Hello,
since Chrome and Chrome-based browsers recently were updated to Chrome
90 I am experiencing a 502 proxy error when I try to access my web
servers with these browsers.
Before the update to Chrome 90 things worked fine, and everything still
works with Firefox.
Here's my setup:
--> webserver1
Internet --> router/firewall --> web server with reverse proxy -->
webserver2
--> webserver3
When accessing any of the web servers that are behind the reverse proxy
I get the following in the error.log of the web server that is
configured as reverse proxy:
[Fri May 14 11:50:20.555724 2021] [proxy_http:error] [pid 1466:tid
140450128164608] (20014)Internal error (specific information not
available): [client 192.168.0.1:42450] AH01102: error reading status
line from remote server 192.168.0.102:80
[Fri May 14 11:50:20.555768 2021] [proxy:error] [pid 1466:tid
140450128164608] [client 192.168.0.1:42450] AH00898: Error reading from
remote server returned by /
[Fri May 14 11:50:20.563497 2021] [reqtimeout:info] [pid 1467:tid
140450442671872] [client 192.168.0.1:42452] AH01382: Request header read
timeout
other_vhosts_access.log on web server with reverse proxy:
webserver1.com:443 192.168.0.1 - - [14/May/2021:11:50:00 +0200] "GET /
HTTP/1.1" 502 4344 "-" "Mozilla/5.0 (X11; Linux x86_64)
AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36
OPR/76.0.4017.123"
webserver2.com:443 192.168.0.1 - - [14/May/2021:11:50:20 +0200] "-" 408
3681 "-" "-"
webserver1.com:443 192.168.0.1 - - [14/May/2021:11:50:20 +0200] "GET
/favicon.ico HTTP/1.1" 200 24 "https://webserver1.com/" "Mozilla/5.0
(X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko)
Chrome/90.0.4430.93 Safari/537.36 OPR/76.0.4017.123"
access.log on webserver1:
192.168.3.11 - - [14/May/2021:11:50:20 +0200] "-" 408 0 "-" "-"
192.168.0.1 = router/firewall
192.168.3.11 = web server with reverse proxy in DMZ
192.168.0.102 = wevserver1
Here is the webserver1.conf in sites-enabled:
<IfModule mod_ssl.c>
<VirtualHost *:443>
ServerName webserver1.com
SSLEngine On
SSLProxyEngine On
ProxyPreserveHost On
<Proxy *>
Order deny,allow
Allow from all
</Proxy>
ProxyRequests Off
ProxyPreserveHost On
ProxyPass /zm/ http://192.168.0.102/zm/
ProxyPassReverse /zm/ http://192.168.0.102/zm/
ProxyPass / http://192.168.0.102/zm/
ProxyPassReverse / http://192.168.0.102/zm/
DocumentRoot /var/www/html
ProxyPass /.well-known !
Include /etc/letsencrypt/options-ssl-apache.conf
SSLCertificateFile /etc/letsencrypt/live/webserver1.com/fullchain.pem
SSLCertificateKeyFile /etc/letsencrypt/live/webserver1.com/privkey.pem
</VirtualHost>
</IfModule>
Apache version on the web server with reverse proxy and on webserver1
is: Apache/2.4.29 (Ubuntu) on Ubuntu 18.04.5
I wonder if there is anything wrong in my config? Any help is highly
appreciated.
Best regards,
Andreas
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