Solved

How can i access webmail without certificate error?

Posted on 2014-04-23
11
2,777 Views
Last Modified: 2014-04-29
When i access my webmail, i receive a message "There is a problem with this website’s security certificate." I click on "Continue to this website (not recommended). " to proceed. How can i access webmail without the certificate error.
Security-certificate.JPG
0
Comment
Question by:christoforatos1968
  • 6
  • 5
11 Comments
 
LVL 10

Expert Comment

by:JEaston
ID: 40017472
I assume your server is using a self-signed certificate.  Therefore it is not trusted by any computer outside your domain.

You have two options if you want to prevent the error message:
1. Buy a Certificate from a Trusted Certificate Authority and set this up on your server
2. Install the Self-Signed Certificate into your computers Trusted Certificates

Obviously number 2 would require you doing this for every computer that connects (or giving staff instructions on how to do this)
0
 

Author Comment

by:christoforatos1968
ID: 40017504
I prefer option 2. How can i do this?
0
 
LVL 10

Expert Comment

by:JEaston
ID: 40017536
Microsoft TechNet has a step by step guide at:  Installing a Self-Signed Certificate as a Trusted Root CA in Windows Vista

This guide is for Vista, but it is similar for other Windows Versions.
0
Is Your AD Toolbox Looking More Like a Toybox?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

 

Author Comment

by:christoforatos1968
ID: 40017573
I do not have "Local Computer" in "Trusted Root Certification Authorities". The options that i have are "Registry" and "Smart Card'.
0
 
LVL 10

Expert Comment

by:JEaston
ID: 40017592
Do you have administrative rights on your local computer?
0
 

Author Comment

by:christoforatos1968
ID: 40018241
I followed the steps from Technet and i am still not able to access web mail without the certificate error. You can view my screenshots. Maybe i am missing something. I am also using Windows 8.1 .
1.JPG
2.JPG
3.JPG
4.JPG
5.JPG
6.JPG
7.JPG
8.JPG
0
 
LVL 10

Expert Comment

by:JEaston
ID: 40019481
The certificate appears to be issued to yourdomain.lan

Is this the address you are accessing it from?  If your accessing it from over the internet I assume it is not.  Therefore the certificate should include 'Subject Alternate Name' for the different addresses the site can be accessed on.

If it only contains the .lan address and you are using a different address it will cause an error.
0
 

Author Comment

by:christoforatos1968
ID: 40028860
From the server "Certificate Authority" i downloaded the certificate. The date shown on the certificate is "Valid from 11/10/2013 to 29/8/1902. From the browser the certificate error shows "Valid from 11/10/2013 to 9/10/2023". Could this be the reason why i receive the message on web page " Continue to the website (not recommended)."
Server-certificate.JPG
Internet-Explorer-certificate.JPG
0
 
LVL 10

Expert Comment

by:JEaston
ID: 40029112
These appear to be two different certificates.  One is a self-signed certificate for your CA, the other is a certificate issued by the CA for skygreece.xxxx

The dates being different is therefore not a concern - they are separate certificates.  However, the fact the CA cert is already expired is a concern.

Effectively if the CA certificate has expired then the computer will not trust it.  Therefore any certificates issued by this server also cannot be trusted.  I think you need to reissue/renew your CA certificate.

If your using Microsoft Certificate Services, instruction for this can be found here:  Renew a root certification authority
0
 

Author Comment

by:christoforatos1968
ID: 40029612
The CA cert does not show that is expired. The expiration date shows 9/10/2023. The other certificate shows a date of 29/8/1902. Are you referring to this certificate as expired? With a date of 1902?
I downloaded the Certificate Authority from a Linux server. How can i renew the certificate?
0
 
LVL 10

Accepted Solution

by:
JEaston earned 500 total points
ID: 40029967
Looking at the pictures you attached, one certificate is issued by ca.skygreece.lan to ca.skygreece.lan.  This certificate is the CA Root certificate - also a self-signed certificate and the CA signed it's own certificate.  This expired in 1902, and therefore all certificates signed by this CA will not be trusted.

Therefore even though it issued a cert for skygreece.clearos.lan which appears to be valid, the fact your computer cannot trust the root cert means everything else in the chain is also untrusted.

Unfortunately I have not used any Linux CA's, and therefore have no idea how to renew the Root cert on linux.  Hopefully another expect will reply with help on that.
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

So you need a certificate so you can offer SSL encryption.  But which one should you get?  There are so many choices out there! Here is a generic overview of the main types of SSL certificates sold by the majority of commercial Certification Auth…
Preface There are many applications where some computing systems need have their system clocks running synchronized within a small margin and eventually need to be in sync with the global time. There are different solutions for this, i.e. the W3…
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…

831 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question