It feels like the proxy may not be forwarding freshclam​'s HTTP User-Agent 
header.  We use that header to block unsupported software (like curl, wget, 
firefox, chrome, etc) from downloading the database files.  I don't know why 
that would change with just an in-place upgrade of the system to RHEL 8, 
however.

John, if you can get the HTTP "cf-ray" header value from the HTTP 403 response 
to the proxy, our Cloudflare admin can look for the firewall event logs in 
Cloudflare to confirm the reason for the 403 response.

Regards,
Micah


Micah Snyder (they/them)
ClamAV Development
Talos
Cisco Systems, Inc.
________________________________
From: clamav-users <clamav-users-boun...@lists.clamav.net> on behalf of Joel 
Esler via clamav-users <clamav-users@lists.clamav.net>
Sent: Thursday, March 7, 2024 2:44 PM
To: ClamAV users ML <clamav-users@lists.clamav.net>
Cc: Joel Esler <joel.es...@me.com>
Subject: Re: [clamav-users] Unable to download daily.cvd after upgrade to RHEL 8

Looks like you’re trying to connect through a proxy.  Not directly.
—
Sent from my iPhone

On Mar 7, 2024, at 13:34, John Paul Guay via clamav-users 
<clamav-users@lists.clamav.net> wrote:


Hello,

We have performed an In-Place upgrade to RHEL 8 on our system that ClamAV 
resides on and afterwards we are no longer able to download the daily.cvd.

Just a little history. The system is in a lab behind a corporate proxy and it 
requires proxy rules to be able to reach 
database.clamav.net<http://database.clamav.net> and 
clamav.net<http://clamav.net>. Prior to the upgrade there were no issues in 
downloading the signatures on an hourly basis. We have verified that the rules 
on the proxy are still valid and the system is able to reach the proxy but it 
seems like it’s being blocked at 
database.clamav.net<http://database.clamav.net>.

I’ve included some output below:


Thu Mar  7 11:52:47 2024 -> WARNING: Can't download daily.cvd 
fromhttps://database.clamav.net/daily.cvd

Thu Mar  7 11:52:47 2024 -> Trying again in 5 secs...

Thu Mar  7 11:52:52 2024 -> daily database available for update (local version: 
27075, remote version: 27207)

Thu Mar  7 11:52:52 2024 -> ERROR: Download failed (35) Thu Mar  7 11:52:52 
2024 -> ERROR:  Message: SSL connect error

Thu Mar  7 11:52:52 2024 -> ERROR: Can't download daily.cvd 
fromhttps://database.clamav.net/daily.cvd

Thu Mar  7 11:52:52 2024 -> Giving up onhttps://database.clamav.net...

Thu Mar  7 11:52:52 2024 -> ERROR: Update failed for database: daily

Thu Mar  7 11:52:52 2024 -> ERROR: Database update process failed: Connection 
failed

Thu Mar  7 11:52:52 2024 -> ERROR: Update failed.

Thu Mar  7 11:52:52 2024 -> --------------------------------------

Thu Mar  7 11:53:06 2024 -> Update process terminated

Thu Mar  7 11:53:08 2024 -> --------------------------------------

Thu Mar  7 11:53:08 2024 -> ClamAV update process started at Thu Mar  7 
11:53:08 2024

Thu Mar  7 11:53:08 2024 -> daily database available for update (local version: 
27075, remote version: 27207)

Thu Mar  7 11:53:08 2024 -> WARNING: Download failed (35) Thu Mar  7 11:53:08 
2024 -> WARNING:  Message: SSL connect error



[root@seti026 ~]# wget http://database.clamav.net/

URL transformed to HTTPS due to an HSTS policy

--2024-03-07 13:26:55--  https://database.clamav.net/

Resolving proxy.xxxxx.xxx-xxx.net<http://proxy.xxxxx.xxx-xxx.net> 
(proxy.xxxxx.xxx-xxx.net<http://proxy.xxxxx.xxx-xxx.net>)... 7.xx.xx.xx

Connecting to 
proxy.xxxxx.xxx-xxx.net<http://proxy.xxxxx.xxx-xxx.net>(proxy.xxxxx.xxx-xxx.net<http://proxy.xxxxx.xxx-xxx.net>)|
 7.xx.xx.xx |:8080... connected.

Proxy request sent, awaiting response... 403 Forbidden

2024-03-07 13:26:55 ERROR 403: Forbidden.

Let me know if you require anything else.

Thanks,
John

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