=False.Jun 17, 2021 at 18:05. 1. First step is to be able download anythink using apk. Second step (the step you are asking) is to download ca-certificates tool and then add CA standard way with calling update-ca-certificates. First step is more or less hack.The docs are actually incorrect, you have to set SSL to verify_none because TLS happens automatically. From Heroku support: "Our data infrastructure uses self-signed certificates so certificates can be cycled regularly... you need to set the verify_mode configuration variable to OpenSSL::SSL::VERIFY_NONE"Hello. I know this query is not itself a pypi security issue but I’been trying to solve this problem by reading differents answers but none of them turn out to be “the solution”,so I would try to breafly explain my situation so you guys can give me a clue. The thing is that when I try to run pip install it start with this warnings and ends with an Error: WARNING: Retrying (Retry(total=4 ...Mar 27, 2020 · 13 I found my way to this post while Googling. In my case, the error message I received was: SSL validation failed for https://ec2.us-west-2.amazonaws.com/ [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1091) ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1056) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "<my_install_location>\Python\lib\site-packages\requests\adapters.py", line 449, in sendYou have a certificate which is self-signed, so it's non-trusted by default, that's why OpenSSL complains. This warning is actually a good thing, because this scenario might also rise due to a man-in-the-middle attack.I'm not sure what you are asking. It is the certificate which got retrieved by your code. What certificate this is exactly depends on the URL accessed in your code, i.e. it is usually the certificate provided by the final server.We're using a self-signed certificate, hence [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1129). Does poetry not have a way around that?
We reran the security scan and it detected this error: The X.509 certificate chain for this service is not signed by a recognized certificate authority. If the remote host is a public host in production, this nullifies the use of SSL as anyone could establish a man-in-the-middle attack against the remote host.. 21 00 utc 5 to est
Create a certificate signing request using the server key to send to the fake CA for identity verification. $ openssl req -new -key server.key -out server-cert-request.csr -sha256. Give the organization a name like "Localhost MQTT Broker Inc." and the common name should be localhost or the exact domain you use to connect to the mqtt broker.Scenario 1 - Git Clone - Unable to clone remote repository: SSL certificate problem: self signed certificate in certificate chain. Scenario 2 - Vagrant Up - SSL certificate problem: self signed certificate in certificate chain. Scenario 3 - Node.js - npm ERR!The difference between the above post and our case is that our request still works when verify=False, so the problem is not on the server's side, but on our side. And so, we try the above answer And so, we try the above answerClick on the lock next to the url. Navigate to where you can see the certificates and open the certificates. Download the PEM CERT chain. Put the .PEM file somewhere you script can access it and try verify=r"path\to\pem_chain.pem" within your requests call. r = requests.get (url, verify='\path\to\public_key.pem') Share.3. From your code: cert_reqs=ssl.CERT_REQUIRED, ca_certs=None. From the documentation of wrap_socket: If the value of this parameter is not CERT_NONE, then the ca_certs parameter must point to a file of CA certificates. Essentially you are asking in your code to validate the certificate from the server ( CERT_REQUIRED) but specify at the same ...One simple approach to reduce such errors is to add the URL as a trusted host. It will allow the installation of Python, ignoring the SSL certificate check. Here is an example of how to add the trusted host to the URL, $ pip install –trusted-host pypi.org \. –trusted-host files.pythonhosted.org \.Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate (_ssl.c:1129)')) Ask Question Asked 10 months agoIt is probably because either root.cert or inter.cer or both doesn't have 'CA:TRUE' in 'x509 Basic Constraints'. You can read the both root and intermediate cert and check for the extension: openssl x509 -in root.cer -noout -text. And, look for the following, it must be set for the verification to work. X509v3 Basic Constraints: CA:TRUE. Share.Self-signed certificates are certificates signed by a CA that does not appears in the OS bundle. Most of the time it's an internal site signed by an internal CA. In this case you must ask the ops for the cacert.pem cert and cacert.key key.8. You can do turn the verification off by adding below method: def on_start (self): """ on_start is called when a Locust start before any task is scheduled """ self.client.verify = False. Share.Exception: URL fetch failure on AWS_URL: None -- [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:833) I fixed my problem by upgrading the certificate as: pip install --upgrade certifiOf course. This is a simple example that I copied from one of the tutorials. import pandas as pd import openai import certifi certifi.where() import requests openai.api_key = 'MY_API_KEY' response = openai.Completion.create( model="text-davinci-003", prompt="I am a highly intelligent question answering bot.If your MongoDB deployment uses SSL, you must also specify the --host option. mongo verifies that the hostname of the mongod or mongos to which you are connecting matches the CN or SAN of the mongod or mongos‘s --sslPEMKeyFile certificate. If the hostname does not match the CN/SAN, mongo will fail to connect.It turns out the first computer only tests through a verification depth of 2, whereas the second computer tests to a verification depth of 3, resulting in the following: depth=3 C = US, O = "The Go Daddy Group, Inc.", OU = Go Daddy Class 2 Certification Authority verify error:num=19:self-signed certificate in certificate chain verify return:1 ...requests.get ('https://website.lo', verify=False) Fore completeness, the relevant verify parameter is described in requests.request () docs: verify -- (optional) Either a boolean, in which case it controls whether we verify the server's TLS certificate, or a string, in which case it must be a path to a CA bundle to use. Defaults to True.In our case the issue was related to SSL certificates signed by own CA Root & Intermediate certificates. The solution was - after finding out the location of the certifi's cacert.pem file (import certifi; certifi.where()) - was to append the own CA Root & Intermediates to the cacert.pem file.self.host="KibanaProxy" self.Port="443" self.user="test" self.password="test" I need to suppress certificate validation. It works with curl when using option -k on command line.You have a certificate which is self-signed, so it's non-trusted by default, that's why OpenSSL complains. This warning is actually a good thing, because this scenario might also rise due to a man-in-the-middle attack..