Error 21 Unable To Verify The First Certificate
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Center (ISC) shift, Firefox 3.6.3 (the latest available version) displayed a digital certificate error when accessing the ISC ssl error unable to verify the first certificate login page through SSL/TLS: https://isc.sans.org/myisc.html. I confirmed this on a couple ssl error unable to verify the first certificate gmail of Firefox instances running on Mac OS X and Windows XP. We also got a few verify return code 21 unable to verify the first certificate reports from ISC readers on the same issue, although other people running the same browser version, and even language (EN), on the same OS platforms, didn't get
Unable To Verify The First Certificate Nodejs
any error message. Finally, the reason was a new ISC digital certificate had been recently installed, and the required intermediate certificate was missing in some web browsers. As a result, the browser couldn't validate the full digital certificate chain to ensure you were really connecting to the website you intended to connect to. This unable to verify the first certificate npm is a common scenario on security incidents, where Man-in-the-Middle (MitM) attacks or direct web server breaches modify the SSL/TLS certificate offered to the victim, and when accidentally accepted, the attacker can intercept and modify the "secure" HTTPS channel. As you may find yourself dealing with a similar situation in the future... how can you (as I did) check what is the real reason behind the SSL/TLS certificate validation error? By manually verifying the SSL/TLS certificate trust chain, or certificate hierarchy, through openssl. The goal is to manually follow all the validation steps that are commonly performed it an automatic way by the web browser. Step 1: Check the certificate validation error and download the controversial digital certificate. $ openssl s_client -connect isc.sans.org:443 depth=0 /C=US/postalCode=20814/ST=Maryland/L=Bethesda/streetAddress=Suite 205/streetAddress=8120 Woodmont Ave/O=The SANS Institute/OU=Network Operations Center (NOC)/OU=Comodo Unified Communications/CN=isc.sans.org verify error:num=20:unable to get local issuer certificate verify return:1 depth=0 /C=US/postalCode=20814/ST=Maryland/L=Bethesda/streetAddress=Suite 205/streetAddress=8120 Woodmont Ave/O=The SANS Institute/OU=Network Operations Center (NOC)/OU=Comodo Unified Communications/CN=isc.sans.org verify error:num=27:certificate not trusted verify return
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Unable To Verify The First Certificate Openssl
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Unable To Get Local Issuer Certificate
or posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question and answer site for system and http://blog.taddong.com/2010/04/manual-verification-of-ssltls.html network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Unable to verify the first certificate (RapidSSL/GeoTrust/Ubuntu) up vote 3 down vote favorite 2 Have been trying to get Ubuntu http://serverfault.com/questions/509113/unable-to-verify-the-first-certificate-rapidssl-geotrust-ubuntu to recognize the GeoTrust SAN certificate, no luck. Browsers work fine. Help? $ openssl s_client -showcerts -connect artsyapi.com:443 CONNECTED(00000003) depth=0 businessCategory = Private Organization, 1.3.6.1.4.1.311.60.2.1.3 = US, 1.3.6.1.4.1.311.60.2.1.2 = Delaware, serialNumber = 4660944, C = US, ST = New York, L = New York, O = Artsy Inc., CN = artsy.net verify error:num=20:unable to get local issuer certificate verify return:1 depth=0 businessCategory = Private Organization, 1.3.6.1.4.1.311.60.2.1.3 = US, 1.3.6.1.4.1.311.60.2.1.2 = Delaware, serialNumber = 4660944, C = US, ST = New York, L = New York, O = Artsy Inc., CN = artsy.net verify error:num=27:certificate not trusted verify return:1 depth=0 businessCategory = Private Organization, 1.3.6.1.4.1.311.60.2.1.3 = US, 1.3.6.1.4.1.311.60.2.1.2 = Delaware, serialNumber = 4660944, C = US, ST = New York, L = New York, O = Artsy Inc., CN = artsy.net verify error:num=21:unable to verify the first certificate verify return:1 --- Certificate chain 0 s:/businessCategory=Private Organization/1.3.6.1.4.1.311.60.2.1.3=US/1.3.6.1.4.1.311.60.2.1.2=Delaware/serialNumber=4660944/C=US/ST=New York/L=New York/O=Artsy Inc./CN=artsy.net i:/C=US/O=GeoTrust Inc/OU=See www.geotrust.com/resources/cps (c)06/CN=GeoTrust Extended Validation SSL CA -----BEGIN CERTIFICATE----- MIIFfDCCBGSgAwIBAgICUFIwDQYJKoZIhvcNAQEFBQAwgYUxCzAJBgNVBAYTAlVT MRUwEwYDVQQKEwxHZW9UcnVzdCBJbmMxMTAvBgNVBAsTKFNlZSB3d3cuZ2Vv