No, there is no further information: GET https://webserver1.com/ 502 (Proxy Error) favicon.ico:1 GET https://webserver1.com/favicon.ico 502 (Proxy Error)
Andreas On 14.05.2021 17:00, Michael Wechner wrote:
Does your Chrome console have some additional hints? Thanks MichaelAm Fr., 14. Mai 2021 um 14:44 Uhr schrieb Andreas Habel <aha...@uni-bremen.de <mailto: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 <http://192.168.0.1:42450>] AH01102: error reading status line from remote server 192.168.0.102:80 <http://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 <http://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 <http://192.168.0.1:42452>] AH01382: Request header read timeout other_vhosts_access.log on web server with reverse proxy: webserver1.com:443 <http://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 <http://webserver2.com:443> 192.168.0.1 - - [14/May/2021:11:50:20 +0200] "-" 408 3681 "-" "-" webserver1.com:443 <http://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/ <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 <http://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/ <http://192.168.0.102/zm/> ProxyPassReverse /zm/ http://192.168.0.102/zm/ <http://192.168.0.102/zm/> ProxyPass / http://192.168.0.102/zm/ <http://192.168.0.102/zm/> ProxyPassReverse / http://192.168.0.102/zm/ <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 <http://webserver1.com/fullchain.pem> SSLCertificateKeyFile /etc/letsencrypt/live/webserver1.com/privkey.pem <http://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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