Description
HTTP,HTTPS, or Unix Domain Sockets (UDS) address used by the external web server.
Syntax
IPv4/IPv6 address(:port), UDS://path, or unix:path. Add "https://" in front of an IPv4/IPv6 address if the external web server uses HTTPS. Port is optional for IPv4/IPv6 addresses if the external web server uses the standard ports 80 or 443.
Example
192.168.0.10
127.0.0.1:5434
https://10.0.8.9
https://127.0.0.1:5438
UDS://tmp/lshttpd/php.sock
unix:/tmp/lshttpd/php.sock
Tips
If you proxy to another web server running on the same machine using an IPv4/IPv6 address, set the IP address to localhost or 127.0.0.1, so the external application is inaccessible from other machines.
Unix Domain Sockets generally provide higher performance than IPv4 or IPv6 sockets.