[Xymon] False SSL cert alerts

Thu Jun 29 02:10:28 CEST 2017

Well, I'm sure you'll learn quite a bit about certificates before you are done  ;-)

This can be difficult to troubleshoot as it is all encrypted (or won't work at all because it is so broken that it can't be encrypted)! There are the errors: write:error=104, no peer cert and no cert CA names. You will just need to work out what is happening. As Jeremy said, look at the server logs (esp the startup part). Try a self-signed certificate and see if that works.

You probably need to set up a test server and play with that....

good luck.

________________________________
Thanks for the help and the command.  However, since I know very little about certs, here is the results:

[xymon at xymon1 etc]$ openssl s_client -connect quikfm.vcu.edu:443<http://quikfm.vcu.edu:443> -showcerts
CONNECTED(00000003)
write:errno=104
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 0 bytes and written 247 bytes
---
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
---

On Tue, Jun 27, 2017 at 7:56 PM, Phil Crooker <Phil.Crooker at orix.com.au<mailto:Phil.Crooker at orix.com.au>> wrote:

Browsers are a pretty opaque tool for testing certificates because of caching and locally stored certificates. Try openssl:

     openssl s_client -connect hostname:443 -showcerts

You should see the whole chain of certificates going back to a root cert. Are you missing an intermediate certificate? You may need to add it to the ssl config in the webserver - in apache you can just concatenate your host cert and the intermediate.

s_client shows the status of the connection at the bottom:

    Verify return code: 0 (ok)

Not 0 is an error of course.

As s_client opens a connection, you need to CTRL-C to break out (or issue an http command if you wish)

Hope that helps.

________________________________

But now it simply refuses to get a valid https connection from the Xymon server eventhough you can web-browse to it with no issues and the browser says there is a valid https/cert/connection?  Is there any place in Xymon I can see why it is failing?

On Tue, Jun 27, 2017 at 3:39 PM, John Thurston <john.thurston at alaska.gov<mailto:john.thurston at alaska.gov>> wrote:
On 6/27/2017 11:17 AM, Zoltan Forray wrote:
We are constantly having issues with sslcert alerts going non-green
eventhough it says the cert is fine.  Related to this is there being an
issue getting to the https page from the Xymon server yet I can access
it just fine from my browser.

Any failure to establish an SSL connection will result in an error under sslcert. Could it be a failure to negotiate a secure connection due to an unreliable network connection?

I suggest looking in the error log on your web server. You may find severed or incomplete connection attempts.

--
   Do things because you should, not just because you can.

John Thurston    907-465-8591<tel:907-465-8591>
John.Thurston at alaska.gov<mailto:John.Thurston at alaska.gov>
Department of Administration
State of Alaska
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--
Zoltan Forray
Spectrum Protect (p.k.a. TSM) Software & Hardware Administrator
Xymon Monitor Administrator
VMware Administrator
Virginia Commonwealth University
UCC/Office of Technology Services
www.ucc.vcu.edu<http://www.ucc.vcu.edu>
zforray at vcu.edu<mailto:zforray at vcu.edu> - 804-828-4807<tel:(804)%20828-4807>
Don't be a phishing victim - VCU and other reputable organizations will never use email to request that you reply with your password, social security number or confidential personal information. For more details visit http://infosecurity.vcu.edu/phishing.html
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Zoltan Forray
Spectrum Protect (p.k.a. TSM) Software & Hardware Administrator
Xymon Monitor Administrator
VMware Administrator
Virginia Commonwealth University
UCC/Office of Technology Services
www.ucc.vcu.edu<http://www.ucc.vcu.edu>
zforray at vcu.edu<mailto:zforray at vcu.edu> - 804-828-4807
Don't be a phishing victim - VCU and other reputable organizations will never use email to request that you reply with your password, social security number or confidential personal information. For more details visit http://infosecurity.vcu.edu/phishing.html
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