When there is an issue with a certificate, it is good practice to go to ssllabs 
to verify what is going on.

https://www.ssllabs.com/ssltest/analyze.html?d=i.bps%2dsberbank.by&hideResults=on&latest
shows that there is an incomplete certificate chain issue (in orange) which 
means that the server of the bank does not send all (intermediate) certificates.
Click on the blue '+' of certification paths and it shows that the 'GeoTrust 
RSA CA 2018' (intermediate certificate) had to be downloaded.

The messages are not from Squid but from ufdbGuard which apparently is 
configured with an option to block the URL is case of a certificate issue.
Since Squid already checks for valid certificate chains, I suggest to turn this 
option off in ufdbGuard.

Marcus


On 31/10/2018 11:48, Vacheslav wrote:
I do not use bump or splice if that is what you mean. I do not import 
certificates.. it works without proxy.

-----Original Message-----
From: squid-users <squid-users-boun...@lists.squid-cache.org> On Behalf Of 
Matus UHLAR - fantomas
Sent: Wednesday, October 31, 2018 5:46 PM
To: squid-users@lists.squid-cache.org
Subject: Re: [squid-users] bank blocked

On 31.10.18 17:41, Vacheslav wrote:
2018-10-31 17:34:45 [4270] TLSv1.2 certificate for i.bps-sberbank.by:443: 
UNRECOGNISED ISSUER  (maybe a certificate chain issue)  *****
2018-10-31 17:34:45 [4270]    issuer: /C=US/O=DigiCert 
Inc/OU=www.digicert.com/CN=GeoTrust RSA CA 2018

does your system recopgnize this authority? Do have actual list of CAs?

2018-10-31 17:34:45 [4270]    subject: /C=BY/L=Minsk/O=BPS-Sberbank OAO/OU=Head 
Office/CN=*.bps-sberbank.by
2018-10-31 17:34:45 [4270] TLSv1.2 connection to i.bps-sberbank.by:443 has 
error code 12. It is marked as a TLS/SSL certificate issue
2018-10-31 17:34:45 [4270] BLOCK -                10.17.10.17     config     
https-option  i.bps-sberbank.by:443 CONNECT

What is wrong?

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