Hello, I'm trying to get Squid (4.9) to reply to the client with a custom header which contains the error message returned from the external auth helper binary. For example, I'd like Squid to reply with a header like this: X-Custom-Err: ERR NO_BACKEND or X-Custom-Err: NO_BACKEND Where "ERR NO_BACKEND" is a response gathered from the auth helper. I've tried setting this in squid.conf, this way I can see the header however its value is always '-': reply_header_add X-Custom-Err "%err_detail" I also tried to define a custom error by modifying squid.conf and error-details.txt. That also didn't work, the value is always set to '-'. /etc/squid.conf: error_directory /etc/squid/error_directory/ deny_info CUSTOM_ERR_ACCESS_DENIED custom-auth reply_header_add X-Custom-Err "%err_detail" /etc/squid/error_directory/error-details.txt: name: CUSTOM_ERR_ACCESS_DENIED detail: "%m" descr: "Access denied" "%m" is the error message returned by external auth helper according to https://wiki.squid-cache.org/Features/CustomErrors#ERR_.2A_template_codes_for_embedding I also tried to log "%err_code %err_detail %et %ea" but all of these values except err_code are logged as '-'. Does anyone know how to do this or if this is possible to do in the first place? Thanks in advance, Irem _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users