Does your Chrome console have some additional hints?
Thanks
Michael
Am Fr., 14. Mai 2021 um 14:44 Uhr schrieb Andreas Habel <
aha...@uni-bremen.de>:
> 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:
>
>
>
> ServerName webserver1.com
> SSLEngine On
> SSLProxyEngine On
> ProxyPreserveHost On
>
> Order deny,allow
> Allow from all
>
> 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
>
>
>
> 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
>
>